September 2017 - Linux-nvdimm

[PATCH v3 0/2] Support ACPI 6.1 update in NFIT Control Region Structure

by Toshi Kani

ACPI 6.1, Table 5-133, updates NVDIMM Control Region Structure as follows. - Valid Fields, Manufacturing Location, and Manufacturing Date are added from reserved range. No change in the structure size. - IDs (SPD values) are stored as arrays of bytes (i.e. big-endian format). The spec clarifies that they need to be represented as arrays of bytes as well. Patch 1 changes the NFIT driver to comply with ACPI 6.1. Patch 2 adds a new sysfs file "id" to show NVDIMM ID defined in ACPI 6.1. The patch-set applies on linux-pm.git acpica. link: http://www.uefi.org/sites/default/files/resources/ACPI_6_1.pdf --- v3: - Need to coordinate with ACPICA update (Bob Moore, Dan Williams) - Integrate with ACPICA changes in struct acpi_nfit_control_region. (commit 138a95547ab0) v2: - Remove 'mfg_location' and 'mfg_date'. (Dan Williams) - Rename 'unique_id' to 'id' and make this change as a separate patch. (Dan Williams) --- Toshi Kani (3): 1/2 acpi/nfit: Update nfit driver to comply with ACPI 6.1 2/3 acpi/nfit: Add sysfs "id" for NVDIMM ID --- drivers/acpi/nfit.c | 29 ++++++++++++++++++++++++----- 1 file changed, 24 insertions(+), 5 deletions(-)

3 years, 4 months

4
12
0 / 0

Re: [PATCH] nvdimm: Remove minimum size requirement

by Soccer Liu

Hi: As part of processing in setting up the environment for running unitests, I was able to work through the instrcutions in https://github.com/pmem/ndctl/tree/0a628fdf4fe58a283b16c1bbaa49bb28b1842b... the way until I hit the followingbuild error (Segmentation fault) when buiding libnvdimm.o. Anyone hit this before? root@ubuntu:/home/soccerl/nvdimm# make M=tools/testing/nvdimm AR tools/testing/nvdimm/built-in.o CC [M] tools/testing/nvdimm/../../../drivers/nvdimm/core.o CC [M] tools/testing/nvdimm/../../../drivers/nvdimm/bus.o CC [M] tools/testing/nvdimm/../../../drivers/nvdimm/dimm_devs.o CC [M] tools/testing/nvdimm/../../../drivers/nvdimm/dimm.o CC [M] tools/testing/nvdimm/../../../drivers/nvdimm/region_devs.o CC [M] tools/testing/nvdimm/../../../drivers/nvdimm/region.o CC [M] tools/testing/nvdimm/../../../drivers/nvdimm/namespace_devs.o CC [M] tools/testing/nvdimm/../../../drivers/nvdimm/label.o CC [M] tools/testing/nvdimm/../../../drivers/nvdimm/claim.o CC [M] tools/testing/nvdimm/../../../drivers/nvdimm/btt_devs.o CC [M] tools/testing/nvdimm/../../../drivers/nvdimm/pfn_devs.o CC [M] tools/testing/nvdimm/../../../drivers/nvdimm/dax_devs.o CC [M] tools/testing/nvdimm/config_check.o LD [M] tools/testing/nvdimm/libnvdimm.oSegmentation faultscripts/Makefile.build:548: recipe for target 'tools/testing/nvdimm/libnvdimm.o' failedmake[1]: *** [tools/testing/nvdimm/libnvdimm.o] Error 139Makefile:1511: recipe for target '_module_tools/testing/nvdimm' failedmake: *** [_module_tools/testing/nvdimm] Error 2 My devbox has 4.13 Linux in it.I am not sure whether it has anything to do with fact that I didnt do anything with ndctl/ndctl.spec.in (because I am not sure how to apply those dependendies to my testbox) Any idea? ThanksCheng-mean On Thursday, August 31, 2017 3:31 PM, Dan Williams <dan.j.williams(a)intel.com> wrote: On Mon, Aug 7, 2017 at 11:13 AM, Dan Williams <dan.j.williams(a)intel.com> wrote: > On Mon, Aug 7, 2017 at 11:09 AM, Cheng-mean Liu (SOCCER) > <soccerl(a)microsoft.com> wrote: >> Hi Dan: >> >> I am wondering if failing on those unittests is still an issue for this minimum size requirement change. > > Yes, I just haven't had a chance to circle back and get this fixed up. > > You can reproduce by running: > > make TESTS=dpa-alloc check > > ...in a checkout of the ndctl project: https://github.com/pmem/ndctl > > If you attempt that, note the required setup of the nfit_test modules > documented in README.md in that same repository. I have not had any time to fix up the unit test for this. Soccer, can you take a look?

