linux-kernel - Re: [dm-devel] [PATCH] md/dm-ioctl.c: optimize memory allocation in copy

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Message-ID: <20140722012352.GD6822@agk-dp.fab.redhat.com>
Date:	Tue, 22 Jul 2014 02:23:52 +0100
From:	Alasdair G Kergon <agk@...hat.com>
To:	"Zhang, Yanmin" <yanmin_zhang@...ux.intel.com>
Cc:	Mikulas Patocka <mpatocka@...hat.com>,
	"xinhui.pan" <xinhuix.pan@...el.com>, linux-kernel@...r.kernel.org,
	agk@...hat.com, snitzer@...hat.com, dm-devel@...hat.com,
	"Liu, ShuoX" <shuox.liu@...el.com>
Subject: Re: [dm-devel] [PATCH] md/dm-ioctl.c: optimize memory allocation
	in copy_params

>>> On 2014/7/9 6:39, Mikulas Patocka wrote:
>> Which ioctl with more than 16kB
>> arguments do you use? 

Unanswered.  Let's ask the same question in a different way:

Please supply the output of these three commands on the real-world system on
which you believe that that particular allocation is causing you a problem:
  dmsetup info -c
  dmsetup table
  dmsetup status

Alasdair

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