2014-04-10

[subject changed]

On Thu, Apr 10, 2014 at 2:45 PM, <scameron@beardog.cce.hp.com> wrote:

> On Wed, Apr 09, 2014 at 11:32:37PM -0700, Davidlohr Bueso wrote:

>> On Wed, 2014-04-09 at 22:03 -0600, Bjorn Helgaas wrote:

>> > [+cc Joerg, iommu list]

>> >

>> > On Wed, Apr 9, 2014 at 6:19 PM, Davidlohr Bueso <davidlohr@hp.com> wrote:

>> > > On Wed, 2014-04-09 at 16:50 -0700, James Bottomley wrote:

>> > >> On Wed, 2014-04-09 at 16:40 -0700, Davidlohr Bueso wrote:

>> > >> > On Wed, 2014-04-09 at 16:10 -0700, James Bottomley wrote:

>> > >> > > On Wed, 2014-04-09 at 16:08 -0700, James Bottomley wrote:

>> > >> > > > [+linux-scsi]

>> > >> > > > On Wed, 2014-04-09 at 15:49 -0700, Davidlohr Bueso wrote:

>> > >> > > > > On Wed, 2014-04-09 at 10:39 +0800, Baoquan He wrote:

>> > >> > > > > > Hi,

>> > >> > > > > >

>> > >> > > > > > The kernel is 3.14.0+ which is pulled just now.

>> > >> > > > >

>> > >> > > > > Cc'ing more people.

>> > >> > > > >

>> > >> > > > > While the hpsa driver appears to be involved in some way, I'm sure if

>> > >> > > > > this is a related issue, but as of today's pull I'm getting another

>> > >> > > > > problem that causes my DL980 not to come up.

>> > >> > > > >

>> > >> > > > > *Massive* amounts of:

>> > >> > > > >

>> > >> > > > > DMAR:[fault reason 02] Present bit in context entry is clear

>> > >> > > > > dmar: DRHD: handling fault status reg 602

>> > >> > > > > dmar: DMAR:[DMA Read] Request device [02:00.0] fault addr 7f61e000

>> > >> > > > >

>> > >> > > > > Then:

>> > >> > > > >

>> > >> > > > > hpsa 0000:03:00.0: Controller lockup detected: 0xffff0000

>> > >> > > > > ...

>> > >> > > > > Workqueue: events hpsa_monitor_ctlr_worker [hpsa]

>> > >> > > > > ...

>> > >> > > > >

>> > >> > > > > Screenshot of the actual LOCKUP:

>> > >> > > > > http://stgolabs.net/hpsa-hard-lockup-3.14+.png

>> > >> > > > >

>> > >> > > > > While I haven't bisected, things worked fine until at least until commit

>> > >> > > > > 39de65aa2c3e (April 2nd).

>> > >> > > > >

>> > >> > > > > Any ideas?

>> > >> > > >

>> > >> > > > Well, it's either a DMA remapping issue or a hpsa one. Your assertion

>> > >> > > > that everything worked fine until 39de65aa2c3e would tend to vindicate

>> > >> > > > hpsa,

>> > >> >

>> > >> > Hmm here you mean DMA, right?

>> > >>

>> > >> No, it vindicates the hpsa changes ... they don't seem to be causing

>> > >> problems until something goes wrong with dma remapping.

>> > >>

>> > >> > > because all the hpsa changes went in before that under

>> > >> > > Missing crucial info:

>> > >> > >

>> > >> > > commit 1a0b6abaea78f73d9bc0a2f6df2d9e4c917cade1

>> > >> > >

>> > >> > > > Merge: 3e75c6d b2bff6c

>> > >> > > > Author: Linus Torvalds <torvalds@linux-foundation.org>

>> > >> > > > Date: Tue Apr 1 18:49:04 2014 -0700

>> > >> > > >

>> > >> > > > Merge tag 'scsi-misc' of

>> > >> > > > git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi

>> > >> > > >

>> > >> > > > can you revalidate that this commit works OK just to make sure?

>> > >> >

>> > >> > Ok so I don't see those DMA messages and system starts just fine. I'm

>> > >> > thinking perhaps something broke after the IO mmu stuff in commit

>> > >> > 3f583bc21977a608908b83d03ee2250426a5695c... could this be indirectly

>> > >> > causing the CPU stalls and just blame hpsa in the path as a side effect?

