----- Original Message ----- > From: "CAI Qian" <caiqian@xxxxxxxxxx> > To: "Al Viro" <viro@xxxxxxxxxxxxxxxxxx> > Cc: "Linus Torvalds" <torvalds@xxxxxxxxxxxxxxxxxxxx>, "Dave Chinner" <david@xxxxxxxxxxxxx>, "linux-xfs" > <linux-xfs@xxxxxxxxxxxxxxx>, "Jens Axboe" <axboe@xxxxxxxxx>, "Nick Piggin" <npiggin@xxxxxxxxx>, > linux-fsdevel@xxxxxxxxxxxxxxx > Sent: Monday, October 3, 2016 10:06:27 AM > Subject: Re: [RFC][CFT] splice_read reworked > > > > ----- Original Message ----- > > From: "Al Viro" <viro@xxxxxxxxxxxxxxxxxx> > > To: "CAI Qian" <caiqian@xxxxxxxxxx> > > Cc: "Linus Torvalds" <torvalds@xxxxxxxxxxxxxxxxxxxx>, "Dave Chinner" > > <david@xxxxxxxxxxxxx>, "linux-xfs" > > <linux-xfs@xxxxxxxxxxxxxxx>, "Jens Axboe" <axboe@xxxxxxxxx>, "Nick Piggin" > > <npiggin@xxxxxxxxx>, > > linux-fsdevel@xxxxxxxxxxxxxxx > > Sent: Sunday, October 2, 2016 9:42:18 PM > > Subject: Re: [RFC][CFT] splice_read reworked > > > > On Fri, Sep 30, 2016 at 01:42:17PM -0400, CAI Qian wrote: > > > > > [ 1599.151286] ------------[ cut here ]------------ > > > [ 1599.156457] WARNING: CPU: 37 PID: 95143 at lib/iov_iter.c:316 > > > sanity+0x75/0x80 > > > > [snip] > > > > > [ 1599.344171] [<ffffffff813e9b45>] sanity+0x75/0x80 > > > [ 1599.349518] [<ffffffff813ec739>] copy_page_to_iter+0xf9/0x1e0 > > > [ 1599.356027] [<ffffffff8120691f>] shmem_file_read_iter+0x9f/0x340 > > > [ 1599.362829] [<ffffffff812bbeb9>] generic_file_splice_read+0xb9/0x1b0 > > > [ 1599.370015] [<ffffffff812bc206>] do_splice_to+0x76/0x90 > > > [ 1599.375941] [<ffffffff812bc2db>] splice_direct_to_actor+0xbb/0x220 > > > [ 1599.382935] [<ffffffff812bba80>] ? generic_pipe_buf_nosteal+0x10/0x10 > > > [ 1599.390220] [<ffffffff812bc4d8>] do_splice_direct+0x98/0xd0 > > > [ 1599.396537] [<ffffffff81281dd1>] do_sendfile+0x1d1/0x3b0 > > > [ 1599.402563] [<ffffffff81282973>] SyS_sendfile64+0x73/0xd0 > > > [ 1599.408685] [<ffffffff81003f8c>] do_syscall_64+0x6c/0x1e0 > > > [ 1599.414820] [<ffffffff817d927f>] entry_SYSCALL64_slow_path+0x25/0x25 > > > > IOW, sendfile from shmem... How easily is that reproduced (IOW, did you > > get any more of those)? > > > It is pretty reproducible so far by just running the trinity from a docker > container backed by overlayfs/xfs. There is another warning happened once so far. Not sure if related. [ 447.961826] ------------[ cut here ]------------ [ 447.967020] WARNING: CPU: 39 PID: 27352 at fs/xfs/xfs_file.c:626 xfs_file_dio_aio_write+0x3dc/0x4b0 [xfs] [ 447.977736] Modules linked in: ieee802154_socket ieee802154 af_key vmw_vsock_vmci_transport vsock vmw_vmci bluetooth rfkill can pptp gre l2tp_ppp l2tp_netlink l2tp_core ip6_udp_tunnel udp_tunnel pppoe pppox ppp_generic slhc nfnetlink scsi_transport_iscsi atm sctp veth ipt_MASQUERADE nf_nat_masquerade_ipv4 iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 xt_addrtype iptable_filter xt_conntrack nf_nat nf_conntrack br_netfilter bridge stp llc overlay intel_rapl sb_edac edac_core x86_pkg_temp_thermal intel_powerclamp coretemp kvm_intel kvm irqbypass crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel lrw gf128mul glue_helper ablk_helper cryptd iTCO_wdt iTCO_vendor_support pcspkr i2c_i801 i2c_smbus ipmi_ssif mei_me sg mei shpchp lpc_ich wmi ipmi_si ipmi_msghandler acpi_pad acpi_power_meter nfsd auth_rpcgss nfs_acl lockd grace sunrpc ip_tables xfs libcrc32c sr_mod sd_mod cdrom mgag200 i2c_algo_bit drm_kms_helper syscopyarea sysfillrect sysimgblt fb_sys_fops crc32c_intel ttm ixgbe drm mdio ahci ptp libahci pps_core libata i2c_core dca fjes dm_mirror dm_region_hash dm_log dm_mod [ 448.086775] CPU: 39 PID: 27352 Comm: trinity-c39 Not tainted 4.8.0-rc8-splice+ #1 [ 448.095126] Hardware name: Intel Corporation S2600WTT/S2600WTT, BIOS GRNDSDP1.86B.0044.R00.1501191641 01/19/2015 [ 448.106483] 0000000000000286 00000000389140f2 ffff880404833c48 ffffffff813d2eac [ 448.114776] 0000000000000000 0000000000000000 ffff880404833c88 ffffffff8109cf11 [ 448.123067] 00000272389140f2 ffff880404833d80 ffff880404833dd8 ffff8803bfba88e8 [ 448.131356] Call Trace: [ 448.134088] [<ffffffff813d2eac>] dump_stack+0x85/0xc9 [ 448.139821] [<ffffffff8109cf11>] __warn+0xd1/0xf0 [ 448.145167] [<ffffffff8109d04d>] warn_slowpath_null+0x1d/0x20 [ 448.151705] [<ffffffffa044165c>] xfs_file_dio_aio_write+0x3dc/0x4b0 [xfs] [ 448.159394] [<ffffffffa0441b10>] xfs_file_write_iter+0x90/0x130 [xfs] [ 448.166679] [<ffffffff81280eee>] do_iter_readv_writev+0xae/0x130 [ 448.173479] [<ffffffff81281992>] do_readv_writev+0x1a2/0x230 [ 448.179906] [<ffffffffa0441a80>] ? xfs_file_buffered_aio_write+0x350/0x350 [xfs] [ 448.188256] [<ffffffff8117729f>] ? __audit_syscall_entry+0xaf/0x100 [ 448.195347] [<ffffffff810fce1d>] ? trace_hardirqs_on+0xd/0x10 [ 448.201855] [<ffffffff8117729f>] ? __audit_syscall_entry+0xaf/0x100 [ 448.208944] [<ffffffff81281c6c>] vfs_writev+0x3c/0x50 [ 448.214675] [<ffffffff81281e22>] do_pwritev+0xa2/0xc0 [ 448.220407] [<ffffffff81282f11>] SyS_pwritev+0x11/0x20 [ 448.226237] [<ffffffff81003c9c>] do_syscall_64+0x6c/0x1e0 [ 448.232358] [<ffffffff817d4a3f>] entry_SYSCALL64_slow_path+0x25/0x25 [ 448.239560] ---[ end trace 1c54e743f1fa4f5e ]--- -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
