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Commit cce77081 authored by Pavel Machek's avatar Pavel Machek Committed by Linus Torvalds
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SYNC_FILE_RANGE_WRITE may and will block. Document that. 



[akpm@linux-foundation.org: fix comment text]
Signed-off-by: default avatarPavel Machek <pavel@suse.cz>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent bcd78e49

fs/sync.c

+2 −1
Original line number Diff line number Diff line
@@ -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.