3 years, 9 months

2
2
0 / 0

[PATCH v6 0/8] libnvdimm: add DMA supported blk-mq pmem driver

by Dave Jiang

v6: - Put all common code for pmem drivers in pmem_core per Dan's suggestion. - Added support code to get number of available DMA chans - Fixed up Kconfig so that when pmem is built into the kernel, pmem_dma won't show up. v5: - Added support to report descriptor transfer capability limit from dmaengine. - Fixed up scatterlist support for dma_unmap_data per Dan's comments. - Made the driver a separate pmem blk driver per Christoph's suggestion and also fixed up all the issues pointed out by Christoph. - Added pmem badblock checking/handling per Robert and also made DMA op to be used by all buffer sizes. v4: - Addressed kbuild test bot issues. Passed kbuild test bot, 179 configs. v3: - Added patch to rename DMA_SG to DMA_SG_SG to make it explicit - Added DMA_MEMCPY_SG transaction type to dmaengine - Misc patch to add verification of DMA_MEMSET_SG that was missing - Addressed all nd_pmem driver comments from Ross. v2: - Make dma_prep_memcpy_* into one function per Dan. - Addressed various comments from Ross with code formatting and etc. - Replaced open code with offset_in_page() macro per Johannes. The following series implements a blk-mq pmem driver and also adds infrastructure code to ioatdma and dmaengine in order to support copying to and from scatterlist in order to process block requests provided by blk-mq. The usage of DMA engines available on certain platforms allow us to drastically reduce CPU utilization and at the same time maintain performance that is good enough. Experimentations have been done on DRAM backed pmem block device that showed the utilization of DMA engine is beneficial. By default nd_pmem.ko will be loaded. This can be overridden through module blacklisting in order to load nd_pmem_dma.ko. --- Dave Jiang (8): dmaengine: ioatdma: revert 7618d035 to allow sharing of DMA channels dmaengine: Add DMA_MEMCPY_SG transaction op dmaengine: add verification of DMA_MEMSET_SG in dmaengine dmaengine: ioatdma: dma_prep_memcpy_sg support dmaengine: add function to provide per descriptor xfercap for dma engine dmaengine: add SG support to dmaengine_unmap dmaengine: provide number of available channels libnvdimm: Add blk-mq pmem driver Documentation/dmaengine/provider.txt | 3 drivers/dma/dmaengine.c | 76 ++++ drivers/dma/ioat/dma.h | 4 drivers/dma/ioat/init.c | 6 drivers/dma/ioat/prep.c | 57 +++ drivers/nvdimm/Kconfig | 21 + drivers/nvdimm/Makefile | 6 drivers/nvdimm/pmem.c | 264 --------------- drivers/nvdimm/pmem.h | 48 +++ drivers/nvdimm/pmem_core.c | 298 +++++++++++++++++ drivers/nvdimm/pmem_dma.c | 606 ++++++++++++++++++++++++++++++++++ include/linux/dmaengine.h | 49 +++ 12 files changed, 1170 insertions(+), 268 deletions(-) create mode 100644 drivers/nvdimm/pmem_core.c create mode 100644 drivers/nvdimm/pmem_dma.c -- Signature

