ext4: make the preallocation size be a multiple of stripe size

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Previously, if a stripe width was provided, then it would be used
as the preallocation granularity, with no santiy checking and no
way to override this. Now, mb_prealloc_size defaults to the smallest
multiple of stripe size that is greater than or equal to the old
default mb_prealloc_size, and this can be overridden with the sysfs
interface.

Signed-off-by: Dan Ehrenberg <dehrenberg@google.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>

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Dan Ehrenberg 2011-07-17 21:11:30 -04:00 • committed by Theodore Ts'o

parent 265c6a0f92

commit d7a1fee135

1 changed files with 20 additions and 9 deletions

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fs/ext4/mballoc.c

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