Re: Re: scsi-mq + open-iscsi support patches..?

Hi all， I used target-pending/scsi-mq to test intel ahci，but it can't work.I modify some places, now it can work.But still met hung task or oops. Who can receive my patch for that? Thanks! Jianpeng Ma >On Sat, 2013-11-02 at 16:10 +, Jayamohan Kallickal wrote: > > > >> >> On a related

Re: Re: [PATCH 3/3] md/raid5: For stripe with R5_ReadNoMerge, we replace REQ_FLUSH with REQ_NOMERGE.

>On Wed, 30 Oct 2013 10:41:46 +0800 majianpeng wrote: > >> For R5_ReadNoMerge,it mean this bio can't merge with other bios or >> request.It used REQ_FLUSH to achieve this. But REQ_NOMERGE can do the >> same work. >> >> Signed-off-by: Jianpeng Ma >> --- >> drivers/md/raid5.c | 2 +- >> 1 file ch

Re: Re: O_DIRECT to md raid 6 is slow

On 2012-08-15 09:12 Andy Lutomirski Wrote: >Ubuntu's 3.2.0-27-generic. I can test on a newer kernel tomorrow. I guess maybe miss the blk_plug function. Can you add this patch and retest. Move unplugging for direct I/O from around ->direct_IO() down to do_blockdev_direct_IO(). This implicitly add

Re: O_DIRECT to md raid 6 is slow

On 2012-08-15 08:49 Andy Lutomirski Wrote: >If I do: ># dd if=/dev/zero of=/dev/md0p1 bs=8M >then iostat -m 5 says: > >avg-cpu: %user %nice %system %iowait %steal %idle > 0.000.00 26.88 35.270.00 37.85 > >Device:tpsMB_read/sMB_wrtn/sMB_read