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authorJens Axboe <jens.axboe@oracle.com>2009-04-06 14:48:02 +0200
committerLinus Torvalds <torvalds@linux-foundation.org>2009-04-06 08:04:53 -0700
commita1f242524c3c1f5d40f1c9c343427e34d1aadd6e (patch)
tree53d085bd25792ab45dafbd4ab1dc537c6ab8e467
parent1faa16d22877f4839bd433547d770c676d1d964c (diff)
Add WRITE_SYNC_PLUG and SWRITE_SYNC_PLUG
(S)WRITE_SYNC always unplugs the device right after IO submission. Sometimes we want to build up a queue before doing so, so add variants that explicitly DON'T unplug the queue. The caller must then do that after submitting all the IO. Signed-off-by: Jens Axboe <jens.axboe@oracle.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r--include/linux/fs.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/include/linux/fs.h b/include/linux/fs.h
index a09e17c8f5f..ea0510978f7 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -96,7 +96,10 @@ struct inodes_stat_t {
#define READ_SYNC (READ | (1 << BIO_RW_SYNCIO) | (1 << BIO_RW_UNPLUG))
#define READ_META (READ | (1 << BIO_RW_META))
#define WRITE_SYNC (WRITE | (1 << BIO_RW_SYNCIO) | (1 << BIO_RW_UNPLUG))
+#define WRITE_SYNC_PLUG (WRITE | (1 << BIO_RW_SYNCIO))
#define SWRITE_SYNC (SWRITE | (1 << BIO_RW_SYNCIO) | (1 << BIO_RW_UNPLUG))
+#define SWRITE_SYNC_PLUG \
+ (SWRITE | (1 << BIO_RW_SYNCIO))
#define WRITE_BARRIER (WRITE | (1 << BIO_RW_BARRIER))
#define DISCARD_NOBARRIER (1 << BIO_RW_DISCARD)
#define DISCARD_BARRIER ((1 << BIO_RW_DISCARD) | (1 << BIO_RW_BARRIER))