3 years, 11 months

5
16
0 / 0

Re: KVM "fake DAX" flushing interface - discussion

by Dan Williams

On Wed, Jul 26, 2017 at 2:27 PM, Rik van Riel <riel(a)redhat.com> wrote: > On Wed, 2017-07-26 at 09:47 -0400, Pankaj Gupta wrote: >> > >> Just want to summarize here(high level): >> >> This will require implementing new 'virtio-pmem' device which >> presents >> a DAX address range(like pmem) to guest with read/write(direct >> access) >> & device flush functionality. Also, qemu should implement >> corresponding >> support for flush using virtio. >> > Alternatively, the existing pmem code, with > a flush-only block device on the side, which > is somehow associated with the pmem device. > > I wonder which alternative leads to the least > code duplication, and the least maintenance > hassle going forward. I'd much prefer to have another driver. I.e. a driver that refactors out some common pmem details into a shared object and can attach to ND_DEVICE_NAMESPACE_{IO,PMEM}. A control device on the side seems like a recipe for confusion. With a $new_driver in hand you can just do: modprobe $new_driver echo $namespace > /sys/bus/nd/drivers/nd_pmem/unbind echo $namespace > /sys/bus/nd/drivers/$new_driver/new_id echo $namespace > /sys/bus/nd/drivers/$new_driver/bind ...and the guest can arrange for $new_driver to be the default, so you don't need to do those steps each boot of the VM, by doing: echo "blacklist nd_pmem" > /etc/modprobe.d/virt-dax-flush.conf echo "alias nd:t4* $new_driver" >> /etc/modprobe.d/virt-dax-flush.conf echo "alias nd:t5* $new_driver" >> /etc/modprobe.d/virt-dax-flush.conf

3 years, 11 months

4
14
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Enabling peer to peer device transactions for PCIe devices

by Deucher, Alexander

This is certainly not the first time this has been brought up, but I'd like to try and get some consensus on the best way to move this forward. Allowing devices to talk directly improves performance and reduces latency by avoiding the use of staging buffers in system memory. Also in cases where both devices are behind a switch, it avoids the CPU entirely. Most current APIs (DirectGMA, PeerDirect, CUDA, HSA) that deal with this are pointer based. Ideally we'd be able to take a CPU virtual address and be able to get to a physical address taking into account IOMMUs, etc. Having struct pages for the memory would allow it to work more generally and wouldn't require as much explicit support in drivers that wanted to use it. Some use cases: 1. Storage devices streaming directly to GPU device memory 2. GPU device memory to GPU device memory streaming 3. DVB/V4L/SDI devices streaming directly to GPU device memory 4. DVB/V4L/SDI devices streaming directly to storage devices Here is a relatively simple example of how this could work for testing. This is obviously not a complete solution. - Device memory will be registered with Linux memory sub-system by created corresponding struct page structures for device memory - get_user_pages_fast() will return corresponding struct pages when CPU address points to the device memory - put_page() will deal with struct pages for device memory Previously proposed solutions and related proposals: 1.P2P DMA DMA-API/PCI map_peer_resource support for peer-to-peer (http://www.spinics.net/lists/linux-pci/msg44560.html) Pros: Low impact, already largely reviewed. Cons: requires explicit support in all drivers that want to support it, doesn't handle S/G in device memory. 2. ZONE_DEVICE IO Direct I/O and DMA for persistent memory (https://lwn.net/Articles/672457/) Add support for ZONE_DEVICE IO memory with struct pages. (https://patchwork.kernel.org/patch/8583221/) Pro: Doesn't waste system memory for ZONE metadata Cons: CPU access to ZONE metadata slow, may be lost, corrupted on device reset. 3. DMA-BUF RDMA subsystem DMA-BUF support (http://www.spinics.net/lists/linux-rdma/msg38748.html) Pros: uses existing dma-buf interface Cons: dma-buf is handle based, requires explicit dma-buf support in drivers. 4. iopmem iopmem : A block device for PCIe memory (https://lwn.net/Articles/703895/) 5. HMM Heterogeneous Memory Management (http://lkml.iu.edu/hypermail/linux/kernel/1611.2/02473.html) 6. Some new mmap-like interface that takes a userptr and a length and returns a dma-buf and offset? Alex

