Re: dma engine bugs

2013-01-17 Thread Chris Mason
On Thu, Jan 17, 2013 at 07:53:18PM -0700, Dan Williams wrote: > On Thu, Jan 17, 2013 at 6:38 AM, Chris Mason wrote: > > [ Sorry resend with the right address for Dan ] > > > > Hi Dan, > > > > I'm doing some benchmarking on MD raid5/6 on 4 fusionio cards in an HP > > DL380p. I'm doing 128K randomw

Re: dma engine bugs

2013-01-17 Thread Dan Williams
On Thu, Jan 17, 2013 at 6:38 AM, Chris Mason wrote: > [ Sorry resend with the right address for Dan ] > > Hi Dan, > > I'm doing some benchmarking on MD raid5/6 on 4 fusionio cards in an HP > DL380p. I'm doing 128K randomw writes on a 4 drive raid6 with a 64K > stripe size per drive. I have 4 fio

dma engine bugs

2013-01-17 Thread Chris Mason
[ Sorry resend with the right address for Dan ] Hi Dan, I'm doing some benchmarking on MD raid5/6 on 4 fusionio cards in an HP DL380p. I'm doing 128K randomw writes on a 4 drive raid6 with a 64K stripe size per drive. I have 4 fio processes sending down the aio/dio, and a high queue depth (8192

dma engine bugs

2013-01-17 Thread Chris Mason
Hi Dan, I'm doing some benchmarking on MD raid5/6 on 4 fusionio cards in an HP DL380p. I'm doing 128K randomw writes on a 4 drive raid6 with a 64K stripe size per drive. I have 4 fio processes sending down the aio/dio, and a high queue depth (8192). When I bump up the MD raid stripe cache size,