Friendly ping...

On 2024/11/18 19:44, Ye Bin wrote:

From: Ye Bin <redacted>

As commit 04646aebd30b ("fs: avoid softlockups in s_inodes iterators")
introduces the retry logic. In the problem environment, the 'i_count'
of millions of files is not zero. As a result, the time slice for each
traversal to the matching inode process is almost used up, and then the
traversal is started from scratch. The worst-case scenario is that only
one inode can be processed after each wakeup. Because this process holds
a lock, other processes will be stuck for a long time, causing a series
of problems.
To solve the problem of repeated traversal from the beginning, each time
the CPU needs to be freed, a cursor is inserted into the linked list, and
the traversal continues from the cursor next time.

Ye Bin (11):
   fs: introduce I_CURSOR flag for inode
   block: use sb_for_each_inodes API
   fs: use sb_for_each_inodes API
   gfs2: use sb_for_each_inodes API
   fs: use sb_for_each_inodes_safe API
   fsnotify: use sb_for_each_inodes API
   quota: use sb_for_each_inodes API
   fs/super.c: use sb_for_each_inodes API
   landlock: use sb_for_each_inodes API
   fs: fix hungtask due to repeated traversal of inodes list
   fs: fix potential soft lockup when 'sb->s_inodes' has large number of
     inodes

  block/bdev.c           |  4 +--
  fs/drop_caches.c       |  2 +-
  fs/gfs2/ops_fstype.c   |  2 +-
  fs/inode.c             | 59 ++++++++++++++++++++++++++++--------------
  fs/notify/fsnotify.c   |  2 +-
  fs/quota/dquot.c       |  4 +--
  fs/super.c             |  2 +-
  include/linux/fs.h     | 45 ++++++++++++++++++++++++++++++++
  security/landlock/fs.c |  2 +-
  9 files changed, 93 insertions(+), 29 deletions(-)