4 years

23
128
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[RFC patch 1/4]ndctl: nvdimmd: notify/monitor the feathers of over threshold event

by Qi, Fuli

Libnvdimmd.c provides functions which are used by nvdimm daemon, and currently it just supports for logging. Libnvdimmd.h is a head file of libnvdimmd.c. Since I do not use automake, I defined gentenv.h to compile instead of it temporarily. So I suppose more good way is necessary. Signed-off-by: QI Fuli <qi.fuli(a)jp.fujitsu.com> --- nvdimmd/Makefile | 7 +++ nvdimmd/getenv.h | 1 + nvdimmd/libnvdimmd.c | 141 +++++++++++++++++++++++++++++++++++++++++++++++++++ nvdimmd/libnvdimmd.h | 31 +++++++++++ 4 files changed, 180 insertions(+) diff --git a/nvdimmd/Makefile b/nvdimmd/Makefile new file mode 100644 index 0000000..a20a747 --- /dev/null +++ b/nvdimmd/Makefile @@ -0,0 +1,7 @@ +CC = gcc +IDIR = -I../ -I../ndctl + +libnvdimmd.o: libnvdimmd.c + $(CC) -o libnvdimmd.o $(IDIR) -c libnvdimmd.c +clean: + rm -rf *.o diff --git a/nvdimmd/getenv.h b/nvdimmd/getenv.h new file mode 100644 index 0000000..45747b4 --- /dev/null +++ b/nvdimmd/getenv.h @@ -0,0 +1 @@ +#define HAVE_SECURE_GETENV 1 diff --git a/nvdimmd/libnvdimmd.c b/nvdimmd/libnvdimmd.c new file mode 100644 index 0000000..89ff701 --- /dev/null +++ b/nvdimmd/libnvdimmd.c @@ -0,0 +1,141 @@ +/* + * Copyright (c) 2017, FUJITSU LIMITED. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU Lesser General Public License, + * version 2.1, as published by the Free Software Foundation. + * + * This program is distributed in the hope it will be useful, but WITHOUT ANY + * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS + * FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for + * more details. + */ + +/* + * This program is used to provide nvdimm daemon necessary functions. + */ + +#include "getenv.h" +#include <stdio.h> +#include <stdlib.h> +#include <unistd.h> +#include <string.h> +#include <sys/stat.h> +#include <syslog.h> +#include <ndctl/libndctl.h> +#include <ndctl/lib/libndctl-private.h> +#include "libnvdimmd.h" +#define BUF_SIZE 4096 + +static int get_health_info(threshold_dimm *t_dimm) +{ + struct ndctl_cmd *cmd; + int rc; + unsigned int flags; + char *msg = "nvdimm warning: dimm over threshold notify"; + char *err_msg; + + cmd = ndctl_dimm_cmd_new_smart(t_dimm->dimm); + if (!cmd) { + err_msg = "failed to prepare command to get health info"; + syslog(LOG_WARNING, "%s [%s], %s\n", msg, t_dimm->devname, err_msg); + return -1; + } + + rc = ndctl_cmd_submit(cmd); + if (rc || ndctl_cmd_get_firmware_status(cmd)) { + err_msg = "failed to submit command to get health info"; + syslog(LOG_WARNING, "%s [%s], %s\n", msg, t_dimm->devname, err_msg); + ndctl_cmd_unref(cmd); + return -1; + } + + flags = ndctl_cmd_smart_get_flags(cmd); + if (flags & ND_SMART_HEALTH_VALID) { + unsigned int health = ndctl_cmd_smart_get_health(cmd); + if (health & ND_SMART_FATAL_HEALTH) + t_dimm->health_state = "fatal"; + else if (health & ND_SMART_CRITICAL_HEALTH) + t_dimm->health_state = "critical"; + else if (health & ND_SMART_NON_CRITICAL_HEALTH) + t_dimm->health_state = "non-critical"; + else + t_dimm->health_state = "ok"; + } else { + t_dimm->health_state = "failed to get data"; + } + if (flags & ND_SMART_SPARES_VALID) + t_dimm->spares = ndctl_cmd_smart_get_spares(cmd); + else + t_dimm->spares = -1; + + ndctl_cmd_unref(cmd); + return 0; +} + +int log_notify(threshold_dimm *t_dimm, int count_dimm, fd_set fds, int count_select) +{ + int log_notify = 0; + char *msg = "nvdimm warning: dimm over threshold notify"; + + for (int i = 0; i < count_dimm; i++) { + if (log_notify >= count_select) + break; + + if (!FD_ISSET(t_dimm[i].health_eventfd, &fds)) + continue; + + log_notify++; + if (get_health_info(&t_dimm[i])) + continue; + + if (t_dimm[i].spares == -1) { + syslog(LOG_WARNING, + "%s [%s]\nhealth_state: %s\n" + "spares_percentage: failed to get data\n", + msg, t_dimm[i].devname, t_dimm[i].health_state); + continue; + } + syslog(LOG_WARNING,"%s [%s]\nhealth_state: %s\nspares_percentage: %d\n", + msg, t_dimm[i].devname, t_dimm[i].health_state, t_dimm[i].spares); + } + return log_notify; +} + +static struct ndctl_dimm *is_supported_threshold_notify(struct ndctl_dimm *dimm) +{ + if (ndctl_dimm_is_cmd_supported(dimm, ND_CMD_SMART_THRESHOLD)) + return dimm; + return NULL; +} + +int +get_threshold_dimm(struct ndctl_ctx *ctx, threshold_dimm *t_dimm, fd_set *fds, int *maxfd) +{ + struct ndctl_bus *bus; + struct ndctl_dimm *dimm; + char buf[BUF_SIZE]; + int fd, count_dimm = 0; + + ndctl_bus_foreach(ctx, bus) { + ndctl_dimm_foreach(bus, dimm) { + + if (!is_supported_threshold_notify(dimm)) + continue; + t_dimm[count_dimm].dimm = dimm; + t_dimm[count_dimm].devname = ndctl_dimm_get_devname(dimm); + fd = ndctl_dimm_get_health_eventfd(dimm); + read(fd, buf, sizeof(buf)); + t_dimm[count_dimm].health_eventfd = fd; + + if (fds) + FD_SET(fd, fds); + if (maxfd) { + if (*maxfd < fd) + *maxfd = fd; + } + count_dimm++; + } + } + return count_dimm; +} diff --git a/nvdimmd/libnvdimmd.h b/nvdimmd/libnvdimmd.h new file mode 100644 index 0000000..78e5871 --- /dev/null +++ b/nvdimmd/libnvdimmd.h @@ -0,0 +1,31 @@ +/* + * Copyright (c) 2017, FUJITSU LIMITED. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU Lesser General Public License, + * version 2.1, as published by the Free Software Foundation. + * + * This program is distributed in the hope it will be useful, but WITHOUT ANY + * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS + * FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for + * more details. + */ + +#ifndef _LIBNVDIMMD_H_ +#define _LIBBVDIMMD_H_ + +#include <stdio.h> +#define NUM_MAX_DIMM 1024 + +typedef struct { + struct ndctl_dimm *dimm; + const char *devname; + int health_eventfd; + int spares; + char *health_state; +} threshold_dimm; + +int log_notify(threshold_dimm *t_dimm, int count_dimm, fd_set fds, int count_select); +int get_threshold_dimm(struct ndctl_ctx *ctx, threshold_dimm *t_dimm, fd_set *fds, int *maxfd); + +#endif -- QI Fuli <qi.fuli(a)jp.fujitsu.com>

