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Message-Id: <1404231410-29852-11-git-send-email-philipp.reisner@linbit.com> Date: Tue, 1 Jul 2014 18:16:40 +0200 From: Philipp Reisner <philipp.reisner@...bit.com> To: linux-kernel@...r.kernel.org, Jens Axboe <axboe@...nel.dk> Cc: drbd-dev@...ts.linbit.com Subject: [PATCH 10/20] drbd: short-circuit in maybe_pull_ahead From: Lars Ellenberg <lars.ellenberg@...bit.com> If we already "pulled ahead", we can short-circuit, and avoid logging the same messages over and over again. Signed-off-by: Philipp Reisner <philipp.reisner@...bit.com> Signed-off-by: Lars Ellenberg <lars.ellenberg@...bit.com> --- drivers/block/drbd/drbd_req.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/block/drbd/drbd_req.c b/drivers/block/drbd/drbd_req.c index f07a724..3824d5c 100644 --- a/drivers/block/drbd/drbd_req.c +++ b/drivers/block/drbd/drbd_req.c @@ -899,6 +899,9 @@ static void maybe_pull_ahead(struct drbd_device *device) connection->agreed_pro_version < 96) return; + if (on_congestion == OC_PULL_AHEAD && device->state.conn == C_AHEAD) + return; /* nothing to do ... */ + /* If I don't even have good local storage, we can not reasonably try * to pull ahead of the peer. We also need the local reference to make * sure device->act_log is there. -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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