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| author | Miklos Szeredi <mszeredi@suse.cz> | 2008-02-06 01:38:39 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2008-02-06 10:41:13 -0800 |
| commit | d12def1bcb809b6172ee207a24e00a0a4398df1d (patch) | |
| tree | 96e151de1e80cacd9202a00b77654533a9754207 /fs/fuse/inode.c | |
| parent | b57d426445c98789265de6a9338cdb06462d15fb (diff) | |
| download | op-kernel-dev-d12def1bcb809b6172ee207a24e00a0a4398df1d.zip op-kernel-dev-d12def1bcb809b6172ee207a24e00a0a4398df1d.tar.gz | |
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>
Diffstat (limited to 'fs/fuse/inode.c')
| -rw-r--r-- | fs/fuse/inode.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/fs/fuse/inode.c b/fs/fuse/inode.c index e5e80d1..c90f633 100644 --- a/fs/fuse/inode.c +++ b/fs/fuse/inode.c @@ -465,6 +465,7 @@ static struct fuse_conn *new_conn(void) INIT_LIST_HEAD(&fc->processing); INIT_LIST_HEAD(&fc->io); INIT_LIST_HEAD(&fc->interrupts); + INIT_LIST_HEAD(&fc->bg_queue); atomic_set(&fc->num_waiting, 0); fc->bdi.ra_pages = (VM_MAX_READAHEAD * 1024) / PAGE_CACHE_SIZE; fc->bdi.unplug_io_fn = default_unplug_io_fn; |
