Btrfs: don't preallocate metadata blocks during btrfs_search_slot

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In order to avoid doing expensive extent management with tree locks held,
btrfs_search_slot will preallocate tree blocks for use by COW without
any tree locks held.

A later commit moves all of the extent allocation work for COW into
a delayed update mechanism, and this preallocation will no longer be
required.

Signed-off-by: Chris Mason <chris.mason@oracle.com>

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This commit is contained in:

Chris Mason 2009-03-13 10:24:59 -04:00

parent 8e0ee43bc2

commit 9fa8cfe706

3 changed files with 21 additions and 85 deletions

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100

fs/btrfs/ctree.c

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2

fs/btrfs/ctree.h

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4

fs/btrfs/transaction.c

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