>> > >> >

>> > >> > /me goes out to try the commit.

>> > >>

>> > >> That's my guess. The DMAR messages are DMA remapping issues caused in

>> > >> the IOMMU. If I had to guess, I'd say the DMAR fault message is

>> > >> indicating the IOMMU is calling for a mapping address before it can

>> > >> satisfy the driver read request, which is causing the hang apparently in

>> > >> the hpsa driver.

>> > >>

>> > >> I've added linux-pci to the cc; I think they deal with iommu issues on

>> > >> x86.

>> > >

>> > > So that merge commit appears to be the culprit, I see both the DMA

>> > > messages and the lockup blaming hpsa...

>> >

>> > My understanding so far (please correct me if I'm wrong):

>> >

>> > 39de65aa2c3e OK ("Merge branch 'i2c/for-next'")

>> > 1a0b6abaea78 OK ("Merge tag 'scsi-misc'")

>

> ^^^ this one, 1a0b6abaea78, did not work for me, crashing in

> hpsa_enter_performant mode() which was surprsing to me as I am

> pretty sure I tried on this very same machine I'm using now

> (DL360p with P420, P430 and P420i) with 3.14-rc-something plus

> all the hpsa patches that I thought were merged in.

I think we have to completely different issues mixed together in this

thread, so I changed the subject here.

The reports above for 39de65aa2c3e, 1a0b6abaea78, were for a DMA fault.

The original message from Baoquan He was for a NULL pointer

dereference in hpsa_enter_performant_mode(), which is very likely the

same problem you're seeing, Steve.

I changed the subject to "hpsa NULL pointer in

hpsa_enter_performant_mode()", so hopefully we can chase the NULL

pointer issue there and leave the original, already long thread, for

the DMA fault issue.

> But now I am seeing:

>

> [<ffffffffa0002bd0>] hpsa_enter_performant_mode+0x4c0/0x540 [hpsa]

> RSP: 0018:ffff88042c515a78 EFLAGS: 00010297

> RAX: 0000000000000000 RBX: ffff88042c650000 RCX: 0000000000000004

> RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000

> RBP: ffff88042c515b48 R08: 0000000000000000 R09: 000000008af03cc0

> R10: 0000000000000000 R11: 0000000000000001 R12: ffff88042c515a98

> R13: 0000000060000104 R14: ffff88042c515ad8 R15: ffffffffa0001630

> FS: 00007f86f7a38700(0000) GS:ffff88043f560000(0000) knlGS:0000000000000000

> CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033

> usb 1-1.6: new low-speed USB device number 3 using ehci-pci

> CR2: 0000000000000000 CR3: 000000042c4c3000 CR4: 00000000000407e0

> Stack:

> 0000000000008024 ffffffffa00000c0 ffffffffa0000be0 0000000000000000

> 0000000600000005 0000000800000007 0000000a00000009 0000000c0000000b

> 0000000e0000000d 000000100000000f 0000001200000011 0000000400000013

> Call Trace:

> [<ffffffffa00000c0>] ? SA5_fifo_full+0x20/0x20 [hpsa]

> [<ffffffffa0000be0>] ? SA5_ioaccel_mode1_completed+0xd0/0xd0 [hpsa]

> [<ffffffffa000aab6>] hpsa_put_ctlr_into_performant_mode+0x186/0x320 [hpsa]

> [<ffffffffa0005132>] ? hpsa_allocate_sg_chain_blocks+0xa2/0xd0 [hpsa]

> [<ffffffffa000b08b>] hpsa_init_one+0x43b/0x7d0 [hpsa]

