From: m@bjorling.me (Matias Bjorling)
Subject: [PATCH v11] NVMe: Convert to blk-mq
Date: Fri, 15 Aug 2014 12:09:47 +0200 [thread overview]
Message-ID: <53EDDC6B.40007@bjorling.me> (raw)
In-Reply-To: <alpine.LRH.2.03.1408141651300.14603@AMR>
On 08/15/2014 01:09 AM, Keith Busch wrote:
>
> The allocation and freeing of blk-mq parts seems a bit asymmetrical
> to me. The 'tags' belong to the tagset, but any request_queue using
> that tagset may free the tags. I looked to separate the tag allocation
> concerns, but that's more time than I have, so this is my quick-fix
> driver patch, forcing tag access through the hw_ctx.
>
I moved nvmeq->hctx->tags into nvmeq->tags in the last version. I missed
the free's in blk_mq_map_swqueue. Good catch.
The previous method might have another problem. If there's two
namespaces, sharing tag set. The hctx_init fn could be called with
different hctx for an nvmeq, leading to false tag sharing between nvme
queues.
prev parent reply other threads:[~2014-08-15 10:09 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-07-26 9:07 [PATCH v11] Convert NVMe driver to blk-mq Matias Bjørling
2014-07-26 9:07 ` [PATCH v11] NVMe: Convert " Matias Bjørling
2014-08-10 17:27 ` Matias Bjørling
2014-08-13 22:27 ` Keith Busch
2014-08-14 8:25 ` Matias Bjørling
2014-08-14 15:09 ` Jens Axboe
2014-08-14 15:33 ` Keith Busch
2014-08-14 15:39 ` Matias Bjorling
2014-08-14 18:20 ` Keith Busch
2014-08-14 23:09 ` Keith Busch
2014-08-15 10:09 ` Matias Bjorling [this message]
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