ext4: Make the length of the mb_history file tunable

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In memory-constrained systems with many partitions, the ~68K for each
partition for the mb_history buffer can be excessive.

This patch adds a new mount option, mb_history_length, as well as a
way of setting the default via a module parameter (or via a sysfs
parameter in /sys/module/ext4/parameter/default_mb_history_length).
If the mb_history_length is set to zero, the mb_history facility is
disabled entirely.

Signed-off-by: Curt Wohlgemuth <curtw@google.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>

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This commit is contained in:

Curt Wohlgemuth 2009-05-01 20:27:20 -04:00 • committed by Theodore Ts'o

parent bb23c20a85

commit f40339031b

2 changed files with 24 additions and 7 deletions

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13

fs/ext4/mballoc.c

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18

fs/ext4/super.c

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