4 years

2
5
0 / 0

[PATCH v2 0/5] ext4: DAX data corruption fixes

by Ross Zwisler

This series prevents a pair of data corruptions with ext4 + DAX. The first such corruption happens when combining the inline data feature with DAX, and the second happens when combining data journaling with DAX. Both can be reliably reproduced with the fstests that I have posted here: https://patchwork.kernel.org/patch/9948377/ https://patchwork.kernel.org/patch/9948381/ My opinion is that the first three patches in this series should be applied to the v4.14 RC series and backported to stable. The last two patches in this series are just cleanup and can probably wait until v4.15. Ross Zwisler (5): ext4: prevent data corruption with inline data + DAX ext4: prevent data corruption with journaling + DAX ext4: add sanity check for encryption + DAX ext4: add ext4_should_use_dax() ext4: remove duplicate extended attributes defs fs/ext4/ext4.h | 37 ------------------------------------- fs/ext4/inline.c | 10 ---------- fs/ext4/inode.c | 24 ++++++++++++++++-------- fs/ext4/ioctl.c | 16 +++++++++++++--- fs/ext4/super.c | 8 ++++++++ 5 files changed, 37 insertions(+), 58 deletions(-) -- 2.9.5

4 years

3
15
0 / 0

[RFC 00/16] NOVA: a new file system for persistent memory

by Steven Swanson

This is an RFC patch series that impements NOVA (NOn-Volatile memory Accelerated file system), a new file system built for PMEM. NOVA's goal is to provide a high-performance, full-featured, production-ready file system tailored for byte-addressable non-volatile memories (e.g., NVDIMMs and Intel's soon-to-be-released 3DXpoint DIMMs). It combines design elements from many other file systems to provide a combination of high-performance, strong consistency guarantees, and comprehensive data protection. NOVA supports DAX-style mmap, and making DAX perform well is a first-order priority in NOVA's design. NOVA was developed at the Non-Volatile Systems Laboratory in the Computer Science and Engineering Department at the University of California, San Diego. Its primary authors are Andiry Xu <jix024(a)eng.ucsd.edu>, Lu Zhang <luzh(a)eng.ucsd.edu>, and Steven Swanson <swanson(a)eng.ucsd.edu>. NOVA is stable enough to run complex applications, but there is substantial work left to do. This RFC is intended to gather feedback to guide its development toward eventual inclusion upstream. The patches are relative Linux 4.12. Overview ======== NOVA is primarily a log-structured file system, but rather than maintain a single global log for the entire file system, it maintains separate logs for each file (inode). NOVA breaks the logs into 4KB pages, they need not be contiguous in memory. The logs only contain metadata. File data pages reside outside the log, and log entries for write operations point to data pages they modify. File modification uses copy-on-write (COW) to provide atomic file updates. For file operations that involve multiple inodes, NOVA use small, fixed-sized redo logs to atomically append log entries to the logs of the inodes involved. This structure keeps logs small and makes garbage collection very fast. It also enables enormous parallelism during recovery from an unclean unmount, since threads can scan logs in parallel. NOVA replicates and checksums all metadata structures and protects file data with RAID-4-style parity. It supports checkpoints to facilitate backups. Documentation/filesystems/NOVA.txt contains some lower-level implementation and usage information. A more thorough discussion of NOVA's goals and design is avaialable in two papers: NOVA: A Log-structured File system for Hybrid Volatile/Non-volatile Main Memories http://cseweb.ucsd.edu/~swanson/papers/FAST2016NOVA.pdf Jian Xu and Steven Swanson Published in FAST 2016 Hardening the NOVA File