Johannes OK , yes thanks for pointing out the commit. Laurence Oberman Principal Software Maintenance Engineer Red Hat Global Support Services ----- Original Message ----- From: "Johannes Thumshirn" <jthmshirn@xxxxxxx> To: "Laurence Oberman" <loberman@xxxxxxxxxx> Cc: "Johannes Thumshirn" <jthumshirn@xxxxxxx>, "Martin K . Petersen" <martin.petersen@xxxxxxxxxx>, "James E . J . Bottomley" <jejb@xxxxxxxxxxxxxxxxxx>, linux-scsi@xxxxxxxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx, "Laura Abbott" <labbott@xxxxxxxxxx>, "Michael Reed" <mdr@xxxxxxx>, stable@xxxxxxxxxxxxxxx Sent: Friday, April 22, 2016 10:01:48 AM Subject: Re: [PATCH] qla1280: Reduce can_queue to 32 On Fri, Apr 22, 2016 at 08:16:44AM -0400, Laurence Oberman wrote: > The change looks fine, I see its hard-coded to 32 in qla1280_set_defaults() > Would it be better to create a #define like other drivers and use that in both. > Also did the below patch resolve this for the bug reporter. Yes, that's probably a reasonable idea, I'll re-send. > I ask because if I check 4.3 it was also set to the same value of 0xfffff and that is reported as working. > So other changes in 4.4 must be "abusing" this high value. I think it was introduced with commit 64d513ac31b - "scsi: use host wide tags by default". Since this commit scsi_add_host_with_dma() directly calls blk_init_tags() instead of scsi_init_shared_tag_map(). The qla1280 driver has never set up the block tags though, so the bogus value was not a problem. That at least is my analysis, feel free to correct my assumptions. > > Reviewed-by Laurence Oberman <loberman@xxxxxxxxxx> > > Laurence Oberman > Principal Software Maintenance Engineer > Red Hat Global Support Services > > ----- Original Message ----- > From: "Johannes Thumshirn" <jthumshirn@xxxxxxx> > To: "Martin K . Petersen" <martin.petersen@xxxxxxxxxx>, "James E . J . Bottomley" <jejb@xxxxxxxxxxxxxxxxxx> > Cc: linux-scsi@xxxxxxxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx, "Johannes Thumshirn" <jthumshirn@xxxxxxx>, "Laura Abbott" <labbott@xxxxxxxxxx>, "Michael Reed" <mdr@xxxxxxx>, stable@xxxxxxxxxxxxxxx > Sent: Friday, April 22, 2016 3:31:10 AM > Subject: [PATCH] qla1280: Reduce can_queue to 32 > > It was reported in https://bugzilla.redhat.com/show_bug.cgi?id=1321033, > that the qla1280 driver sets the scsi_host_template's can_queue field > to 0xfffff which results in an allocation failure when allocating the > block layer tags for the driver's queues like the one shown below: > > [ 4.804166] scsi host0: QLogic QLA1040 PCI to SCSI Host Adapter Firmware version: 7.65.06, Driver version 3.27.1 > [ 4.804174] ------------[ cut here ]------------ > [ 4.804184] WARNING: CPU: 2 PID: 305 at mm/page_alloc.c:2989 alloc_pages_nodemask+0xae8/0xbc0() > [ 4.804186] Modules linked in: amdkfd amd_iommu_v2 radeon i2c_algo_bit m_kms_helper ttm drm megaraid_sas serio_raw 8021q garp bnx2 stp llc mrp nhme qla1280(+) fjes > [ 4.804208] CPU: 2 PID: 305 Comm: systemd-udevd Not tainted 4.6-201.fc22.x86_64 #1 > [ 4.804210] Hardware name: Google Enterprise Search Appliance/0DT021, OS 1.1.2 08/14/2006 > [ 4.804212] 0000000000000286 000000002f01064c ffff88042985b710 ffffff813b542e > [ 4.804216] 0000000000000000 ffffffff81a75024 ffff88042985b748 ffffff810a40f2 > [ 4.804220] 0000000000000000 0000000000000000 000000000000000b 00000000000000 > [ 4.804223] Call Trace: > [ 4.804231] [<ffffffff813b542e>] dump_stack+0x63/0x85 > [ 4.804236] [<ffffffff810a40f2>] warn_slowpath_common+0x82/0xc0 > [ 4.804239] [<ffffffff810a423a>] warn_slowpath_null+0x1a/0x20 > [ 