Hi, (sorry for replying on the old thread, but I found it could be related to the issue I have now) On Tue, Jul 28, 2015 at 10:29 PM, Bjorn Helgaas <bhelgaas@xxxxxxxxxx> wrote: > On Tue, Jul 28, 2015 at 10:45:26AM -0700, Duc Dang wrote: >> On Tue, Jul 28, 2015 at 9:43 AM, Bjorn Helgaas <bhelgaas@xxxxxxxxxx> wrote: >> > On Fri, Jul 24, 2015 at 7:05 PM, Duc Dang <dhdang@xxxxxxx> wrote: >> >> Hi Bjorn, >> >> >> >> On Fri, Jul 24, 2015 at 3:42 PM, Bjorn Helgaas <bhelgaas@xxxxxxxxxx> wrote: >> >>> >> >>> I regularly see faults like this on an APM X-Gene: >> >>> >> >>> U-Boot 2013.04-mustang_sw_1.14.14 (Dec 16 2014 - 15:59:33) >> >>> CPU0: APM ARM 64-bit Potenza Rev B0 2400MHz PCP 2400MHz >> >>> 32 KB ICACHE, 32 KB DCACHE >> >>> SOC 2000MHz IOBAXI 400MHz AXI 250MHz AHB 200MHz GFC 125MHz >> >>> ... >> >>> Unhandled fault: synchronous external abort (0x96000010) at 0xffffff8000110034 >> >>> Internal error: : 96000010 [#1] SMP >> >>> Modules linked in: >> >>> CPU: 0 PID: 3723 Comm: ... 4.1.0-smp-DEV #3 >> >>> Hardware name: APM X-Gene Mustang board (DT) >> >>> task: ffffffc7dc1a4140 ti: ffffffc7dc118000 task.ti: ffffffc7dc118000 >> >>> PC is at pci_generic_config_read32+0x4c/0xb8 >> >>> LR is at pci_generic_config_read32+0x40/0xb8 >> >>> pc : [<ffffffc00033b90c>] lr : [<ffffffc00033b900>] pstate: 600001c5 >> >>> ... >> >>> Call trace: >> >>> [<ffffffc00033b90c>] pci_generic_config_read32+0x4c/0xb8 >> >>> [<ffffffc00033bf58>] pci_user_read_config_byte+0x60/0xc4 >> >>> [<ffffffc0003496a8>] pci_read_config+0x15c/0x238 >> >>> [<ffffffc0002393b4>] sysfs_kf_bin_read+0x68/0xa0 >> >>> [<ffffffc00023896c>] kernfs_fop_read+0x9c/0x1ac >> >>> [<ffffffc0001c361c>] __vfs_read+0x44/0x128 >> >>> [<ffffffc0001c3e28>] vfs_read+0x84/0x144 >> >>> [<ffffffc0001c4764>] SyS_read+0x50/0xb0 >> >> >> >> The log shows kernel gets an exception when trying to access Mellanox >> >> card configuration space. This is usually due to suboptimal PCIe >> >> SerDes parameters are using in your board, which will cause bad link >> >> quality. >> >> The PCIe SerDes programming is done in U-Boot, so I suggest you do a >> >> U-Boot upgrade to our latest X-Gene U-Boot release. >> > >> > I installed U-Boot 1.15.12, which I thought was the latest. I'm still >> > seeing this issue regularly, approx once/hour. >> >> Our latest U-Boot is 1.15.15, but U-Boot 1.15.12 is already a good >> version to use. Are you running any PCIe traffic test when the error >> happens? > > Nope, the machine was either idle or running a reboot test; no PCIe stress > test or anything. > Was there any conclusion on this ? I am having similar issue[1] on my Juno with sky2 PCIe driver during reboot. Regards, Sudeep [1] http://marc.info/?l=linux-netdev&m=146046999701956&w=2 -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
