From mboxrd@z Thu Jan 1 00:00:00 1970 From: Ritesh Raj Sarraf Subject: Re: dm-crypt low performance Date: Tue, 13 Jan 2009 23:07:45 +0530 Message-ID: <200901132307.47381.rrs@researchut.com> References: <0ths36-dce.ln1@news.researchut.com> <496CB858.70803@redhat.com> Reply-To: device-mapper development Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="===============0334662826==" Return-path: In-Reply-To: <496CB858.70803@redhat.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: dm-devel-bounces@redhat.com Errors-To: dm-devel-bounces@redhat.com To: Milan Broz Cc: dm-crypt@saout.de, device-mapper development List-Id: dm-devel.ids --===============0334662826== Content-Type: multipart/signed; boundary="nextPart615940068.Sy5SZTDCAf"; protocol="application/pgp-signature"; micalg=pgp-sha1 Content-Transfer-Encoding: 7bit --nextPart615940068.Sy5SZTDCAf Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Content-Disposition: inline On Tuesday 13 Jan 2009 21:20:48 Milan Broz wrote: > Ritesh Raj Sarraf wrote: > > I'm using dm-crypt on an external USB enclosure ide hdd. I copied 20Gb = of > > data on to the encrypted device and am suffering severe performance > > penalty. After a couple of seconds, all processes involved in the I/O > > keep stalling. They periodically resume, just for a couple of seconds a= nd > > then again stall. > > > > Running linux 2.6.26. > > Please can you try it without dm-crypt involved? > Just copy 20Gb to your unencrypted disk attached through USB. > > I saw this problem with plain USB attached storage some time ago too. > > There is only one thread in dm-crypt and it is waiting for io_schedule, > so I think it is not dm-crypt who is blocking it, but the layer > below the dm-crypt. So I tried the following. Copied 20Gb of data to a partition on the External USB disk. Here are the=20 results: =2D---total-cpu-usage---- -dsk/total- -net/total- ---paging-- ---system-- usr sys idl wai hiq siq| read writ| recv send| in out | int csw=20 11 10 0 79 0 1| 22M 39M|2864B 2454B| 0 0 |2048 3793=20 12 9 1 76 0 1| 23M 39M| 81k 8686B| 0 0 |2166 3635=20 13 8 16 62 0 1| 27M 43M| 12k 5036B| 0 0 |2127 3526=20 14 8 37 40 0 1| 24M 42M|7138B 5140B| 0 0 |2047 3415=20 7 8 47 36 0 0| 35M 40M|2451B 2538B| 0 0 |2002 3179=20 4 9 49 37 0 0| 41M 40M|4081B 276B| 0 0 |1974 2956=20 1 9 50 38 0 1| 40M 40M| 0 276B| 0 0 |1912 2774=20 1 8 50 39 0 1| 40M 40M| 92B 0 | 0 0 |2018 2958=20 2 9 48 39 0 0| 44M 40M| 362B 276B| 0 0 |2097 3191=20 8 8 45 38 0 1| 27M 33M| 23k 4181B| 0 0 |1919 3009 8 8 50 34 0 0| 31M 26M| 10k 2570B| 0 0 |1760 2724 21 11 33 30 0 3| 40M 40M| 204k 17k| 0 0 |2360 3845 13 8 43 36 0 0| 35M 39M| 12k 5354B| 0 0 |2083 3349 16 8 41 35 0 0| 30M 35M|5738B 4158B| 0 0 |1904 3118 8 10 47 33 0 1| 40M 37M|1718B 1255B| 0 0 |1932 3130 3 9 49 39 0 1| 40M 40M| 0 0 | 0 0 |2124 3065 4 9 46 41 0 0| 40M 40M| 0 0 | 0 0 |1971 3088 6 9 46 40 0 0| 40M 41M| 850B 723B| 0 0 |2059 3155 3 10 46 39 0 1| 40M 42M|1958B 1651B| 0 0 |2054 3217 8 12 41 38 0 1| 41M 39M|2741B 1342B| 0 0 |2083 3647 4 8 47 40 0 0| 39M 39M|2062B 1299B| 0 0 |2060 3328 Looks good. Then I tried copying 20Gb of data to the dm-crypted partition on the same U= SB=20 disk. Here are the results: =2D---total-cpu-usage---- -dsk/total- -net/total- ---paging-- ---system-- usr sys idl wai hiq siq| read writ| recv send| in out | int csw=20 3 28 0 67 0 1| 20M 41M| 0 0 | 0 0 |1972 3036 25 29 0 44 0 2| 39M 42M| 0 78B| 52k 0 |1800 3612 41 22 0 35 0 1|8952k 40M| 54B 65B| 0 0 |1493 3471 21 24 0 54 0 1|2040k 42M|1469B 1591B| 0 0 |2180 5170 16 24 0 59 0 1| 14M 