Am 15.07.17 um 10:51 schrieb Christoph Hellwig:
> On Fri, Jul 14, 2017 at 01:08:47PM -0400, Keith Busch wrote:
>>> So LVM2 backed by md raid1 isn't compatible with newer hardware... Any
>>> suggestions?
>> It's not that LVM2 or RAID isn't compatible. Either the IOMMU isn't
>> compatible if can use different page offsets for DMA addresses than the
>> physical aaddresses, or the driver for it is broken. The DMA addresses
>> in this mapped SGL look completely broken, at least, since the last 4
>> entries are all the same address. That'll corrupt data.
> Given that this is a Xen system I wonder if swiotlb-xen is involved
> here, which does some odd chunking of dma translations?
I did some more testing now.
With data stored on SATA disks with md1 and lvm2 (i.e. just replacing
NVME by SATA), there's nothing happening.
With data stored on /dev/nvme1n1p1, i.e. without any device mapping
stuff, I get the same problem.
Log attached.
Regards,
Andreas
Jul 15 15:25:06 xen2 [ 4376.149215] Invalid SGL for payload:20992 nents:5
Jul 15 15:25:06 xen2 [ 4376.150382] [ cut here ]
Jul 15 15:25:06 xen2 [ 4376.151261] WARNING: CPU: 0 PID: 29095 at
drivers/nvme/host/pci.c:623 nvme_queue_rq+0x81b/0x840 [nvme]
Jul 15 15:25:06 xen2 [ 4376.152194] Modules linked in: xt_physdev br_netfilter
iptable_filter xen_netback xen_blkback netconsole configfs bridge xen_gntdev
xen_evtchn xenfs xen_privcmd iTCO_wdt intel_rapl iTCO_vendor_support mxm_wmi
x86_pkg_temp_thermal intel_powerclamp coretemp crct10dif_pclmul crc32_pclmul
ghash_clmulni_intel pcbc aesni_intel aes_x86_64 crypto_simd glue_helper cryptd
intel_rapl_perf snd_pcm snd_timer snd soundcore pcspkr i2c_i801 joydev ast ttm
drm_kms_helper drm sg i2c_algo_bit lpc_ich ehci_pci mfd_core ehci_hcd mei_me
mei e1000e ixgbe ptp nvme pps_core mdio nvme_core ioatdma shpchp dca wmi
acpi_power_meter 8021q garp mrp stp llc button ipmi_si ipmi_devintf
ipmi_msghandler sunrpc drbd lru_cache ip_tables x_tables autofs4 ext4 crc16
mbcache jbd2 fscrypto raid10 raid456 libcrc32c crc32c_generic async_raid6_recov
Jul 15 15:25:06 xen2 [ 4376.158582] async_memcpy async_pq async_xor xor
async_tx raid6_pq raid0 multipath linear evdev hid_generic usbhid hid bcache
dm_mod raid1 md_mod sd_mod crc32c_intel ahci libahci xhci_pci xhci_hcd libata
usbcore scsi_mod
Jul 15 15:25:06 xen2 [ 4376.160593] CPU: 0 PID: 29095 Comm: 8.hda-0 Tainted: G
D W 4.12.0-20170713+ #1
Jul 15 15:25:06 xen2 [ 4376.161678] Hardware name: Supermicro X10DRi/X10DRI-T,
BIOS 2.1 09/13/2016
Jul 15 15:25:06 xen2 [ 4376.162649] task: 88015fdc5000 task.stack:
c90048134000
Jul 15 15:25:06 xen2 [ 4376.163676] RIP: e030:nvme_queue_rq+0x81b/0x840 [nvme]
Jul 15 15:25:06 xen2 [ 4376.164804] RSP: e02b:c90048137a00 EFLAGS: 00010286
Jul 15 15:25:06 xen2 [ 4376.165890] RAX: 0025 RBX: f200
RCX:
Jul 15 15:25:06 xen2 [ 4376.166982] RDX: RSI: 880186a0de98
RDI: 880186a0de98
Jul 15 15:25:06 xen2 [ 4376.168099] RBP: 8801732ff000 R08: 0001
R09: 0a57
Jul 15 15:25:06 xen2 [ 4376.169081] R10: 1000 R11: 0001
R12: 0200
Jul 15 15:25:06 xen2 [ 4376.170198] R13: 1000 R14: 88015f9d7800
R15: 88016fce1800
Jul 15 15:25:06 xen2 [ 4376.171330] FS: ()
GS:880186a0() knlGS:880186a0
Jul 15 15:25:06 xen2 [ 4376.172474] CS: e033 DS: ES: CR0:
80050033
Jul 15 15:25:06 xen2 [ 4376.173600] CR2: 00b0f98d1970 CR3: 000175d4f000
CR4: 00042660
Jul 15 15:25:06 xen2 [ 4376.174643] Call Trace:
Jul 15 15:25:06 xen2 [ 4376.175743] ? __sbitmap_get_word+0x2a/0x80
Jul 15 15:25:06 xen2 [ 4376.176814] ? blk_mq_dispatch_rq_list+0x200/0x3d0
Jul 15 15:25:06 xen2 [ 4376.177932] ? blk_mq_flush_busy_ctxs+0xd1/0x120
Jul 15 15:25:06 xen2 [ 4376.178961] ?
blk_mq_sched_dispatch_requests+0x1c0/0x1f0
Jul 15 15:25:06 xen2 [ 4376.179942] ? __blk_mq_delay_run_hw_queue+0x8f/0xa0
Jul 15 15:25:06 xen2 [ 4376.180941] ? blk_mq_flush_plug_list+0x184/0x260
Jul 15 15:25:06 xen2 [ 4376.181935] ? blk_flush_plug_list+0xf2/0x280
Jul 15 15:25:06 xen2 [ 4376.182952] ? blk_finish_plug+0x27/0x40
Jul 15 15:25:06 xen2 [ 4376.183985] ? dispatch_rw_block_io+0x732/0x9c0
[xen_blkback]
Jul 15 15:25:06 xen2 [ 4376.185059] ? _raw_spin_lock_irqsave+0x17/0x39
Jul 15 15:25:06 xen2 [ 4376.186103] ? __do_block_io_op+0x362/0x690
[xen_blkback]
Jul 15 15:25:06 xen2 [ 4376.187167] ? _raw_spin_unlock_irqrestore+0x16/0x20
Jul 15 15:25:06 xen2 [ 4376.188216] ? __do_block_io_op+0x362/0x690
[xen_blkback]
Jul 15 15:25:06 xen2 [ 4376.189294] ? xen_blkif_schedule+0x116/0x7f0
[xen_blkback]
Jul 15 15:25:06 xen2 [ 4376.190247] ? __schedule+0x3cd/0x850
Jul 15 15:25:06 xen2 [ 4376.191152] ? remove_wait_queue+0x60/0x60
Jul 15 15:25:06 xen2 [ 4376.192112] ? kthread+0xfc/0x130
Jul 15 15:25:06 xen2 [ 4376.193169] ? xen_blkif_be_int+0x30/0x30 [xen_blkback
