From: Minchan Kim <minchan@kernel.org>
To: Harald Glatt <mail@hachre.de>
Cc: linux-mm@kvack.org, Johannes Weiner <hannes@cmpxchg.org>,
KOSAKI Motohiro <kosaki.motohiro@gmail.com>
Subject: Re: scan_unevictable_pages sysctl/node-interface
Date: Tue, 15 May 2012 12:04:44 +0900 [thread overview]
Message-ID: <4FB1C7CC.3000201@kernel.org> (raw)
In-Reply-To: <9EEC7022-38C5-46B8-8825-9FA4E98F6CF6@hachre.de>
On 05/15/2012 07:16 AM, Harald Glatt wrote:
> Hey,
>
> I'm reshaping my raid5 to raid6 in linux 3.3.2 with mdadm 3.2.3 atm and I got this messages in dmesg:
>
> [390496.114687] md: reshape of RAID array md0
> [390496.114692] md: minimum _guaranteed_ speed: 1000 KB/sec/disk.
> [390496.114697] md: using maximum available idle IO bandwidth (but not more than 200000 KB/sec) for reshape.
> [390496.114707] md: using 128k window, over a total of 1465138496k.
> [390751.722771] sysctl: The scan_unevictable_pages sysctl/node-interface has been disabled for lack of a legitimate use case. If you have one, please send an email to linux-mm@kvack.org.
>
> Maybe its a use case I don't know :) Just thought I'd give you a heads up. So far it seems to continue without a problem though!
We have disabled because manual rescue with sysctl is not right approach to recover stranded page on unevictable list.
We don't have received any bug report about stranded pages so that it would be no problem although you remove such sysctl calling totally.
If you see increased nr_unevictable in /proc/vmstat compared to old, then report it to us, please.
>
> Harald
> --
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--
Kind regards,
Minchan Kim
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prev parent reply other threads:[~2012-05-15 3:04 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-05-14 22:16 scan_unevictable_pages sysctl/node-interface Harald Glatt
2012-05-15 3:04 ` Minchan Kim [this message]
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