VDEV_REQ_FUA should be mapped to REQ_FUA

Pre-2.6.37 kernels support REQ_FUA in request flags, but not in BIO flags. zvols are the only consumer of VDEV_REQ_FUA and since they are passed requests, they should be obey the REQ_FUA flag like later kernels. This optimization will only matter on 2.6.36 and 2.6.37 because the zvol rework changes things to use bio, where we no longer are able to distinguish on earlier kernels Signed-off-by: Richard Yao <[email protected]>
tomgarcia · Sep 11, 2015 · 08a61cb · 08a61cb
1 parent 7c3e992
commit 08a61cb
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/include/linux/blkdev_compat.h b/include/linux/blkdev_compat.h
@@ -458,7 +458,7 @@ bio_set_flags_failfast(struct block_device *bdev, int *flags)
 #else
 #define	VDEV_WRITE_FLUSH_FUA		WRITE_BARRIER
 #define	VDEV_REQ_FLUSH			REQ_HARDBARRIER
-#define	VDEV_REQ_FUA			REQ_HARDBARRIER
+#define	VDEV_REQ_FUA			REQ_FUA
 #endif
 
 /*