search for: kjournald

Hello everybody, Could someone please explain to me what is the difference between kjournald and jbd (precisely, what does each of them do?) Thank you, Alina _________________________________________________________________ Chat with friends online, try MSN Messenger: http://messenger.msn.com

...c-2.7.so[7f20d9c1d000+14a000] Sep 24 14:06:20 storage0 kernel: [650570.916932] ocfs2: Unmounting device (8,17) on (node 0) Sep 24 14:07:04 storage0 kernel: [650622.608756] ocfs2_dlm: Nodes in domain ("E042658E558940E6B05EFE2DBA548DFD"): 0 Sep 24 14:07:04 storage0 kernel: [650622.608818] kjournald starting. Commit interval 5 seconds Sep 24 14:07:04 storage0 kernel: [650622.609924] ocfs2: Mounting device (8,17) on (node 0, slot 0) with ordered data mode. Sep 24 14:07:29 storage0 kernel: [650651.285363] ocfs2_hb_ctl[12160]: segfault at 0 ip 7f17160f3a90 sp 7fff1e7e93e8 error 4 in libc-2.7...

...6:38 krefilld - SW 13 ? 00:00:06 bdflush bdflush SW 14 ? 00:10:26 kupdated schedule_timeout SW 15 ? 00:00:00 scsi_eh_0 down_interruptible SW 16 ? 00:00:00 scsi_eh_1 down_interruptible SW 17 ? 00:00:03 kjournald kjournald SW 134 ? 00:00:00 kjournald kjournald SW 135 ? 00:00:00 kjournald kjournald SW 136 ? 00:00:00 kjournald kjournald SW 137 ? 00:00:03 kjournald kjournald SW 138 ? 00:24:36 kjournald kjournald SW...

I have a system on which kjournald becomes blocked in D state quite often. Looking at a core file we have 5 mounted ext3 filesystems: crash> mount VFSMOUNT SUPERBLK TYPE DEVNAME DIRNAME 10037e07b00 10037e4ec00 rootfs rootfs / 10037e07ec0 10037e4e400 proc /proc...

Hi, I've recently installed ext3 on an 800MB RAID5 (software) array. I am running RedHat Linux 7.1 with the Linux kernel 2.4.12-ac3 on a 1GHz Pentium system with 128MB RAM. I am seeing a significant amount of write operation slowdown when running ext3 (and kjournald), as opposed to my old ext2. The problem seems to be associated with the times that kjournald is accessing the disk. At those moments, my CPU utilization peaks, and network transfer is nearly halted until kjournald is finished. I read in an archive of a Linux Symposium on 20 July, 2000 by Dr. S...

...le writing a file to an ext3 filesystem, i get some drive errors on the console. I guess is a drive/ide related problem more that a ext3 one, but anyway the debug output is here if you want to take a look. And, by the way, what means that DRQ thing?? Oct 7 20:31:36 fargo kernel: (journal.c, 218): kjournald: kjournald wakes Oct 7 20:31:36 fargo kernel: (journal.c, 202): kjournald: commit_sequence=81, commit_request=82 Oct 7 20:31:36 fargo kernel: (journal.c, 205): kjournald: OK, requests differ Oct 7 20:31:36 fargo kernel: (commit.c, 78): journal_commit_transaction: JBD: starting commit of transact...

...t3 filesystems on a CompactFLASH. One is mounted as / and one as /tmp. In my test, I am copying a 100 MB file from /root to /tmp repeatedly. While doing this test, I eventually see the copying stop, and any attempts to access /tmp fail - if I even do ls /tmp the command will hang. I suspect kjournald because of the following ps output: PID PPID WCHAN:20 PCPU %MEM PSR COMM 8847 99 start_this_handle 1.1 0.0 28 pdflush 8853 99 schedule_timeout 0.2 0.0 7 pdflush 188 1 kswapd 0.0 0.0 19 kswapd0 8051 1 mtd_blktrans_...

