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(parent: adf0bce) | patch
Btrfs: don't use highmem for free space cache pages
authorChris Mason <clm@fb.com>
Mon, 6 Apr 2015 14:48:20 +0000 (07:48 -0700)
committerChris Mason <clm@fb.com>
Fri, 10 Apr 2015 21:07:18 +0000 (14:07 -0700)
commit5a24ef62fdbd470b67598d592ba6cb06a7a8887d
tree349dd004791477ef08e430d32fcb91be3ed6ebfftree | snapshot
parentadf0bce628114dbdd2a6cd70830622f5b0c23735commit | diff
Btrfs: don't use highmem for free space cache pages

In order to create the free space cache concurrently with FS modifications,
we need to take a few block group locks.

The cache code also does kmap, which would schedule with the locks held.
Instead of going through kmap_atomic, lets just use lowmem for the cache
pages.

Signed-off-by: Chris Mason <clm@fb.com>
fs/btrfs/free-space-cache.c diff | blob | history
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