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| author | Eric Sandeen <sandeen@redhat.com> | 2009-12-23 13:57:07 +0100 |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2009-12-23 13:57:07 +0100 |
| commit | 17bd55d037a02b04d9119511cfd1a4b985d20f63 (patch) | |
| tree | ddbc227fffb84d1b95f5f8c48b627f88f3fd56ed /Documentation/hw_random.txt | |
| parent | ext4: Eliminate potential double free on error path (diff) | |
| download | linux-17bd55d037a02b04d9119511cfd1a4b985d20f63.tar.xz linux-17bd55d037a02b04d9119511cfd1a4b985d20f63.zip | |
fs-writeback: Add helper function to start writeback if idle
ext4, at least, would like to start pushing on writeback if it starts
to get close to ENOSPC when reserving worst-case blocks for delalloc
writes. Writing out delalloc data will convert those worst-case
predictions into usually smaller actual usage, freeing up space
before we hit ENOSPC based on this speculation.
Thanks to Jens for the suggestion for the helper function,
& the naming help.
I've made the helper return status on whether writeback was
started even though I don't plan to use it in the ext4 patch;
it seems like it would be potentially useful to test this
in some cases.
Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Acked-by: Jan Kara <jack@suse.cz>
Diffstat (limited to 'Documentation/hw_random.txt')
0 files changed, 0 insertions, 0 deletions