linux-kernel - Re: [PATCH v3] selftests/zram: Adding zram tests

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Date:	Thu, 27 Aug 2015 12:10:16 -0600
From:	Shuah Khan <shuahkh@....samsung.com>
To:	naresh.kamboju@...aro.org, linux-kernel@...r.kernel.org
Cc:	tyler.baker@...aro.org, milosz.wasilewski@...aro.org,
	alexey.kodanev@...cle.com, Shuah Khan <shuahkh@....samsung.com>
Subject: Re: [PATCH v3] selftests/zram: Adding zram tests

On 08/18/2015 01:01 AM, naresh.kamboju@...aro.org wrote:
> From: Naresh Kamboju <naresh.kamboju@...aro.org>
> 
> zram: Compressed RAM based block devices
> ----------------------------------------
> The zram module creates RAM based block devices named /dev/zram<id>
> (<id> = 0, 1, ...). Pages written to these disks are compressed and stored
> in memory itself. These disks allow very fast I/O and compression provides
> good amounts of memory savings. Some of the usecases include /tmp storage,
> use as swap disks, various caches under /var and maybe many more :)
> 
> Statistics for individual zram devices are exported through sysfs nodes at
> /sys/block/zram<id>/
> 
> This patch is to validate the zram functionality. Test interacts with block
> device /dev/zram<id> and sysfs nodes /sys/block/zram<id>/
> 

Hi Naresh,

This doesn't fail gracefully when a regular user runs it. Please add
a check for root and make the test fail gracefully when a non-root
user runs it.

Please refer to tools/testing/selftests/efivarfs/efivarfs.sh
for an example on how to check for root.

I was getting ready to apply this to linux-kselftest next for 4.3
and ran some sanity tests. If you get me new revision quickly
I can get it into 4.3-rc1.

thanks,
-- Shuah

-- 
Shuah Khan
Sr. Linux Kernel Developer
Open Source Innovation Group
Samsung Research America (Silicon Valley)
shuahkh@....samsung.com | (970) 217-8978
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