From: keith.busch@intel.com (Keith Busch)
Subject: Weirdness with discard cmd and get log pages
Date: Thu, 13 Oct 2016 19:18:09 -0400 [thread overview]
Message-ID: <20161013231808.GG17823@localhost.localdomain> (raw)
In-Reply-To: <CAG3=cOmGVdQXDvNuzeW2hgfYi7nASGvfgirU__hE5VJnSWue4w@mail.gmail.com>
On Thu, Oct 13, 2016@11:18:43AM -0700, Nisha Miller wrote:
> Yes, that is what I noticed too. I used the nvme-cli command like this:
>
> nvme dsm /dev/nvme0n1 -a 0,0,0,0 --blocks=4,5,6,7 --slbs=100,200,300,400 --ad
>
> This turns up as nvme_user_cmd in the driver, which calls
> nvme_map_user_pages to setup the SG list.
Okay, that's what I use too. I'm not observing any issues on a 4.8 kernel
or back to 4.4 either. I've not tested 3.19 though, and the mechanism
it uses to map user buffers is completely different. Could you verify if
your observation exists in a more current stable release?
next prev parent reply other threads:[~2016-10-13 23:18 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-10-13 15:46 Weirdness with discard cmd and get log pages Nisha Miller
2016-10-13 16:15 ` Keith Busch
2016-10-13 18:18 ` Nisha Miller
2016-10-13 23:18 ` Keith Busch [this message]
2016-10-14 17:44 ` Keith Busch
2016-10-14 21:33 ` Nisha Miller
2016-10-14 23:19 ` Keith Busch
2016-10-18 16:55 ` Nisha Miller
2016-10-18 17:08 ` Keith Busch
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