>From an email conversation on our mailing list from Stefan Bader: This looks to be introduced by: vfs: fix data corruption when blocksize < pagesize for mmaped data BugLink: http://bugs.launchpad.net/bugs/1393477 commit 90a8020278c1598fafd071736a0846b38510309c upstream. and fixed by: commit f55fefd1a5a339b1bd08c120b93312d6eb64a9fb Author: Jan Kara <j...@suse.cz> Date: Thu Oct 30 10:35:00 2014 +1100 mm: Remove false WARN_ON from pagecache_isize_extended()
and: Oh, and just for explanation: this is a warning which is wrong. But until it is fixed up the only impact is the number of annoying messages in dmesg. The follow up change from upstream just removes the warning, nothing else. And since it is "only" a warning there is no other effect. ** Description changed: - Hi all, - - I have updated my ubuntu 14.04 LTS server this morning. Until then I - am seeing a lot of errors like: - - [ 4174.782378] WARNING: CPU: 1 PID: 4940 at - /build/buildd/linux-3.13.0/mm/truncate.c:652 - pagecache_isize_extended+0xfd/0x110() - [ 4174.782381] Modules linked in: ctr ccm ipt_MASQUERADE iptable_nat - nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 nf_nat nf_conntrack - iptable_filter ip_tables x_tables bridge stp llc snd_hda_codec_hdmi - arc4 nvidia(POX) rtl8187 snd_hda_intel snd_hda_codec snd_hwdep snd_pcm - snd_page_alloc mac80211 snd_seq_midi snd_seq_midi_event cfg80211 - eeprom_93cx6 snd_rawmidi joydev snd_seq snd_seq_device kvm_amd - snd_timer kvm drm snd sp5100_tco amd64_edac_mod soundcore edac_core - edac_mce_amd i2c_piix4 k10temp mac_hid xfs lp parport libcrc32c - pata_acpi hid_logitech_dj usbhid hid pata_atiixp tg3 ptp pps_core ahci - libahci - [ 4174.782433] CPU: 1 PID: 4940 Comm: URL Classifier Tainted: P - W OX 3.13.0-43-generic #72-Ubuntu - [ 4174.782436] Hardware name: HP ProLiant MicroServer, BIOS O41 10/01/2013 - [ 4174.782439] 0000000000000009 ffff88006a90bd70 ffffffff81720bf6 - 0000000000000000 - [ 4174.782443] ffff88006a90bda8 ffffffff810677cd 0000000000001000 - ffff88012e12f598 - [ 4174.782447] 0000000000000000 0000000000000008 00000000000dd9d0 - ffff88006a90bdb8 - [ 4174.782451] Call Trace: - [ 4174.782459] [<ffffffff81720bf6>] dump_stack+0x45/0x56 - [ 4174.782464] [<ffffffff810677cd>] warn_slowpath_common+0x7d/0xa0 - [ 4174.782467] [<ffffffff810678aa>] warn_slowpath_null+0x1a/0x20 - [ 4174.782472] [<ffffffff8115dc8d>] pagecache_isize_extended+0xfd/0x110 - [ 4174.782476] [<ffffffff8115e867>] truncate_setsize+0x27/0x40 + Hi all, + + I have updated my ubuntu 14.04 LTS server this morning. Until then I + am seeing a lot of errors like: + + [ 4174.782378] WARNING: CPU: 1 PID: 4940 at + /build/buildd/linux-3.13.0/mm/truncate.c:652 + pagecache_isize_extended+0xfd/0x110() + [ 4174.782381] Modules linked in: ctr ccm ipt_MASQUERADE iptable_nat + nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 nf_nat nf_conntrack + iptable_filter ip_tables x_tables bridge stp llc snd_hda_codec_hdmi + arc4 nvidia(POX) rtl8187 snd_hda_intel snd_hda_codec snd_hwdep snd_pcm + snd_page_alloc mac80211 snd_seq_midi snd_seq_midi_event cfg80211 + eeprom_93cx6 snd_rawmidi joydev snd_seq snd_seq_device kvm_amd + snd_timer kvm drm snd sp5100_tco amd64_edac_mod soundcore edac_core + edac_mce_amd i2c_piix4 k10temp mac_hid xfs lp parport libcrc32c + pata_acpi hid_logitech_dj usbhid hid pata_atiixp tg3 ptp pps_core ahci + libahci + [ 4174.782433] CPU: 1 PID: 4940 Comm: URL Classifier Tainted: P + W OX 3.13.0-43-generic #72-Ubuntu + [ 4174.782436] Hardware name: HP ProLiant MicroServer, BIOS O41 10/01/2013 + [ 4174.782439] 0000000000000009 ffff88006a90bd70 ffffffff81720bf6 + 0000000000000000 + [ 4174.782443] ffff88006a90bda8 ffffffff810677cd 0000000000001000 + ffff88012e12f598 + [ 4174.782447] 0000000000000000 0000000000000008 00000000000dd9d0 + ffff88006a90bdb8 + [ 4174.782451] Call Trace: + [ 4174.782459] [<ffffffff81720bf6>] dump_stack+0x45/0x56 + [ 4174.782464] [<ffffffff810677cd>] warn_slowpath_common+0x7d/0xa0 + [ 4174.782467] [<ffffffff810678aa>] warn_slowpath_null+0x1a/0x20 + [ 4174.782472] [<ffffffff8115dc8d>] pagecache_isize_extended+0xfd/0x110 + [ 4174.782476] [<ffffffff8115e867>] truncate_setsize+0x27/0x40 [ 4174.782515] [<ffffffffa00ce7c2>] xfs_setattr_size+0x182/0x3e0 [xfs] - [ 4174.782540] [<ffffffffa00c375c>] xfs_file_fallocate+0x19c/0x260 [xfs] - [ 4174.782546] [<ffffffff811c0229>] ? __sb_start_write+0x49/0xe0 - [ 4174.782550] [<ffffffff811bbf59>] do_fallocate+0xf9/0x190 - [ 4174.782554] [<ffffffff811bc03c>] SyS_fallocate+0x4c/0x80 - [ 4174.782558] [<ffffffff817316ad>] system_call_fastpath+0x1a/0x1f + [ 4174.782540] [<ffffffffa00c375c>] xfs_file_fallocate+0x19c/0x260 [xfs] + [ 4174.782546] [<ffffffff811c0229>] ? __sb_start_write+0x49/0xe0 + [ 4174.782550] [<ffffffff811bbf59>] do_fallocate+0xf9/0x190 + [ 4174.782554] [<ffffffff811bc03c>] SyS_fallocate+0x4c/0x80 + [ 4174.782558] [<ffffffff817316ad>] system_call_fastpath+0x1a/0x1f [ 4174.782561] ---[ end trace aeb446f67bc8e89e ]--- + + === + break-fix: 90a8020278c1598fafd071736a0846b38510309c f55fefd1a5a339b1bd08c120b93312d6eb64a9fb ** Tags added: kerne-bug-break-fix ** Tags removed: kerne-bug-break-fix ** Tags added: kernel-bug-break-fix -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1402764 Title: WARNING: CPU: 1 PID: 4940 at /build/buildd/linux-3.13.0/mm/truncate.c:652 pagecache_isize_extended+0xfd/0x110() in 3.13.0-43-generic Status in linux package in Ubuntu: In Progress Status in linux source package in Trusty: New Status in linux source package in Utopic: New Status in linux source package in Vivid: In Progress Bug description: Hi all, I have updated my ubuntu 14.04 LTS server this morning. Until then I am seeing a lot of errors like: [ 4174.782378] WARNING: CPU: 1 PID: 4940 at /build/buildd/linux-3.13.0/mm/truncate.c:652 pagecache_isize_extended+0xfd/0x110() [ 4174.782381] Modules linked in: ctr ccm ipt_MASQUERADE iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 nf_nat nf_conntrack iptable_filter ip_tables x_tables bridge stp llc snd_hda_codec_hdmi arc4 nvidia(POX) rtl8187 snd_hda_intel snd_hda_codec snd_hwdep snd_pcm snd_page_alloc mac80211 snd_seq_midi snd_seq_midi_event cfg80211 eeprom_93cx6 snd_rawmidi joydev snd_seq snd_seq_device kvm_amd snd_timer kvm drm snd sp5100_tco amd64_edac_mod soundcore edac_core edac_mce_amd i2c_piix4 k10temp mac_hid xfs lp parport libcrc32c pata_acpi hid_logitech_dj usbhid hid pata_atiixp tg3 ptp pps_core ahci libahci [ 4174.782433] CPU: 1 PID: 4940 Comm: URL Classifier Tainted: P W OX 3.13.0-43-generic #72-Ubuntu [ 4174.782436] Hardware name: HP ProLiant MicroServer, BIOS O41 10/01/2013 [ 4174.782439] 0000000000000009 ffff88006a90bd70 ffffffff81720bf6 0000000000000000 [ 4174.782443] ffff88006a90bda8 ffffffff810677cd 0000000000001000 ffff88012e12f598 [ 4174.782447] 0000000000000000 0000000000000008 00000000000dd9d0 ffff88006a90bdb8 [ 4174.782451] Call Trace: [ 4174.782459] [<ffffffff81720bf6>] dump_stack+0x45/0x56 [ 4174.782464] [<ffffffff810677cd>] warn_slowpath_common+0x7d/0xa0 [ 4174.782467] [<ffffffff810678aa>] warn_slowpath_null+0x1a/0x20 [ 4174.782472] [<ffffffff8115dc8d>] pagecache_isize_extended+0xfd/0x110 [ 4174.782476] [<ffffffff8115e867>] truncate_setsize+0x27/0x40 [ 4174.782515] [<ffffffffa00ce7c2>] xfs_setattr_size+0x182/0x3e0 [xfs] [ 4174.782540] [<ffffffffa00c375c>] xfs_file_fallocate+0x19c/0x260 [xfs] [ 4174.782546] [<ffffffff811c0229>] ? __sb_start_write+0x49/0xe0 [ 4174.782550] [<ffffffff811bbf59>] do_fallocate+0xf9/0x190 [ 4174.782554] [<ffffffff811bc03c>] SyS_fallocate+0x4c/0x80 [ 4174.782558] [<ffffffff817316ad>] system_call_fastpath+0x1a/0x1f [ 4174.782561] ---[ end trace aeb446f67bc8e89e ]--- === break-fix: 90a8020278c1598fafd071736a0846b38510309c f55fefd1a5a339b1bd08c120b93312d6eb64a9fb To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1402764/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp