fuse: limit queued background requests

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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>

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Miklos Szeredi 2008-02-06 01:38:39 -08:00 • committed by Linus Torvalds

parent b57d426445

commit d12def1bcb

3 changed files with 74 additions and 46 deletions

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113

fs/fuse/dev.c

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6

fs/fuse/fuse_i.h

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1

fs/fuse/inode.c

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