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(parent: 6ac10a6) | patch
btrfs: preallocate compression workspaces
authorDavid Sterba <dsterba@suse.com>
Wed, 27 Apr 2016 00:55:15 +0000 (02:55 +0200)
committerDavid Sterba <dsterba@suse.com>
Tue, 10 May 2016 07:46:11 +0000 (09:46 +0200)
commitf77dd0d6b2f0f2cf290cacbd48f5eee18586e52b
tree07b4e749c8d70ed68fbe2b5ec5e7930af2abb687tree | snapshot (tar.gz zip)
parent6ac10a6ac2b11ada24580cc76dcd0c182061c576commit | diff
btrfs: preallocate compression workspaces

Preallocate one workspace for each compression type so we can guarantee
forward progress in the worst case. A failure cannot be a hard error as
we might not use compression at all on the filesystem. If we can't
allocate the workspaces later when need them, it might actually
deadlock, but in such situation the system has effectively not enough
memory to operate properly.

Signed-off-by: David Sterba <dsterba@suse.com>
fs/btrfs/compression.c diff | blob | blame | history