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Date: Thu, 7 Jul 2016 09:54:07 +0200
From: Matias Bjørling <m@...rling.me>
To: linux-block@...r.kernel.org, linux-kernel@...r.kernel.org,
axboe@...com
Cc: Wenwei Tao <ww.tao0320@...il.com>,
Matias Bjørling <m@...rling.me>
Subject: [PATCH 01/17] lightnvm: break the loop when rqd is not null
From: Wenwei Tao <ww.tao0320@...il.com>
Break the loop when rqd is not null to reduce
an unnecessary schedule.
Signed-off-by: Wenwei Tao <ww.tao0320@...il.com>
Signed-off-by: Matias Bjørling <m@...rling.me>
---
drivers/lightnvm/rrpc.c | 7 +++++--
1 file changed, 5 insertions(+), 2 deletions(-)
diff --git a/drivers/lightnvm/rrpc.c b/drivers/lightnvm/rrpc.c
index de86d72..736e669 100644
--- a/drivers/lightnvm/rrpc.c
+++ b/drivers/lightnvm/rrpc.c
@@ -96,10 +96,13 @@ static void rrpc_discard(struct rrpc *rrpc, struct bio *bio)
sector_t len = bio->bi_iter.bi_size / RRPC_EXPOSED_PAGE_SIZE;
struct nvm_rq *rqd;
- do {
+ while (1) {
rqd = rrpc_inflight_laddr_acquire(rrpc, slba, len);
+ if (rqd)
+ break;
+
schedule();
- } while (!rqd);
+ }
if (IS_ERR(rqd)) {
pr_err("rrpc: unable to acquire inflight IO\n");
--
2.1.4
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