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authorTheodore Ts'o <tytso@mit.edu>2013-04-20 19:58:37 -0400
committerTheodore Ts'o <tytso@mit.edu>2013-04-20 19:58:37 -0400
commit877f962c5edacfef60ab21cfed6d8d54ce25b8a6 (patch)
tree298d7667d0d66b06a4314a9df1c67fd188d66dba /fs
parent9f203507ed277ee86e3f76a15e09db1c92e40b94 (diff)
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buffer: add BH_Prio and BH_Meta flags
Add buffer_head flags so that buffer cache writebacks can be marked with the the appropriate request flags, so that metadata blocks can be marked appropriately in blktrace. Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Diffstat (limited to 'fs')
-rw-r--r--fs/buffer.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/fs/buffer.c b/fs/buffer.c
index b4dcb34c963..a15575c0b9e 100644
--- a/fs/buffer.c
+++ b/fs/buffer.c
@@ -2988,6 +2988,11 @@ int submit_bh(int rw, struct buffer_head * bh)
/* Take care of bh's that straddle the end of the device */
guard_bh_eod(rw, bio, bh);
+ if (buffer_meta(bh))
+ rw |= REQ_META;
+ if (buffer_prio(bh))
+ rw |= REQ_PRIO;
+
bio_get(bio);
submit_bio(rw, bio);