"Huang, Ying" <ying.hu...@intel.com> writes:
> Eric Dumazet <eduma...@google.com> writes:
>> On Mon, May 9, 2016 at 6:26 PM, Huang, Ying <ying.hu...@linux.intel.com>
>> wrote:
>>> Hi, Eric,
>>>
>>> kernel test robot <ying.hu...@linux.intel.com> writes:
>>>> FYI, we noticed the following commit:
>>>>
>>>> git://internal_merge_and_test_tree devel-catchup-201604281529
>>>> commit 9317bb69824ec8d078b0b786b6971aedb0af3d4f ("net:
>>>> SOCKWQ_ASYNC_NOSPACE optimizations")
>>>>
>>>> on test machine: vm-kbuild-2G: 2 threads qemu-system-x86_64 -enable-kvm
>>>> -cpu Haswell,+smep,+smap with 2G memory
>>>>
>>>> caused below changes:
>>>>
>>>>
>>>> +--------------------------------------------------+------------+------------+
>>>> | | 210732d16d |
>>>> 9317bb6982 |
>>>> +--------------------------------------------------+------------+------------+
>>>> | boot_successes | 40 | 13
>>>> |
>>>> | boot_failures | 0 | 27
>>>> |
>>>> | INFO:task_blocked_for_more_than#seconds | 0 | 27
>>>> |
>>>> | RIP:native_safe_halt | 0 | 20
>>>> |
>>>> | RIP:native_write_msr_safe | 0 | 27
>>>> |
>>>> | Kernel_panic-not_syncing:hung_task:blocked_tasks | 0 | 27
>>>> |
>>>> | backtrace:__close_fd | 0 | 27
>>>> |
>>>> | backtrace:SyS_close | 0 | 27
>>>> |
>>>> | backtrace:cpu_startup_entry | 0 | 19
>>>> |
>>>> | backtrace:watchdog | 0 | 27
>>>> |
>>>> | RIP:__lock_acquire | 0 | 2
>>>> |
>>>> | backtrace:rpc_async_schedule | 0 | 2
>>>> |
>>>> | backtrace:lock_acquire | 0 | 1
>>>> |
>>>> | RIP:delay_tsc | 0 | 1
>>>> |
>>>> | backtrace:SYSC_epoll_wait | 0 | 1
>>>> |
>>>> | backtrace:SyS_epoll_wait | 0 | 1
>>>> |
>>>> | RIP:pvclock_clocksource_read | 0 | 1
>>>> |
>>>> | RIP:xs_reclassify_socket | 0 | 1
>>>> |
>>>> | backtrace:xs_tcp_setup_socket | 0 | 2
>>>> |
>>>> | RIP:insert_work | 0 | 1
>>>> |
>>>> +--------------------------------------------------+------------+------------+
>>>
>>> We recently found this patch cause NFS hang in 0day/LKP test system.
>>> The NFS export can be mounted, but after a while all read/write to NFS
>>> mount blocked. This influenced the 0day/LKP testing. Could you help us
>>> to fix this?
>>>
>>> Best Regards,
>>> Huang, Ying
>>
>>
>> I need to officially submit this patch :
>> http://www.spinics.net/lists/netdev/msg375777.html
>
> Thanks a lot! The patch fixed our NFS hang.
>
> Tested-by: Huang, Ying <ying.hu...@intel.com>
>
> Is it possible to put the fixing patch near (preferably next) the patch
> trigger regression? Otherwise a bigger range of patches will not be
> bisectable.
Hi, Eric,
Is it possible for this to be fixed in linux-next ASAP? This has
blocked us (0day functionality and performance test) from testing
linux-next and many other git trees for near 1 week. Because NFS is
used in our test infrastructure to save test result data.
Best Regards,
Huang, Ying
