linux-kernel - [PATCH v2 12/17] pmem: flag pmem block devices as non-rotational

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Message-ID: <20150625093722.40066.10804.stgit@dwillia2-desk3.jf.intel.com>
Date:	Thu, 25 Jun 2015 05:37:22 -0400
From:	Dan Williams <dan.j.williams@...el.com>
To:	linux-nvdimm@...ts.01.org
Cc:	axboe@...nel.dk, boaz@...xistor.com, toshi.kani@...com,
	Vishal Verma <vishal.l.verma@...ux.intel.com>,
	linux-kernel@...r.kernel.org, mingo@...nel.org,
	linux-acpi@...r.kernel.org, linux-fsdevel@...r.kernel.org,
	hch@....de
Subject: [PATCH v2 12/17] pmem: flag pmem block devices as non-rotational

...since they are effectively SSDs as far as userspace is concerned.

Reviewed-by: Vishal Verma <vishal.l.verma@...ux.intel.com>
Signed-off-by: Dan Williams <dan.j.williams@...el.com>
---
 drivers/nvdimm/pmem.c |    1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/nvdimm/pmem.c b/drivers/nvdimm/pmem.c
index 09195e3b7453..a9709db0704c 100644
--- a/drivers/nvdimm/pmem.c
+++ b/drivers/nvdimm/pmem.c
@@ -158,6 +158,7 @@ static int pmem_attach_disk(struct nd_namespace_common *ndns,
 	blk_queue_make_request(pmem->pmem_queue, pmem_make_request);
 	blk_queue_max_hw_sectors(pmem->pmem_queue, UINT_MAX);
 	blk_queue_bounce_limit(pmem->pmem_queue, BLK_BOUNCE_ANY);
+	queue_flag_set_unlocked(QUEUE_FLAG_NONROT, pmem->pmem_queue);
 
 	disk = alloc_disk(0);
 	if (!disk) {

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