System http://cseweb.ucsd.edu/~swanson/papers/TechReport2017HardenedNOVA.pdf UCSD-CSE Techreport CS2017-1018 Jian Xu, Lu Zhang, Amirsaman Memaripour, Akshatha Gangadharaiah, Amit Borase, Tamires Brito Da Silva, Andy Rudoff, Steven Swanson -steve --- Steven Swanson (16): NOVA: Documentation NOVA: Superblock and fs layout NOVA: PMEM allocation system NOVA: Inode operations and structures NOVA: Log data structures and operations NOVA: Lite-weight journaling for complex ops NOVA: File and directory operations NOVA: Garbage collection NOVA: DAX code NOVA: File data protection NOVA: Snapshot support NOVA: Recovery code NOVA: Sysfs and ioctl NOVA: Read-only pmem devices NOVA: Performance measurement NOVA: Build infrastructure Documentation/filesystems/00-INDEX | 2 Documentation/filesystems/nova.txt | 771 +++++++++++++++++ MAINTAINERS | 8 README.md | 173 ++++ arch/x86/include/asm/io.h | 1 arch/x86/mm/fault.c | 11 arch/x86/mm/ioremap.c | 25 - drivers/nvdimm/pmem.c | 14 fs/Kconfig | 2 fs/Makefile | 1 fs/nova/Kconfig | 15 fs/nova/Makefile | 9 fs/nova/balloc.c | 827 +++++++++++++++++++ fs/nova/balloc.h | 118 +++ fs/nova/bbuild.c | 1602 ++++++++++++++++++++++++++++++++++++ fs/nova/checksum.c | 912 ++++++++++++++++++++ fs/nova/dax.c | 1346 ++++++++++++++++++++++++++++++ fs/nova/dir.c | 760 +++++++++++++++++ fs/nova/file.c | 943 +++++++++++++++++++++ fs/nova/gc.c | 739 +++++++++++++++++ fs/nova/inode.c | 1467 +++++++++++++++++++++++++++++++++ fs/nova/inode.h | 389 +++++++++ fs/nova/ioctl.c | 185 ++++ fs/nova/journal.c | 474 +++++++++++ fs/nova/journal.h | 61 + fs/nova/log.c | 1411 ++++++++++++++++++++++++++++++++ fs/nova/log.h | 333 +++++++ fs/nova/mprotect.c | 604 ++++++++++++++ fs/nova/mprotect.h | 190 ++++ fs/nova/namei.c | 919 +++++++++++++++++++++ fs/nova/nova.h | 1137 ++++++++++++++++++++++++++ fs/nova/nova_def.h | 154 +++ fs/nova/parity.c | 411 +++++++++ fs/nova/perf.c | 594 +++++++++++++ fs/nova/perf.h | 96 ++ fs/nova/rebuild.c | 847 +++++++++++++++++++ fs/nova/snapshot.c | 1407 ++++++++++++++++++++++++++++++++ fs/nova/snapshot.h | 98 ++ fs/nova/stats.c | 685 +++++++++++++++ fs/nova/stats.h | 218 +++++ fs/nova/super.c | 1222 +++++++++++++++++++++++++++ fs/nova/super.h | 216 +++++ fs/nova/symlink.c | 153 +++ fs/nova/sysfs.c | 543 ++++++++++++ include/linux/io.h | 2 include/linux/mm.h | 2 include/linux/mm_types.h | 3 kernel/memremap.c | 24 + mm/memory.c | 2 mm/mmap.c | 1 mm/mprotect.c | 13 51 files changed, 22129 insertions(+), 11 deletions(-) create mode 100644 Documentation/filesystems/nova.txt create mode 100644 README.md create mode 100644 fs/nova/Kconfig create mode 100644 fs/nova/Makefile create mode 100644 fs/nova/balloc.c create mode 100644 fs/nova/balloc.h create mode 100644 fs/nova/bbuild.c create mode 100644 fs/nova/checksum.c create mode 100644 fs/nova/dax.c create mode 100644 fs/nova/dir.c create mode 100644 fs/nova/file.c create mode 100644 fs/nova/gc.c create mode 100644 fs/nova/inode.c create mode 100644 fs/nova/inode.h create mode 100644 fs/nova/ioctl.c create mode 100644 fs/nova/journal.c create mode 100644 fs/nova/journal.h create mode 100644 fs/nova/log.c create mode 100644 fs/nova/log.h create mode 100644 fs/nova/mprotect.c create mode 100644 fs/nova/mprotect.h create mode 100644 fs/nova/namei.c create mode 100644 fs/nova/nova.h create mode 100644 fs/nova/nova_def.h create mode 100644 fs/nova/parity.c create mode 100644 fs/nova/perf.c create mode 100644 fs/nova/perf.h create mode 100644 fs/nova/rebuild.c create mode 100644 fs/nova/snapshot.c create mode 100644 fs/nova/snapshot.h create mode 100644 fs/nova/stats.c create mode 100644 fs/nova/stats.h create mode 100644 fs/nova/super.c create mode 100644 fs/nova/super.h create mode 100644 fs/nova/symlink.c create mode 100644 fs/nova/sysfs.c -- Signature

