Btrfs: don't use highmem for free space cache pages

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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>

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This commit is contained in:

Chris Mason 2015-04-06 07:48:20 -07:00

parent c9dc4c6578

commit 2b10826800

1 changed files with 5 additions and 7 deletions

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fs/btrfs/free-space-cache.c

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