The patch titled
SYNC_FILE_RANGE_WRITE may and will block. Document that.
has been added to the -mm tree. Its filename is
sync_file_range_write-may-and-will-block-document-that.patch
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The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/
------------------------------------------------------
Subject: SYNC_FILE_RANGE_WRITE may and will block. Document that.
From: Pavel Machek <pavel@xxxxxxx>
Signed-off-by: Pavel Machek <pavel@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
fs/sync.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff -puN fs/sync.c~sync_file_range_write-may-and-will-block-document-that fs/sync.c
--- a/fs/sync.c~sync_file_range_write-may-and-will-block-document-that
+++ a/fs/sync.c
@@ -139,7 +139,8 @@ asmlinkage long sys_fdatasync(unsigned i
* 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. Notice that even this this
+ * may and will block if you attempt to write more than request queue size.
*
* SYNC_FILE_RANGE_WAIT_AFTER: wait upon writeout of all pages in the range
* after performing the write.
_
Patches currently in -mm which might be from pavel@xxxxxxx are
linux-next.patch
aperture_64c-corner-case-wrong.patch
sync_file_range_write-may-and-will-block-document-that.patch
swsusp-provide-users-with-a-hint-about-the-no_console_suspend-option.patch
swsusp-provide-users-with-a-hint-about-the-no_console_suspend-option-fix.patch
pm-boot-time-suspend-selftest.patch
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