From: Hitoshi Mitake <mitake.hitoshi@gmail.com>
To: stgt@vger.kernel.org
Cc: sheepdog@lists.wpkg.org,
Hitoshi Mitake <mitake.hitoshi@gmail.com>,
Hitoshi Mitake <mitake.hitoshi@lab.ntt.co.jp>
Subject: [PATCH 1/3] sheepdog: turn on cache flag of write request
Date: Sun, 6 Jul 2014 23:30:30 +0900 [thread overview]
Message-ID: <1404657032-17629-2-git-send-email-mitake.hitoshi@gmail.com> (raw)
In-Reply-To: <1404657032-17629-1-git-send-email-mitake.hitoshi@gmail.com>
tgtd doesn't affect semantics of caching, so we can always turn on
cache feature of sheepdog layer.
Signed-off-by: Hitoshi Mitake <mitake.hitoshi@lab.ntt.co.jp>
---
usr/bs_sheepdog.c | 8 +++++++-
1 file changed, 7 insertions(+), 1 deletion(-)
diff --git a/usr/bs_sheepdog.c b/usr/bs_sheepdog.c
index 6d60bd6..a333675 100644
--- a/usr/bs_sheepdog.c
+++ b/usr/bs_sheepdog.c
@@ -795,13 +795,19 @@ retry:
old_oid = 0;
if (write) {
+ /*
+ * tgt doesn't affect semantics of caching, so we can
+ * always turn on cache of sheep layer
+ */
+ flags = SD_FLAG_CMD_CACHE;
+
if (ai->inode.data_vdi_id[idx] != vid) {
create = 1;
if (ai->inode.data_vdi_id[idx]) {
/* COW */
old_oid = oid;
- flags = SD_FLAG_CMD_COW;
+ flags |= SD_FLAG_CMD_COW;
}
oid = vid_to_data_oid(ai->inode.vdi_id, idx);
--
1.9.1
next prev parent reply other threads:[~2014-07-06 14:30 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-07-06 14:30 [PATCH 0/3] various update for sheepdog driver Hitoshi Mitake
2014-07-06 14:28 ` FUJITA Tomonori
2014-07-06 14:30 ` Hitoshi Mitake [this message]
2014-07-06 14:30 ` [PATCH 2/3] sheepdog: update layout of inode object header Hitoshi Mitake
2014-07-06 14:30 ` [PATCH 3/3] sheepdog: add documentation Hitoshi Mitake
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