We run several RH7.2/7.3 servers & recently 2 of them, although still working fine, have started to show kjournald as generally using over 50% cpu% on 'top' - virtually continuously. Free cpu% generally less than 25% now! Both machines are also using software RAID5 EIDE ....... otherwise are standard server installs. Any info on what kjournald is & why it should have recently become so active wou...

...flush] root 7 0.0 0.0 0 0 ? DW Aug27 0:00 [kupdated] root 9 0.0 0.0 0 0 ? SW< Aug27 0:00 [mdrecoveryd] root 10 0.0 0.0 0 0 ? SW< Aug27 0:00 [raid1d] root 11 0.0 0.0 0 0 ? SW Aug27 0:02 [kjournald] root 130 0.0 0.0 0 0 ? SW Aug27 0:00 [kjournald] root 131 0.0 0.0 0 0 ? DW Aug27 0:01 [kjournald] root 374 0.0 0.0 1428 176 ? S Aug27 0:00 syslogd -m 0 root 379 0.0 0.0 1984 396 ? S Aug27 0:00 klogd -2...

...tats coming from vmstat. What initially appeared to be happening is the machine goes into a hard loop in some mod_perl webserver code. Now there still may be an issue with the code, but my code examinations show no possible way this could be happening, but what I'm writing to you about is kjournald. When this apparently looping state is reached, kjournald shows D state for several seconds. During that same time, block-out "bo" in vmstat consistently shows 0. kjournald is choking. Or something. Also, this appears to get a lot of processes looping on write somewhere in the webserve...

...[nfsd_read+477/636] [nfsd3_proc_read+295/388] [nfsd_dispatch+207/406] [svc_process+655/1264] [nfsd+566/944] [arch_kernel_thread+40/56] This sleep_on is the one at line 136 of transcation.c(start_this_handle), where it is waiting for t_state to stop being T_LOCKED. The related kjournald is at: kjournald Call Trace: [sleep_on+75/124] [journal_commit_transaction+357/4044] [do_IRQ+221/236] [.text.lock.sched+131/471] [kjournald+326/540] [commit_timeout+0/12] [arch_kernel_thread+40/56] This sleep_on is at line 87 in commit.c (journal_commit_transacti...

kernel version 2.6.10-1.771_FC2smp We have had quite a few instances of kjournald pegging cpu and thereby effectively knocking out the system's i/o. What can we do to provide more information so that the cause can be identified and fixed? Thanks Christopher

...[ksoftirqd_CPU0] root 4 0.0 0.0 0 0 ? SW 2004 0:00 [kswapd] root 5 0.0 0.0 0 0 ? SW 2004 0:00 [bdflush] root 6 0.0 0.0 0 0 ? SW 2004 0:00 [kupdated] root 7 0.0 0.0 0 0 ? SW 2004 0:00 [kjournald] root 20 0.0 0.0 0 0 ? SW 2004 0:00 [kjournald] root 21 0.0 0.0 0 0 ? SW 2004 0:00 [kjournald] root 22 0.0 0.0 0 0 ? SW 2004 0:02 [kjournald] root 23 0.0 0.0 0 0 ? SW 2004 0:00 [kjournald...

...milar oops/reports). == Oops =================== BUG: unable to handle kernel NULL pointer dereference at 0000000000000008 IP: [<ffffffff80373520>] __journal_remove_journal_head+0x10/0x120 PGD 0 Oops: 0000 [#1] SMP last sysfs file: /sys/class/scsi_host/host0/proc_name CPU 0 Pid: 3834, comm: kjournald Not tainted 2.6.30.1_test #1 RIP: 0010:[<ffffffff80373520>] [<ffffffff80373520>] __journal_remove_journal_head+0x10/0x120 RSP: 0018:ffff880c7ee11d80 EFLAGS: 00010246 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000034 RDX: 0000000000000002 RSI: ffff8804ee82aa20 RDI: ffff...

