----- Original Message ----- > From: "Christoph Hellwig" <hch@xxxxxx> > To: "Bart Van Assche" <bart.vanassche@xxxxxxxxxxx> > Cc: "Christoph Hellwig" <hch@xxxxxx>, "Doug Ledford" <dledford@xxxxxxxxxx>, "Sagi Grimberg" <sagi@xxxxxxxxxxx>, > "Laurence Oberman" <loberman@xxxxxxxxxx>, linux-rdma@xxxxxxxxxxxxxxx > Sent: Thursday, May 5, 2016 10:06:16 AM > Subject: Re: [PATCH 11/11] IB/srp: Prevent mapping failures > > On Wed, May 04, 2016 at 04:44:53PM -0700, Bart Van Assche wrote: > > > FYI, even with this patch I see tons of errors like: > > > > > > [ 2237.161106] scsi host7: ib_srp: Failed to map data (-12) > > > > Hello Christoph, > > > > The patch below makes these messages disappear on my setup. Are > > you OK with including this change in patch 11/11? > > Looks fine to me. > > Btw, while we're at it - any chance you could move the fixes before > the cleanups in the series so that they are more easily backportabke to > -stable? > -- > To unsubscribe from this list: send the line "unsubscribe linux-rdma" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html > I added and tested this patch. I left the warn message in as I need it. [root@srptest ~]# dmesg | grep Reducing [ 551.526015] scsi host4: ib_srp: Reducing max_sectors from 8192 to 4080 [ 559.367609] scsi host5: ib_srp: Reducing max_sectors from 8192 to 4080 [ 570.449121] scsi host5: ib_srp: Reducing max_sectors from 8192 to 4080 [ 577.831703] scsi host6: ib_srp: Reducing max_sectors from 8192 to 4080 Its stable but only because we constrain the max_sectors. I am writing 4MB buffered to 10 file systems (ext3) however the max_sectors is constrained to 2040k and its stable. I have been told that RHEL6 and the Mofed stack happily does 4MB buffered I/O with mapping failures but I need to check that out. That would make no sense to me unless the Mofed stack has code that differs enough to what we have upstream to make a difference. I am about to install RHEL6 and Mofed to compare and see what happens with 4MB buffered. Tested-by Laurence Oberman <loberman@xxxxxxxxxx> -- To unsubscribe from this list: send the line "unsubscribe linux-rdma" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
