From mboxrd@z Thu Jan  1 00:00:00 1970
From: "kyle" <kylewong@southa.com>
Subject: Re: change strip_cache_size freeze the whole raid
Date: Mon, 22 Jan 2007 23:13:34 +0800
Message-ID: <00ad01c73e37$e60c2ef0$28df0f3d@kylecea1512a3f>
References: <001801c73e14$c3177170$28df0f3d@kylecea1512a3f> <Pine.LNX.4.64.0701220717200.30260@p34.internal.lan> <45B4D0ED.7030500@maine.edu>
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To: Steve Cousins <steve.cousins@maine.edu>, Justin Piszcz <jpiszcz@lucidpixels.com>
Cc: linux-raid@vger.kernel.org, linux-kernel@vger.kernel.org
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> Justin Piszcz wrote:
>> Yes, I noticed this bug too, if you change it too many times or change it 
>> at the 'wrong' time, it hangs up when you echo numbr > 
>> /proc/stripe_cache_size.
>>
>> Basically don't run it more than once and don't run it at the 'wrong' 
>> time and it works.  Not sure where the bug lies, but yeah I've seen that 
>> on 3 different machines!
>
> Can you tell us when the "right" time is or maybe what the "wrong" time 
> is?  Also, is this kernel specific?  Does it (increasing 
> stripe_cache_size) work with RAID6 too?
>
> Thanks,
>
> Steve

I think if your /sys/block/md_your_raid6/md/ have a file 
"stripe_cache_size", then it should works with raid6 too.

Kyle