From: Jens Axboe <axboe@fb.com>
To: <linux-kernel@vger.kernel.org>, <linux-fsdevel@vger.kernel.org>,
<linux-block@vger.kernel.org>
Cc: Jens Axboe <axboe@fb.com>
Subject: [PATCH 5/6] NVMe: inform block layer of write cache state
Date: Tue, 22 Mar 2016 11:55:19 -0600 [thread overview]
Message-ID: <1458669320-6819-6-git-send-email-axboe@fb.com> (raw)
In-Reply-To: <1458669320-6819-1-git-send-email-axboe@fb.com>
This isn't quite correct, since the VWC merely states if a potential
write back cache is volatile or not. But for the purpose of write
absortion, it's good enough.
Signed-off-by: Jens Axboe <axboe@fb.com>
---
drivers/nvme/host/core.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c
index 643f457131c2..05c8edfb7611 100644
--- a/drivers/nvme/host/core.c
+++ b/drivers/nvme/host/core.c
@@ -906,6 +906,7 @@ static void nvme_set_queue_limits(struct nvme_ctrl *ctrl,
if (ctrl->vwc & NVME_CTRL_VWC_PRESENT)
blk_queue_flush(q, REQ_FLUSH | REQ_FUA);
blk_queue_virt_boundary(q, ctrl->page_size - 1);
+ blk_queue_write_cache(q, ctrl->vwc & NVME_CTRL_VWC_PRESENT);
}
/*
--
2.4.1.168.g1ea28e1
next prev parent reply other threads:[~2016-03-22 17:55 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-03-22 17:55 [PATCHSET][RFC] Make background writeback not suck Jens Axboe
2016-03-22 17:55 ` [PATCH 1/6] block: ensure we don't truncate top bits of the request command flags Jens Axboe
2016-03-22 18:59 ` Christoph Hellwig
2016-03-22 19:01 ` Jens Axboe
2016-03-25 2:08 ` Mike Christie
2016-03-25 4:18 ` Jens Axboe
2016-03-22 17:55 ` [PATCH 2/6] writeback: wb_start_writeback() should use WB_SYNC_ALL for WB_REASON_SYNC Jens Axboe
2016-03-22 21:34 ` Dave Chinner
2016-03-22 21:40 ` Jens Axboe
2016-03-22 21:51 ` Jens Axboe
2016-03-22 22:04 ` Dave Chinner
2016-03-22 22:07 ` Jens Axboe
2016-03-22 17:55 ` [PATCH 3/6] block: add ability to flag write back caching on a device Jens Axboe
2016-03-22 18:57 ` Christoph Hellwig
2016-03-22 18:59 ` Jens Axboe
2016-03-22 17:55 ` [PATCH 4/6] sd: inform block layer of write cache state Jens Axboe
2016-03-22 17:55 ` Jens Axboe [this message]
2016-03-22 17:55 ` [PATCH 6/6] writeback: throttle buffered writeback Jens Axboe
2016-03-22 20:12 ` Jeff Moyer
2016-03-22 20:19 ` Jens Axboe
2016-03-22 20:27 ` Jeff Moyer
2016-03-22 21:30 ` Shaohua Li
2016-03-22 21:35 ` Jens Axboe
2016-03-22 21:51 ` [PATCHSET][RFC] Make background writeback not suck Dave Chinner
2016-03-22 22:03 ` Jens Axboe
2016-03-22 22:31 ` Dave Chinner
2016-03-22 22:57 ` Jens Axboe
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