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* [PATCH v3 0/5] proc: improve root readdir latency with many threads
@ 2022-12-02 17:16 Brian Foster
  2022-12-02 17:16 ` [PATCH v3 1/5] pid: replace pidmap_lock with xarray lock Brian Foster
                   ` (5 more replies)
  0 siblings, 6 replies; 13+ messages in thread
From: Brian Foster @ 2022-12-02 17:16 UTC (permalink / raw)
  To: linux-mm, linux-fsdevel, linux-kernel; +Cc: ikent, onestero, willy, ebiederm

Hi all,

Here's v3 of the /proc readdir optimization patches. See v1 for the full
introductary cover letter.

Most of the feedback received to this point has been around switching
the pid code over to use the xarray api instead of the idr. Matt Wilcox
posted most of the code to do that. I cleaned it up a bit and posted a
standalone series for that here [1], but didn't receive any feedback.
Patches 1-3 of this series are essentially a repost of [1].

Patches 4-5 are otherwise mostly the same as v2 outside of switching
over to use the xarray bits instead of the idr/radix-tree.

Thoughts, reviews, flames appreciated.

Brian

[1] https://lore.kernel.org/linux-mm/20220715113349.831370-1-bfoster@redhat.com/

v3:
- Drop radix-tree fixups.
- Convert pid idr usage to xarray.
- Replace tgid radix-tree tag set/lookup to use xarray mark.
v2: https://lore.kernel.org/linux-fsdevel/20220711135237.173667-1-bfoster@redhat.com/
- Clean up idr helpers to be more generic.
- Use ->idr_base properly.
- Lift tgid iteration helper into pid.c to abstract tag logic from
  users.
v1: https://lore.kernel.org/linux-fsdevel/20220614180949.102914-1-bfoster@redhat.com/

Brian Foster (5):
  pid: replace pidmap_lock with xarray lock
  pid: split cyclic id allocation cursor from idr
  pid: switch pid_namespace from idr to xarray
  pid: mark pids associated with group leader tasks
  procfs: use efficient tgid pid search on root readdir

 arch/powerpc/platforms/cell/spufs/sched.c |   2 +-
 fs/proc/base.c                            |  17 +--
 fs/proc/loadavg.c                         |   2 +-
 include/linux/pid.h                       |   3 +-
 include/linux/pid_namespace.h             |   9 +-
 include/linux/threads.h                   |   2 +-
 init/main.c                               |   3 +-
 kernel/fork.c                             |   2 +-
 kernel/pid.c                              | 177 +++++++++++++---------
 kernel/pid_namespace.c                    |  23 ++-
 10 files changed, 132 insertions(+), 108 deletions(-)

-- 
2.37.3


^ permalink raw reply	[flat|nested] 13+ messages in thread

end of thread, other threads:[~2022-12-13  2:03 UTC | newest]

Thread overview: 13+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2022-12-02 17:16 [PATCH v3 0/5] proc: improve root readdir latency with many threads Brian Foster
2022-12-02 17:16 ` [PATCH v3 1/5] pid: replace pidmap_lock with xarray lock Brian Foster
2022-12-12  1:44   ` Ian Kent
2022-12-02 17:16 ` [PATCH v3 2/5] pid: split cyclic id allocation cursor from idr Brian Foster
2022-12-12  1:45   ` Ian Kent
2022-12-02 17:16 ` [PATCH v3 3/5] pid: switch pid_namespace from idr to xarray Brian Foster
2022-12-12  1:47   ` Ian Kent
2022-12-02 17:16 ` [PATCH v3 4/5] pid: mark pids associated with group leader tasks Brian Foster
2022-12-12  1:51   ` Ian Kent
2022-12-13  2:00   ` kernel test robot
2022-12-02 17:16 ` [PATCH v3 5/5] procfs: use efficient tgid pid search on root readdir Brian Foster
2022-12-12  1:58   ` Ian Kent
2022-12-12  2:05 ` [PATCH v3 0/5] proc: improve root readdir latency with many threads Ian Kent

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