4.804242] [<ffffffff811b75e8>] __alloc_pages_nodemask+0xae8/0xbc0 > [ 4.804247] [<ffffffff817a002e>] ? _raw_spin_unlock_irqrestore+0xe/0x10 > [ 4.804251] [<ffffffff811908be>] ? irq_work_queue+0x8e/0xa0 > [ 4.804256] [<ffffffff810fa10a>] ? console_unlock+0x20a/0x540 > [ 4.804262] [<ffffffff812029cc>] alloc_pages_current+0x8c/0x110 > [ 4.804265] [<ffffffff811b5159>] alloc_kmem_pages+0x19/0x90 > [ 4.804268] [<ffffffff811d2efe>] kmalloc_order_trace+0x2e/0xe0 > [ 4.804272] [<ffffffff8120e6d2>] __kmalloc+0x232/0x260 > [ 4.804277] [<ffffffff8138990d>] init_tag_map+0x3d/0xc0 > [ 4.804290] [<ffffffff813899d5>] __blk_queue_init_tags+0x45/0x80 > [ 4.804293] [<ffffffff81389a24>] blk_init_tags+0x14/0x20 > [ 4.804298] [<ffffffff81520e60>] scsi_add_host_with_dma+0x80/0x300 > [ 4.804305] [<ffffffffa000fec3>] qla1280_probe_one+0x683/0x9ef [qla1280] > [ 4.804309] [<ffffffff81401115>] local_pci_probe+0x45/0xa0 > [ 4.804312] [<ffffffff814024fd>] pci_device_probe+0xfd/0x140 > [ 4.804316] [<ffffffff814ef1d2>] driver_probe_device+0x222/0x490 > [ 4.804319] [<ffffffff814ef4c4>] __driver_attach+0x84/0x90 > [ 4.804321] [<ffffffff814ef440>] ? driver_probe_device+0x490/0x490 > [ 4.804324] [<ffffffff814eccac>] bus_for_each_dev+0x6c/0xc0 > [ 4.804326] [<ffffffff814ee98e>] driver_attach+0x1e/0x20 > [ 4.804328] [<ffffffff814ee4cb>] bus_add_driver+0x1eb/0x280 > [ 4.804331] [<ffffffffa0015000>] ? 0xffffffffa0015000 > [ 4.804333] [<ffffffff814efd80>] driver_register+0x60/0xe0 > [ 4.804336] [<ffffffff81400a5c>] __pci_register_driver+0x4c/0x50 > [ 4.804339] [<ffffffffa00151ce>] qla1280_init+0x1ce/0x1000 [qla1280] > [ 4.804341] [<ffffffffa0015000>] ? 0xffffffffa0015000 > [ 4.804345] [<ffffffff81002123>] do_one_initcall+0xb3/0x200 > [ 4.804348] [<ffffffff8120d086>] ? kmem_cache_alloc_trace+0x196/0x210 > [ 4.804352] [<ffffffff811aba7e>] ? do_init_module+0x27/0x1cb > [ 4.804354] [<ffffffff811abab6>] do_init_module+0x5f/0x1cb > [ 4.804358] [<ffffffff8112a6e0>] load_module+0x2040/0x2680 > [ 4.804360] [<ffffffff81126e40>] ? __symbol_put+0x60/0x60 > [ 4.804363] [<ffffffff8112ae69>] SYSC_init_module+0x149/0x190 > [ 4.804366] [<ffffffff8112af9e>] SyS_init_module+0xe/0x10 > [ 4.804369] [<ffffffff817a05ae>] entry_SYSCALL_64_fastpath+0x12/0x71 > [ 4.804371] ---[ end trace 0ea3b625f86705f7 ]--- > [ 4.804581] qla1280: probe of 0000:11:04.0 failed with error -12 > > In qla1280_set_defaults() the maximum queue depth is > set to 32 so adopt the scsi_host_template to it as well. > > Signed-off-by: Johannes Thumshirn <jthumshirn@xxxxxxx> > Cc: Laura Abbott <labbott@xxxxxxxxxx> > Cc: Michael Reed <mdr@xxxxxxx> > Cc: stable@xxxxxxxxxxxxxxx > --- > drivers/scsi/qla1280.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/drivers/scsi/qla1280.c b/drivers/scsi/qla1280.c > index 5d0ec42..6bd748e 100644 > --- a/drivers/scsi/qla1280.c > +++ b/drivers/scsi/qla1280.c > @@ -4214,7 +4214,7 @@ static struct scsi_host_template qla1280_driver_template = { > .eh_bus_reset_handler = qla1280_eh_bus_reset, > .eh_host_reset_handler = qla1280_eh_adapter_reset, > .bios_param = qla1280_biosparam, > - .can_queue = 0xfffff, > + .can_queue = 32, > .this_id = -1, > .sg_tablesize = SG_ALL, > .use_clustering = ENABLE_CLUSTERING, > -- > 2.8.1 > > -- > 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 -- Johannes Thumshirn Storage jthumshirn@xxxxxxx +49 911 74053 689 SUSE LINUX GmbH, Maxfeldstr. 5, 90409 Nürnberg GF: Felix Imendörffer, Jane Smithard, Graham Norton HRB 21284 (AG Nürnberg) Key fingerprint = EC38 9CAB C2C4 F25D 8600 D0D0 0393 969D 2D76 0850 -- 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
