On Tue, 2008-12-09 at 14:04 +0300, Vladislav Bolkhovitin wrote: > Gal Rosen wrote: > > Ok, now the picture is more clear. > > It happened only with the virtual ports. > > With physical port and LUNs that defined with write cache enable rmmod > > succeeded, and on the messages file I see: > > [57972.480234] sd 40:0:0:1: [sdb] Synchronizing SCSI cache > > [57972.530263] sd 40:0:0:1: [sdb] Result: hostbyte=DID_NO_CONNECT > > driverbyte=DRIVER_OK,SUGGEST_OK > > > > While with virtual port I see only: > > [57972.480234] sd 40:0:0:1: [sdb] Synchronizing SCSI cache > > and never get the Result. > > > > Anyone has an idea? > > I can guess that the remote device was disconnected before > SYNCHRONIZE_CACHE command was sent to it, so it either doesn't go to > anywhere, or goes to nowhere. Then SCSI mid-layer is waiting for it to > finish, maybe, infinitely (unlikely) or until some timeout. > That's right I see that blk_execute_rq() put the SCSI command SYNCHRONIZE_CACHE on queue and then wait_for_completion but the request never return. But why it is happened on the IBM with the LSI controller and not happening with CLARiiON ? Gal. > > Thanks, > > Gal. > > > > On Mon, 2008-12-08 at 19:48 +0200, Gal Rosen wrote: > >> On Mon, 2008-12-08 at 09:23 -0800, Seokmann Ju wrote: > >>> On Dec 8, 2008, at 3:33 AM, Gal Rosen wrote: > >>> > >>>> Hi, > >>>> > >>>> I am working against IBM Total Storage DS4000 with LSI INF-01-00 Rev: > >>>> 0534 controller. First I don't understand why this controller > >>>> present 32 > >>>> access LUNs instead of one. > >>>> > >>>> But my main issue is when I create virtual port and then try to rmmod > >>>> the qlogic driver, it stuck. I must say that I made changes to the > >>>> qlogic driver which add possibility to create virtual port in FC-AL > >>>> topology. The base driver is from kernel 2.6.26.2. > >>>> > >>>> Here is a part of the messages file: > >>>> > >>>> [ 1814.053285] scsi(7): DPC handler exiting > >>> [snip] > >>>> host5 is the physical port, and host8 is the virtual port that created > >>>> on host5. > >>>> This issue does not occur against CLARiiON for instanse. > >>> As you may know, the NPIV feature implemented in such a way to work only > >>> in switched fabric topology. > >>> It requires certain switch with NPIV capable to be able to make the > >>> feature fully working. > >> Yes, I know that, but we use the Multi ID feature in Qlogic 24xx > >> firmware, to create the virtual port in LOOP topology. > >> > >> I found that if I configure the LUN in the array to write cache disable > >> this problem does not occur; does this tell something to anyone ? > >> I don't think that it related to the vport, it will happened also with > >> physical port. > >> > >> Gal. > >>> Thank you, > >>> Seokmann > >>> > >>>> > >>>> Please help !!! > >>>> > >>>> Thanks, > >>>> Gal Rosen. > >>>> > >>>> > >>>> -- > >>>> To unsubscribe from this list: send the line "unsubscribe linux- > >>>> scsi" in > >>>> the body of a message to majordomo@xxxxxxxxxxxxxxx > >>>> More majordomo info at http://vger.kernel.org/majordomo-info.html > > -- > > To unsubscribe from this list: send the line "unsubscribe linux-scsi" in > > the body of a message to majordomo@xxxxxxxxxxxxxxx > > More majordomo info at http://vger.kernel.org/majordomo-info.html > > -- To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
