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author | Theodore Ts'o | 2013-06-12 11:43:02 -0400 |
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committer | Theodore Ts'o | 2013-06-12 11:43:02 -0400 |
commit | 2ed5724d5a78a22864ef0bd6af4fcb8a15379f00 (patch) | |
tree | 2518af807533068bc4e3877843188da90947394c /fs/reiserfs | |
parent | 20970ba65d5a22f2e4efbfa100377722fde56935 (diff) |
ext4: add cond_resched() to ext4_free_blocks() & ext4_mb_regular_allocator()
For a file systems with a very large number of block groups, if all of
the block group bitmaps are in memory and the file system is
relatively badly fragmented, it's possible ext4_mb_regular_allocator()
to take a long time trying to find a good match. This is especially
true if the tuning parameter mb_max_to_scan has been sent to a very
large number. So add a cond_resched() to avoid soft lockup warnings
and to provide better system responsiveness.
For ext4_free_blocks(), if we are deleting a large range of blocks,
and data=journal is enabled so that EXT4_FREE_BLOCKS_FORGET is passed,
the loop to call sb_find_get_block() and to call ext4_forget() can
take over 10-15 milliseocnds or more. So it's better to add a
cond_resched() here a well.
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Diffstat (limited to 'fs/reiserfs')
0 files changed, 0 insertions, 0 deletions