The working system is running: Linux dracosan 3.5.0-26-generic #42-Ubuntu SMP Fri Mar 8 23:18:20 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux With that said, the hardware is substantially different between the two, in the working system I'm using a QLE2462 (I thought it was a QLA2462 but I just confirmed it's not). Working storage: Arima NM461 board, dual opteron 2214HE, 8x 1GB RAM, QLE2462 HBA, LSI 8888ELP SAS RAID card, Kernel 3.5.0-26 (Ubuntu FUBAR) Crashy storage #1: IBM HS21 (8853) blade, dual Xeon 5148, 4x 1GB RAM, 2x QLA2462 HBA, 4x 1GB RAM, ServeRaid 8k SAS RAID card, IBM BSE3 expander, Kernel 3.19.3-200 (Fedora 21) Crashy storage #2: IBM HS21 (8853) blade, dual Xeon 5148, 4x 1GB RAM, 1x QLA2462 HBA, 4x 1GB RAM, LSI 1064E SAS card, Kernel 4.0.0.rc2 (Fedora 22) (Server was built just for testing) I have a friend running a QLA2462 (PCI-X) in a PowerEdge 2850 successfully, he's going to check it later and see what kernel he's on, all he could remember is that it's Ubuntu. ^^ Thanks! Dan On Tue, Apr 7, 2015 at 5:08 PM, Nicholas A. Bellinger <nab@xxxxxxxxxxxxxxx> wrote: > On Mon, 2015-04-06 at 23:33 -0700, Christoph Hellwig wrote: >> Hi Dan, >> >> it seems like the MISCOMPARE case of COMPARE AND WRITE has been broken >> for quite a while. >> >> See my post from March 30 ("hang during COMPARE AND SWAP", which shows a >> similar issues using a synthetic test suite. > > Not exactly. The one you reported earlier is a bug specific to loopback > and vhost with COMPARE_AND_WRITE, and AFAICT has always been broken. > I'm working on a patch for that now.. > > From what I can gather from Dan's log with qla2xxx, a MISCOMPARE occurs > in compare_and_write_callback(), followed up by an ABORT_TASK. This is > not what's happening with loopback. > > Dan, can you confirm which kernel version you where previously using > qla2xxx target mode with Ubuntu 11.04..? > > Thanks, > > --nab > > > > > -- 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