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| author | Pavel Machek <pavel@suse.cz> | 2008-07-23 21:27:36 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2008-07-24 10:47:17 -0700 |
| commit | cce770815869e9209171d819dfde89bcc738ab62 (patch) | |
| tree | 1a78a7d57ae8c429df15bed31275a3424b305eb5 /fs/sync.c | |
| parent | bcd78e49613c41b5bed96fa288e983876f286a59 (diff) | |
| download | lwn-cce770815869e9209171d819dfde89bcc738ab62.tar.gz lwn-cce770815869e9209171d819dfde89bcc738ab62.zip | |
SYNC_FILE_RANGE_WRITE may and will block. Document that.
[akpm@linux-foundation.org: fix comment text]
Signed-off-by: Pavel Machek <pavel@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/sync.c')
| -rw-r--r-- | fs/sync.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/fs/sync.c b/fs/sync.c index 228e17b5e9ee..2967562d416f 100644 --- a/fs/sync.c +++ b/fs/sync.c @@ -139,7 +139,8 @@ asmlinkage long sys_fdatasync(unsigned int fd) * before performing the write. * * SYNC_FILE_RANGE_WRITE: initiate writeout of all those dirty pages in the - * range which are not presently under writeback. + * range which are not presently under writeback. Note that this may block for + * significant periods due to exhaustion of disk request structures. * * SYNC_FILE_RANGE_WAIT_AFTER: wait upon writeout of all pages in the range * after performing the write. |