4 years

5
20
0 / 0

[PATCH v4 0/3] acpi nfit: make emulation of translate SPA on nfit_test

by Yasunori Goto

Hello I made a v4 patch set to emulate translate SPA by nfit_test.ko module. If possible, please merge it. ---- This patch set is to emulate translate SPA feature by nfit_test.ko. Certainly the nfit acpi driver supports translate SPA interface via ND_CMD_CALL. But nfit_test does not support it yet. To test translate SPA with nfit_test, this patch set is needed. --- Change log since v3 [1]: - Rebase current libnvdimm-for-next branch. - Fix over 80 character lines and too much tabs which is pointed by Verma-san. (Thanks!) - Since ndctl became to use the name "nfit_cmd" instead of "passthru", "passthru" is renamed to "nfit_cmd". Change log since v2 [2]: - Make private defintion just for nfit_test. (NFIT_CMD_TRANSLATE_SPA, struct nd_cmd_translate_spa, and others) - Check region by kobj.name instead of using is_nd_pmem(). Change log since v1 [3]: - Separate patch set of kenel from ndctl patch set. - Change interface via ND_CMD_CALL. [1] https://www.mail-archive.com/linux-nvdimm@lists.01.org/msg05863.html [2] https://www.mail-archive.com/linux-nvdimm@lists.01.org/msg05582.html [3] https://www.mail-archive.com/linux-nvdimm@lists.01.org/msg05287.html ---- Thanks, --- Yasunori Goto

4 years

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[PATCH v2 0/4] dax: require 'struct page' and other fixups

by Dan Williams

Changes since v1 [1]: * quiet bdev_dax_supported() in favor of error messages emitted by the caller (Jeff) * fix leftover parentheses in vma_merge (Jeff) * improve the changelog for "dax: stop using VM_MIXEDMAP for dax" [1]: https://lists.01.org/pipermail/linux-nvdimm/2017-September/012645.html --- Prompted by a recent change to add more protection around setting up 'vm_flags' for a dax vma [1], rework the implementation to remove the requirement to set VM_MIXEDMAP and VM_HUGEPAGE. VM_MIXEDMAP is used by dax to direct mm paths like vm_normal_page() that the memory page it is dealing with is not typical memory from the linear map. The get_user_pages_fast() path, since it does not resolve the vma, is already using {pte,pmd}_devmap() as a stand-in for VM_MIXEDMAP, so we use that as a VM_MIXEDMAP replacement in some locations. In the cases where there is no pte to consult we fallback to using vma_is_dax() to detect the VM_MIXEDMAP special case. This patch series passes a run of the ndctl unit test suite and the 'mmap.sh' [2] test in particular. 'mmap.sh' tries to catch dependencies on VM_MIXEDMAP and {pte,pmd}_devmap(). [1]: https://lkml.org/lkml/2017/9/25/638 [2]: https://github.com/pmem/ndctl/blob/master/test/mmap.sh --- Dan Williams (4): dax: quiet bdev_dax_supported() dax: disable filesystem dax on devices that do not map pages dax: stop using VM_MIXEDMAP for dax dax: stop using VM_HUGEPAGE for dax drivers/dax/device.c | 1 - drivers/dax/super.c | 15 +++++++++++---- fs/ext2/file.c | 1 - fs/ext4/file.c | 1 - fs/xfs/xfs_file.c | 2 -- mm/huge_memory.c | 8 ++++---- mm/ksm.c | 3 +++ mm/madvise.c | 2 +- mm/memory.c | 20 ++++++++++++++++++-- mm/migrate.c | 3 ++- mm/mlock.c | 3 ++- mm/mmap.c | 3 ++- 12 files changed, 43 insertions(+), 19 deletions(-)

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Linux-nvdimm September 2017