On Thu, 2014-05-22 at 17:25 -0700, Nicholas A. Bellinger wrote: > Hi Moussa, > > On Thu, 2014-05-22 at 21:35 +0000, Moussa Ba (moussaba) wrote: > <SNIP> > > > > The question I have is where does this information belong and how can > > > > one debug these issues... > > > > > > > > > > FYI, these VAAI primitives can also be disabled target side with device > > > attributes: > > > > > > emulate_caw=0 > > > emulate_3pc=0 > > > max_write_same_len=0 > > > > > > To debug, please try ESX host settings Init=0 + Move=1 + Locking=1 to > > > see if it's specific to WRITE_SAME, and separately if COMPARE_AND_WRITE > > > traffic can also trigger the bug.. > > > > Setting Init=0, Move=1 and Locking=1 does not create the time out > > issue. So so far it seems the issues is specific to WRITE_SAME. I > > will > > > > Great, thanks for the update. > > > > > > > Also, what do the negotiated ImmediateData + InitialR2T parameter > > > settings look like..? > > > > Both are set to yes. I am reading these off of /sys/kernel/config/.../iqn..../param/ > > > > > > OK, I'll verify WRITE_SAME works as expected with the Linux iSER > initiator, and from there it should be clear if it's a bug specific to > ESX iSER initiator code. > Ok, I've verified that WRITE_SAME works as expected using open-iscsi w/ iSER enabled with both ImmediateData=Yes + ImmediateData=No parameter settings. (Output included below..) At this point, it looks pretty clear that it's an ESX iSER initiator bug specific to WRITE_SAME opcodes. Mellanox folks, can you please have a look at this..? --nab # hexdump test 0000000 bbaa ddcc ffee 2211 4433 6655 8877 0099 0000010 0000 0000 0000 0000 0000 0000 0000 0000 # sg_write_same --lba=0 --num=8 --in=test --verbose /dev/sdj # dd if=/dev/sdj of=foo bs=512 count=16 ; hexdump foo 16+0 records in 16+0 records out 8192 bytes (8.2 kB) copied, 0.0197071 s, 416 kB/s 0000000 bbaa ddcc ffee 2211 4433 6655 8877 0099 0000010 0000 0000 0000 0000 0000 0000 0000 0000 * 0000200 bbaa ddcc ffee 2211 4433 6655 8877 0099 0000210 0000 0000 0000 0000 0000 0000 0000 0000 * 0000400 bbaa ddcc ffee 2211 4433 6655 8877 0099 0000410 0000 0000 0000 0000 0000 0000 0000 0000 * 0000600 bbaa ddcc ffee 2211 4433 6655 8877 0099 0000610 0000 0000 0000 0000 0000 0000 0000 0000 * 0000800 bbaa ddcc ffee 2211 4433 6655 8877 0099 0000810 0000 0000 0000 0000 0000 0000 0000 0000 * 0000a00 bbaa ddcc ffee 2211 4433 6655 8877 0099 0000a10 0000 0000 0000 0000 0000 0000 0000 0000 * 0000c00 bbaa ddcc ffee 2211 4433 6655 8877 0099 0000c10 0000 0000 0000 0000 0000 0000 0000 0000 * 0000e00 bbaa ddcc ffee 2211 4433 6655 8877 0099 0000e10 0000 0000 0000 0000 0000 0000 0000 0000 * 0002000 -- To unsubscribe from this list: send the line "unsubscribe target-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
