From: Jens Axboe <axboe@fb.com>
To: Jeff Moyer <jmoyer@redhat.com>
Cc: Shaohua Li <shli@fb.com>, <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] blk: don't account discard request size
Date: Wed, 13 May 2015 11:22:46 -0400 [thread overview]
Message-ID: <55536C46.4020304@fb.com> (raw)
In-Reply-To: <x49617w5xpa.fsf@segfault.boston.devel.redhat.com>
On 05/13/2015 11:00 AM, Jeff Moyer wrote:
> Jens Axboe <axboe@fb.com> writes:
>
>> That would be better. But I'm still not sure we want to turn off
>> accounting for discards. For the mixed write/discard cases it's
>> definitely confusing. The better option would be to account it as a
>> discard and not a write. Preferably in a way that would not break
>> existing tools, but so that they could get updated to support it.
>
> Are you suggesting adding a few fields to the end of diskstats or adding
> a new proc file altogether? (or something else?)
I didn't suggest any specific solution. Obviously it'd be nice if we
could just extend diskstats, but that might break userland. Worth
checking up on.
--
Jens Axboe
next prev parent reply other threads:[~2015-05-13 15:27 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-05-12 21:46 [PATCH] blk: don't account discard request size Shaohua Li
2015-05-13 13:10 ` Jeff Moyer
2015-05-13 14:20 ` Jens Axboe
2015-05-13 15:00 ` Jeff Moyer
2015-05-13 15:22 ` Jens Axboe [this message]
2015-05-13 15:48 ` Jeff Moyer
2015-05-13 15:22 ` Shaohua Li
2015-05-13 15:32 ` Jens Axboe
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