| Message ID | 20241002-mgtime-v10-0-d1c4717f5284@kernel.org (mailing list archive) |
|---|---|
| Headers | show |
| Series | timekeeping/fs: multigrain timestamp redux | expand |
On Wed, 02 Oct 2024 17:27:15 -0400, Jeff Layton wrote: > This is a replacement for the v6 series sitting in Christian's > vfs.mgtime branch. The main changes here are to the changelogs, > documentation and comments. I've also moved the timekeeping patches to > the front of the series, and done some minor cleanups. > > The pipe1_threads test shows these averages on my test rig with this > series: > > [...] I've merged the tag that Thomas provided with the time specific changes and pulled the remaining patches - excluding 01/12 and 02/12. --- Applied to the vfs.mgtime branch of the vfs/vfs.git tree. Patches in the vfs.mgtime branch should appear in linux-next soon. Please report any outstanding bugs that were missed during review in a new review to the original patch series allowing us to drop it. It's encouraged to provide Acked-bys and Reviewed-bys even though the patch has now been applied. If possible patch trailers will be updated. Note that commit hashes shown below are subject to change due to rebase, trailer updates or similar. If in doubt, please check the listed branch. tree: https://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs.git branch: vfs.mgtime [03/12] fs: add infrastructure for multigrain timestamps https://git.kernel.org/vfs/vfs/c/4e40eff0b573 [04/12] fs: have setattr_copy handle multigrain timestamps appropriately https://git.kernel.org/vfs/vfs/c/b82f92d5dd1a [05/12] fs: handle delegated timestamps in setattr_copy_mgtime https://git.kernel.org/vfs/vfs/c/d8d11298e8a1 [06/12] fs: tracepoints around multigrain timestamp events https://git.kernel.org/vfs/vfs/c/a80f53809ccc [07/12] fs: add percpu counters for significant multigrain timestamp events https://git.kernel.org/vfs/vfs/c/7b1aba010c47 [08/12] Documentation: add a new file documenting multigrain timestamps https://git.kernel.org/vfs/vfs/c/95c6907be544 [09/12] xfs: switch to multigrain timestamps https://git.kernel.org/vfs/vfs/c/0f4865448420 [10/12] ext4: switch to multigrain timestamps https://git.kernel.org/vfs/vfs/c/e44ab3151adc [11/12] btrfs: convert to multigrain timestamps https://git.kernel.org/vfs/vfs/c/0d4f9f7ad685 [12/12] tmpfs: add support for multigrain timestamps https://git.kernel.org/vfs/vfs/c/cba2a92eff80
This is a replacement for the v6 series sitting in Christian's vfs.mgtime branch. The main changes here are to the changelogs, documentation and comments. I've also moved the timekeeping patches to the front of the series, and done some minor cleanups. The pipe1_threads test shows these averages on my test rig with this series: v6.11: 89233600 (baseline) v6.11 + v9 series: 88460897 (<1% slower) Thanks for all of the review so far! Signed-off-by: Jeff Layton <jlayton@kernel.org> --- Changes in v10: - Reorder timekeeping patches to front of series - Better separate timekeeping and fs changes - add data_race annotations to per_cpu fetches - get rid of pointless test for unsigned long to go negative - better spacing for declarations and definitions in timekeeping_internal.h - minor style cleanups - Link to v9: https://lore.kernel.org/r/20241002-mgtime-v9-0-77e2baad57ac@kernel.org Changes in v9: - Comment and documentation cleanups. - Drop the EXPORT_SYMBOL_GPL() from new timekeeper interfaces - Link to v8: https://lore.kernel.org/r/20241001-mgtime-v8-0-903343d91bc3@kernel.org Changes in v8: - split patch that adds percpu counters into fs and timekeeping patches - convert percpu counters to unsigned longs - directly access the offs_real value in timekeeper instead of going through offsets array - drop WARN_ON's in timekeeping patches - better changelogs and more comments for the timekeeping bits - better document how backward realtime clock jumps affect things - Link to v7: https://lore.kernel.org/r/20240913-mgtime-v7-0-92d4020e3b00@kernel.org Changes in v7: - move the floor value handling into timekeeper for better performance - Link to v6: https://lore.kernel.org/r/20240715-mgtime-v6-0-48e5d34bd2ba@kernel.org Changes in v6: - Normalize timespec64 in inode_set_ctime_to_ts - use DEFINE_PER_CPU counters for better vfs consistency - skip ctime cmpxchg if the result means nothing will change - add trace_ctime_xchg_skip to track skipped ctime updates - use __print_flags in ctime_ns_xchg tracepoint - Link to v5: https://lore.kernel.org/r/20240711-mgtime-v5-0-37bb5b465feb@kernel.org Changes in v5: - refetch coarse time in coarse_ctime if not returning floor - timestamp_truncate before swapping new ctime value into place - track floor value as atomic64_t - cleanups to Documentation file - Link to v4: https://lore.kernel.org/r/20240708-mgtime-v4-0-a0f3c6fb57f3@kernel.org Changes in v4: - reordered tracepoint fields for better packing - rework percpu counters again to also count fine grained timestamps - switch to try_cmpxchg for better efficiency - Link to v3: https://lore.kernel.org/r/20240705-mgtime-v3-0-85b2daa9b335@kernel.org Changes in v3: - Drop the conversion of i_ctime fields to ktime_t, and use an unused bit of the i_ctime_nsec field as QUERIED flag. - Better tracepoints for tracking floor and ctime updates - Reworked percpu counters to be more useful - Track floor as monotonic value, which eliminates clock-jump problem Changes in v2: - Added Documentation file - Link to v1: https://lore.kernel.org/r/20240626-mgtime-v1-0-a189352d0f8f@kernel.org --- Jeff Layton (12): timekeeping: add interfaces for handling timestamps with a floor value timekeeping: add percpu counter for tracking floor swap events fs: add infrastructure for multigrain timestamps fs: have setattr_copy handle multigrain timestamps appropriately fs: handle delegated timestamps in setattr_copy_mgtime fs: tracepoints around multigrain timestamp events fs: add percpu counters for significant multigrain timestamp events Documentation: add a new file documenting multigrain timestamps xfs: switch to multigrain timestamps ext4: switch to multigrain timestamps btrfs: convert to multigrain timestamps tmpfs: add support for multigrain timestamps Documentation/filesystems/index.rst | 1 + Documentation/filesystems/multigrain-ts.rst | 125 ++++++++++++ fs/attr.c | 60 +++++- fs/btrfs/file.c | 25 +-- fs/btrfs/super.c | 3 +- fs/ext4/super.c | 2 +- fs/inode.c | 282 +++++++++++++++++++++++++--- fs/stat.c | 46 ++++- fs/xfs/libxfs/xfs_trans_inode.c | 6 +- fs/xfs/xfs_iops.c | 10 +- fs/xfs/xfs_super.c | 2 +- include/linux/fs.h | 36 +++- include/linux/timekeeping.h | 5 + include/trace/events/timestamp.h | 124 ++++++++++++ kernel/time/timekeeping.c | 106 +++++++++++ kernel/time/timekeeping_debug.c | 14 ++ kernel/time/timekeeping_internal.h | 15 ++ mm/shmem.c | 2 +- 18 files changed, 791 insertions(+), 73 deletions(-) --- base-commit: 98f7e32f20d28ec452afb208f9cffc08448a2652 change-id: 20240913-mgtime-20c98bcda88e Best regards,