Btrfs: send, lower mem requirements for processing xattrs

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Maximum xattr size can be up to nearly the leaf size. For an fs with a
leaf size larger than the page size, using kmalloc requires allocating
multiple pages that are contiguous, which might not be possible if
there's heavy memory fragmentation. Therefore fallback to vmalloc if
we fail to allocate with kmalloc. Also start with a smaller buffer size,
since xattr values typically are smaller than a page.

Reported-by: Chris Murphy <lists@colorremedies.com>
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Signed-off-by: Chris Mason <clm@fb.com>

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Filipe Manana 2014-08-20 10:45:45 +01:00 • committed by Chris Mason

parent f87c4318af

commit 4395e0c4da

1 changed files with 32 additions and 8 deletions

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fs/btrfs/send.c

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