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| author | David Sterba <dsterba@suse.com> | 2017-05-31 17:14:56 +0200 |
|---|---|---|
| committer | David Sterba <dsterba@suse.com> | 2017-06-19 18:26:02 +0200 |
| commit | fe30853307559c3ec237391507c2b395095aa151 (patch) | |
| tree | 9e996f1c131b3acba6b2a745be86094134c3a4ec /fs/btrfs/zlib.c | |
| parent | btrfs: adjust includes after vmalloc removal (diff) | |
| download | linux-fe30853307559c3ec237391507c2b395095aa151.tar.xz linux-fe30853307559c3ec237391507c2b395095aa151.zip | |
btrfs: add memalloc_nofs protections around alloc_workspace callback
The workspaces are preallocated at the beginning where we can safely use
GFP_KERNEL, but in some cases the find_workspace might reach the
allocation again, now in a more restricted context when the bios or
pages are being compressed.
To avoid potential lockup when alloc_workspace -> vmalloc would silently
use the GFP_KERNEL, add the memalloc_nofs helpers around the critical
call site.
Reviewed-by: Anand Jain <anand.jain@oracle.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Diffstat (limited to 'fs/btrfs/zlib.c')
0 files changed, 0 insertions, 0 deletions