...Oops: 0000 CPU: 0 EIP: 0010:[<c017aed2>] Not tainted Using defaults from ksymoops -t elf32-i386 -a i386 EFLAGS: 00010287 eax: 00000000 ebx: 00000000 ecx: c20984f0 edx: c2098390 esi: 00000000 edi: c5e5bfa0 ebp: c5b6c0c0 esp: c9849e4c ds: 0018 es: 0018 ss: 0018 Process kjournald (pid: 277, stackpage=c9849000) Stack: c2098390 00000000 c63510e0 c63510e0 00000000 c1360000 c1360108 00000000 c0178a30 c1360000 c63510e0 00000004 001be827 00000296 c1360094 00000000 00000000 00000000 00000000 c31576a0 c5e5b5b0 001be827 c1d20780 c9ae10e0 Call Trace: [<c0178a30&gt...

...e ext3-maintainers (Stephen, Andreas, Andrew) to have a look at it and submit it to Marcelo and Linux for inclusion. (2.4 is for now for me more important than 2.5). Patch ----- On every mount of ext3 (and I suppose all journaling filesystems which use jbd, although I didn't test this) a new kjournald is created. All kjournald share the same file-information. Before this patch it would accumulativly fetch open files from the calling process (normally mount); I verified this via (in bash) exec 30< /etc/services mount <partition> /mnt/tmp ps -aux | grep kjournald ls -la <pid of an...

...onally, I can't play mp3 files from a samba share on this machine without winamp pausing every 5-10 seconds. If I copy the mp3 files to the local hard drive or to a samba share on a Redhat 6.2 system (running ext2fs), the files will play fine. I have noticed that cp/smbd seems to deadlock with kjournald. I haven't modifed any of the ext3fs settings. Can I improve performance by changing the journal settings? I think the default is to update the journal every 5 seconds? If I increase that to 60 seconds would that improve performance? I've updated the system via RHN, but the performance is...

...t_state ip_conntrack iptable_filter ip_tables w83627hf eeprom lm85 i2c_sensor i2c_isa md5 ipv6 video button battery ac ohci_hcd i2c_amd8111 i2c_amd756 i2c_core shpchp e100 mii tg3 floppy sg dm_snapshot dm_zero dm_mirror ext3 jbd raid1 dm_mod gdth sata_sil libata sd_mod scsi_mod Pid: 1485, comm: kjournald Not tainted 2.6.12-1.1398_FC4smp RIP: 0010:[<ffffffff8807d56f>] <ffffffff8807d56f>{:jbd:__journal_drop_transaction+319} RSP: 0018:ffff8100fade9de8 EFLAGS: 00010292 RAX: 0000000000000074 RBX: ffff8100c5f0ea80 RCX: ffffffff8042d908 RDX: ffffffff8042d908 RSI: 0000000000000296 RDI: ffffff...

...Oops: 0002 CPU: 0 EIP: 0010:[<c0130956>] Not tainted Using defaults from ksymoops -t elf32-i386 -a i386 EFLAGS: 00010246 eax: 00000000 ebx: c18054f0 ecx: e8762000 edx: e876205c esi: 00000000 edi: 00000000 ebp: 00000000 esp: e8763bdc ds: 0018 es: 0018 ss: 0018 Process kjournald (pid: 10086, stackpage=e8763000) Stack: 00000001 00000001 00000046 c01e907c 00000000 f7a970b8 f7bfa018 c2842cc4 eac6f000 c1000020 eac6f000 c012db6a c281deec 00000000 cccccccd c2848c00 c012ef19 c2842cc4 eac6f000 00000019 c2842ccc c2842cd4 c02b5224 e8762000 Call Trace: [<c01e907c&...

...e ext3-maintainers (Stephen, Andreas, Andrew) to have a look at it and submit it to Marcelo and Linux for inclusion. (2.4 is for now for me more important than 2.5). Patch ----- On every mount of ext3 (and I suppose all journaling filesystems which use jbd, although I didn't test this) a new kjournald is created. All kjournald share the same file-information. Before this patch it would accumulativly fetch open files from the calling process (normally mount); I verified this via (in bash) exec 30< /etc/services mount <partition> /mnt/tmp ps -aux | grep kjournald ls -la <pid of an...