From mboxrd@z Thu Jan 1 00:00:00 1970 Content-Type: multipart/mixed; boundary="===============8329039774983269794==" MIME-Version: 1.0 From: Huang, Ying To: lkp@lists.01.org Subject: Re: [net] 9317bb6982: INFO: task cat-kmsg:893 blocked for more than 300 seconds. Date: Tue, 10 May 2016 09:26:51 +0800 Message-ID: <87zirywvms.fsf@yhuang-dev.intel.com> In-Reply-To: <87eg9kgcwg.fsf@yhuang-dev.intel.com> List-Id: --===============8329039774983269794== Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Hi, Eric, kernel test robot writes: > FYI, we noticed the following commit: > > git://internal_merge_and_test_tree devel-catchup-201604281529 > commit 9317bb69824ec8d078b0b786b6971aedb0af3d4f ("net: SOCKWQ_ASYNC_NOSPA= CE 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 | 9317bb6= 982 | > +--------------------------------------------------+------------+--------= ----+ > | 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 --===============8329039774983269794==--