On 06/29/2013 12:20 AM, Eric Dumazet wrote:> On Sat, 2013-06-29 at 07:36 +0800, Joe Jin wrote:
>> Hi Eric,
>>
>> The patch not fix the issue and panic as same as early I posted:
>>> BUG: unable to handle kernel paging request at ffff88006d9e8d48
>>> IP: [<ffffffff812605bb>] memcpy+0xb/0x120
>>> PGD 1798067 PUD 1fd2067 PMD 213f067 PTE 0
>>> Oops: 0000 [#1] SMP
>>> CPU 7
>>> Modules linked in: dm_nfs tun nfs fscache auth_rpcgss nfs_acl
xen_blkback xen_netback xen_gntdev xen_evtchn lockd sunrpc bridge stp llc
bonding be2iscsi iscsi_boot_sysfs ib_iser rdma_cm ib_cm iw_cm ib_sa ib_mad
ib_core ib_addr iscsi_tcp bnx2i cnic uio ipv6 cxgb3i libcxgbi cxgb3 mdio
dm_round_robin dm_multipath libiscsi_tcp libiscsi scsi_transport_iscsi xenfs
xen_privcmd video sbs sbshc acpi_memhotplug acpi_ipmi ipmi_msghandler parport_pc
lp parport ixgbe dca sr_mod cdrom bnx2 radeon ttm drm_kms_helper drm
snd_seq_dummy i2c_algo_bit i2c_core snd_seq_oss snd_seq_midi_event snd_seq
snd_seq_device snd_pcm_oss snd_mixer_oss serio_raw snd_pcm snd_timer snd
soundcore snd_page_alloc iTCO_wdt pcspkr iTCO_vendor_support pata_acpi dcdbas
i5k_amb ata_generic hwmon floppy ghes i5000_edac edac_core
hed dm_snapshot dm_zero dm_mirror dm_region_hash dm_log dm_mod usb_storage lpfc
scsi_transport_fc scsi_tgt ata_piix sg shpchp mptsas mptscsih mptbase
scsi_transport_sas sd_mod crc_t10dif ex!
t3!>> jbd mbcac
>> he
>>>
>>>
>>> Pid: 0, comm: swapper Tainted: G W 2.6.39-300.32.1.el5uek
#1 Dell Inc. PowerEdge 2950/0DP246
>
>
> By the way my patch was for current kernels, not for 2.6.39
Do you know if your patch should go in 3.9?
Your test case sounds a bit like what gives us the rare crash in tcp_collapse
(we have lots of bouncing wifi interfaces running slow-speed TCP trafic). But,
it takes days for us to hit the problem most of the time.
Thanks,
Ben
--
Ben Greear <greearb@candelatech.com>
Candela Technologies Inc http://www.candelatech.com