> [<ffffffff812bc34c>] local_pci_probe+0x4c/0xb0

> [<ffffffff812bc439>] pci_call_probe+0x89/0xb0

> [<ffffffff812bb074>] ? pci_match_device+0xc4/0xd0

> [<ffffffff812bc719>] pci_device_probe+0x79/0xa0

> [<ffffffff8138edd2>] ? driver_sysfs_add+0x82/0xb0

> [<ffffffff8138f03c>] really_probe+0x6c/0x320

> usb 1-1.6: New USB device found, idVendor=0624, idProduct=0341

> usb 1-1.6: New USB device strings: Mfr=1, Product=2, SerialNumber=0

> usb 1-1.6: Product: HP 336047-B21

> usb 1-1.6: Manufacturer: Avocent

> input: Avocent HP 336047-B21 as

> /devices/pci0000:00/0000:00:1a.0/usb1/1-1/1-1.64

> hid-generic 0003:0624:0341.0001: input,hidraw0: USB HID v1.10 Keyboard

> [Avocent0

> input: Avocent HP 336047-B21 as

> /devices/pci0000:00/0000:00:1a.0/usb1/1-1/1-1.65

> hid-generic 0003:0624:0341.0002: input,hidraw1: USB HID v1.10 Mouse [Avocent

> HP1

> [<ffffffff8138f337>] driver_probe_device+0x47/0xa0

> [<ffffffff8138f43b>] __driver_attach+0xab/0xb0

> [<ffffffff8138f390>] ? driver_probe_device+0xa0/0xa0

> [<ffffffff8138f390>] ? driver_probe_device+0xa0/0xa0

> [<ffffffff8138d1d4>] bus_for_each_dev+0x94/0xb0

> [<ffffffff8138ecfe>] driver_attach+0x1e/0x20

> [<ffffffff8138e6e0>] bus_add_driver+0x1b0/0x250

> usb 2-1.3: new high-speed USB device number 3 using ehci-pci

> [<ffffffffa0016000>] ? 0xffffffffa0015fff

> [<ffffffff8138f9d4>] driver_register+0x64/0xf0

> [<ffffffffa0016000>] ? 0xffffffffa0015fff

> [<ffffffff812bc80c>] __pci_register_driver+0x4c/0x50

> [<ffffffffa001601e>] hpsa_init+0x1e/0x20 [hpsa]

> [<ffffffff810002a2>] do_one_initcall+0xd2/0x180

> [<ffffffff810771a5>] ? __blocking_notifier_call_chain+0x65/0x80

> [<ffffffff810c8154>] do_init_module+0x44/0x1b0

> [<ffffffff810ca7c8>] load_module+0x5a8/0x6f0

> [<ffffffff810c7a30>] ? __unlink_module+0x30/0x30

> [<ffffffff81164c35>] ? __vmalloc_node+0x35/0x40

> [<ffffffff810c7120>] ? module_sect_show+0x30/0x30

> [<ffffffff810caa96>] SyS_init_module+0x96/0xc0

> [<ffffffff81590d52>] system_call_fastpath+0x16/0x1b

> Code: 89 45 8c 78 2c 31 f6 8d 4e 04 4c 89 e2 31 c0 0f 1f 40 00 39 0a 7d 0c usb

> 0

> usb 2-1.3: New USB device strings: Mfr=0, Product=0, SerialNumber=0

> hub 2-1.3:1.0: USB hub found

> hub 2-1.3:1.0: 2 ports detected

>

> 83 c0 01 48 83 c2 04 83 f8 10 75 f0 48 63 d6 83 c6 01 39 f7 <41> 89 04 90 7d

> d6

> RIP [<ffffffffa0002bd0>] hpsa_enter_performant_mode+0x4c0/0x540 [hpsa]

> RSP <ffff88042c515a78>

> CR2: 0000000000000000

> ---[ end trace ab56f106199a4971 ]---

>

>

>> > 3f583bc21977 BAD ("Merge tag 'iommu-updates-v3.15'")

>>

>> Yes, specifically (finally done bisecting):

>>

>> commit 2e45528930388658603ea24d49cf52867b928d3e

>> Author: Jiang Liu <jiang.liu@linux.intel.com>

>> Date: Wed Feb 19 14:07:36 2014 +0800

>>

>> iommu/vt-d: Unify the way to process DMAR device scope array

>>

>> Now we have a PCI bus notification based mechanism to update DMAR

>> device scope array, we could extend the mechanism to support boot

>> time initialization too, which will help to unify and simplify

>> the implementation.

>>

>> Signed-off-by: Jiang Liu <jiang.liu@linux.intel.com>

>> Signed-off-by: Joerg Roedel <joro@8bytes.org>

>

> My git bisect appears to be converging on something else, something

> within the hpsa patches that I sent up recently, unfortunately for

> me. Will let you all know when it converges.

>

> -- steve

>

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