On Wed, 23 May 2012 20:18:06 -0500 Stan Hoeppner <stan@xxxxxxxxxxxxxxxxx> wrote: > On 5/23/2012 6:46 PM, Stan Hoeppner wrote: > > On 5/23/2012 2:49 PM, David Brown wrote: > > > >> It looks like Shaohua Li has done some testing, found that there is a > >> slow-down even with just 2 or 4 disks, and has written patches to fix it > >> (for raid1 and raid10 so far), which is very nice. > > > > Ahh, thanks David. I wasn't aware of Shaohua Li's > > work on this. Got a link to his documentation and patches, or article, > > by chance? > > My Google searches only turn up Shaohua Li's TRIM patches. I don't > believe the issue we're discussing has anything to do with TRIM, though > I can't be 100% sure as Mark didn't provide much detail of his thread > ceiling problem, and I don't have a suitable system to do proper testing. > > Again it would be nice to have a link to Shaohua Li's work to which you > refer to determine if it's applicable to this issue. > It's probably in your INBOX. http://www.spinics.net/lists/raid/msg38899.html NeilBrown
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