]> git.proxmox.com Git - mirror_ubuntu-bionic-kernel.git/commit - fs/fuse/dev.c
fuse: limit queued background requests
authorMiklos Szeredi <mszeredi@suse.cz>
Wed, 6 Feb 2008 09:38:39 +0000 (01:38 -0800)
committerLinus Torvalds <torvalds@woody.linux-foundation.org>
Wed, 6 Feb 2008 18:41:13 +0000 (10:41 -0800)
commitd12def1bcb809b6172ee207a24e00a0a4398df1d
tree96e151de1e80cacd9202a00b77654533a9754207
parentb57d426445c98789265de6a9338cdb06462d15fb
fuse: limit queued background requests

Libfuse basically creates a new thread for each new request.  This is fine for
synchronous requests, which are naturally limited.  However background
requests (especially writepage) can cause a thread creation storm.

To avoid this, limit the number of background requests available to userspace.

This is done by introducing another queue for background requests, and a
counter for the number of "active" requests, which are currently available for
userspace.

Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
fs/fuse/dev.c
fs/fuse/fuse_i.h
fs/fuse/inode.c