I have used strace on described process (sync and umount): This is "sudo sync" proces: $ sudo strace -p 24933 Process 24933 attached select(6, [3 5], [], NULL, NULL This one is umount: $ sudo strace -p 12103 Process 12103 attached By for now. ----- luvar@xxxxxxxxxxxx wrote: > Hi, > dmesg is probably useles: > > Probably some logs after mounting...: > > # dmesg | grep EXT > EXT3-fs (md2): mounted filesystem with ordered data mode > EXT3-fs (md2): using internal journal > EXT3-fs (dm-2): using internal journal > EXT3-fs (dm-2): mounted filesystem with ordered data mode > EXT4-fs (dm-8): mounted filesystem with ordered data mode. Opts: > (null) > EXT4-fs (dm-3): mounted filesystem with ordered data mode. Opts: > (null) > EXT4-fs (dm-12): mounted filesystem without journal. Opts: (null) > EXT4-fs (dm-8): re-mounted. Opts: commit=0 > EXT4-fs (dm-3): re-mounted. Opts: commit=0 > EXT4-fs (dm-12): re-mounted. Opts: commit=0 > EXT4-fs (dm-28): mounted filesystem with ordered data mode. Opts: > (null) > EXT3-fs (dm-10): using internal journal > EXT3-fs (dm-10): mounted filesystem with ordered data mode > > On last few lines, there is some info about usb key used on thic pc: > > # dmesg | tail -n 30 > sd 14:0:0:0: [sdg] Asking for cache data failed > sd 14:0:0:0: [sdg] Assuming drive cache: write through > sdg: sdg1 > sd 14:0:0:0: [sdg] Asking for cache data failed > sd 14:0:0:0: [sdg] Assuming drive cache: write through > sd 14:0:0:0: [sdg] Attached SCSI disk > mdadm: sending ioctl 1261 to a partition! > mdadm: sending ioctl 1261 to a partition! > usb 2-4.4: USB disconnect, device number 10 > hda-intel: IRQ timing workaround is activated for card #0. Suggest a > bigger bdl_pos_adj. > usb 1-1: new high-speed USB device number 2 using ehci_hcd > usb 1-1: New USB device found, idVendor=0951, idProduct=1687 > usb 1-1: New USB device strings: Mfr=1, Product=2, SerialNumber=3 > usb 1-1: Product: DT R400 > usb 1-1: Manufacturer: Kingston > usb 1-1: SerialNumber: 0018F30C7FX10B000XX029 > scsi15 : usb-storage 1-1:1.0 > scsi 15:0:0:0: Direct-Access Kingston DT R400 PMAP PQ: 0 > ANSI: 0 CCS > sd 15:0:0:0: Attached scsi generic sg6 type 0 > sd 15:0:0:0: [sdg] 7774208 512-byte logical blocks: (3.98 GB/3.70 > GiB) > sd 15:0:0:0: [sdg] Write Protect is off > sd 15:0:0:0: [sdg] Mode Sense: 23 00 00 00 > sd 15:0:0:0: [sdg] No Caching mode page present > sd 15:0:0:0: [sdg] Assuming drive cache: write through > sd 15:0:0:0: [sdg] No Caching mode page present > sd 15:0:0:0: [sdg] Assuming drive cache: write through > sdg: sdg1 sdg2 > sd 15:0:0:0: [sdg] No Caching mode page present > sd 15:0:0:0: [sdg] Assuming drive cache: write through > sd 15:0:0:0: [sdg] Attached SCSI removable disk > > Other lines from dmesg seems not relevant. Should I post them too? > > PS: Writing to disk from jbd2/dm-3-8 still active (iotop shows it > still on top of I/O activity). > > LuVar > > ----- "Theodore Ts'o" <tytso@xxxxxxx> wrote: > > > On Mon, Jul 30, 2012 at 08:26:20PM +0100, LuVar wrote: > > > Hi, > > > I have seriouse issue here. I have copyied about 7GB files to one > of > > my ext4 partitions and from that point of time there is sustained > > write to that partition from jbd2/dm-3-8 process. I have lunched > "sudo > > sync" command (about day ago :) and a few hours a after sync start, > I > > have tryied to use umount on that partition... Booth of them are > still > > running... > > > > > > I have no serious data there, but if I could be helpfull in > > bugreport, give me some info what to do. > > > > Try running the dmesg command, and see if there's anything > > interesting > > there. If you're not sure if it's interesting, send it to us and > we > > can take a quick look at it. > > > > Regards, > > > > - Ted -- Ing. Ľubomír Varga +421 (0)908 541 700 varga@xxxxxxxxxxxx www.plaintext.sk -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