44M| 25k 4962B| 0 0 |1991 4541 12 11 17 58 0 2| 36M 19M| 28k 2964B| 44k 0 |2351 3774 19 28 14 37 0 1| 40M 19M| 72k 5062B| 0 0 |1707 3906 14 29 0 54 0 3| 58M 42M| 108k 7586B| 0 0 |2431 4646 8 23 0 67 0 2| 44M 35M| 77k 4188B| 0 0 |2948 4587 22 19 6 50 0 1| 30M 38M| 41k 2666B| 0 0 |2127 3924 6 33 29 31 0 1| 52M 38M|7628B 1511B| 0 0 |2055 3375 4 25 0 70 0 1|4624k 39M|4447B 1429B| 0 0 |1808 2749 10 32 3 52 1 2| 53M 42M| 27k 2296B| 0 0 |2144 4474 5 17 0 77 0 1| 88k 38M|5515B 420B| 0 0 |2261 3338 6 24 1 67 0 1| 66M 37M| 0 0 | 0 0 |2741 4099 2 27 17 53 0 1| 64M 32M| 0 0 | 32k 0 |2331 3356 2 35 17 43 0 2| 71M 39M| 0 0 | 0 0 |2460 3713 3 33 5 57 0 2| 69M 40M| 189B 202B| 0 0 |2212 3366 1 36 0 61 0 1| 72M 42M| 0 0 | 0 0 |2296 3481 1 35 0 62 0 2| 69M 40M| 0 65B| 0 0 |2235 3425 2 24 0 73 0 1| 37M 39M| 0 0 | 0 0 |2033 2912 ^C The above 2 results are from a 2.5" SATA disk attached to a USB 2.0 enclosu= re=20 which has one USB connector connected to the laptop's USB port. This is a=20 self-powered disk enclosure. Filesystems is use were, vfat for the former=20 result and ext3 for the latter. Below are results from a different disk. =2D---total-cpu-usage---- -dsk/total- -net/total- ---paging-- ---system-- = =20 usr sys idl wai hiq siq| read writ| recv send| in out | int csw =20 10 17 26 44 0 2| 32M 35M| 0 0 | 0 0 |3889 18k 12 20 34 35 0 0| 34M 36M| 0 0 | 0 0 |3923 19k 14 20 21 42 0 1| 36M 36M| 0 648B| 0 0 |4036 20k 14 22 21 41 0 0| 45M 37M| 0 324B| 0 0 |4140 24k 15 21 10 52 0 2| 35M 35M| 448B 520B| 0 0 |3947 19k 10 19 31 40 0 0| 30M 35M| 0 0 | 0 0 |3885 17k 18 22 14 46 0 0| 36M 37M| 92B 0 | 0 0 |4029 21k 16 21 18 43 0 1| 40M 36M| 92B 0 | 0 0 |3966 21k 11 23 28 37 0 0| 37M 36M| 92B 0 | 0 0 |3986 20k 11 17 31 41 0 0| 30M 35M| 0 0 | 0 0 |3893 19k 12 19 6 62 0 1| 29M 34M| 0 0 | 0 0 |3895 18k 12 19 0 67 0 2| 29M 35M| 0 0 | 0 0 |3974 17k 17 15 0 66 0 1| 15M 33M| 0 0 | 0 0 |3802 11k 32 17 5 46 0 0| 27M 36M| 108B 357B| 0 0 |3943 14k 17 14 2 65 0 1| 14M 33M| 0 0 | 0 0 |3884 11k 21 20 17 40 0 2| 28M 35M| 0 0 | 0 0 |3916 17k 17 24 8 50 0 0| 40M 37M| 55B 96B| 0 0 |3982 22k 19 27 13 41 0 0| 52M 37M| 0 0 | 0 0 |4265 29k 20 25 13 42 0 0| 40M 36M| 0 0 | 0 0 |3979 22k 21 28 8 41 1 2| 52M 36M| 420B 520B| 0 0 |4082 27k 20 32 16 31 0 0| 68M 38M| 0 0 | 0 0 |4343 33k^C This result is from a 2.5" SATA disk connected to a USB 2.0 enclosure with = 2=20 USB connectors connected to the laptop. The filesystem is fuse (ntfs-3g). Looks good. Here's the interesting one. =2D---total-cpu-usage---- -dsk/total- -net/total- ---paging-- ---system-- usr sys idl wai hiq siq| read writ| recv send| in out | int csw 11 3 82 2 0 1|1655k 267k| 0 0 |5486B 12k|1259 1863 16 23 25 35 0 0|1360k 0 |3022B 336B| 32k 0 | 972 3043 2 44 15 40 0 0| 64k 0 | 0 0 | 0 0 | 902 1141 4 3 93 0 0 0| 0 0 | 0 0 | 0 0 | 769 1235 5 2 92 0 0 0| 0 368k| 426B 520B| 0 0 | 557 1100 4 3 93 0 0 0| 0 0 | 92B 0 | 0 0 | 506 1041 4 3 94 0 0 0| 0 0 | 0 0 | 0 0 | 628 1005 4 2 93 0 0 0| 0 0 | 0 0 | 0 0 | 547 1036 6 2 92 0 0 0| 0 0 | 0 0 | 0 0 | 574 995 4 2 94 0 0 0| 0 0 | 0 0 | 0 0 | 593 1126 6 3 91 0 0 0| 0 0 | 141B 84B| 0 0 | 684 1165 4 3 93 0 0 0| 0 0 | 0 0 | 0 0 | 514 1044 4 2 93 0 0 0| 0 0 | 0 0 | 0 0 | 485 850 4 3 92 0 0 0| 0 0 | 227B 484B| 0 0 | 645 1116 3 2 94 0 0 0| 0 0 | 0 0 | 0 0 | 619 1009 4 3 92 1 0 0|8192B 1472k| 108B 292B| 0 0 | 608 1072 5 3 92 0 0 0| 0 0 | 187B 72B| 0 0 | 786 1208 4 2 94 0 0 0| 0 0 | 0 0 | 0 0 | 587 1098 3 3 94 0 0 0| 0 0 | 0 0 | 0 0 | 500 939 ^C This result is from a *3.5"* ATA disk connected to a USB 2.0 enclosure with= 2=20 USB connectors connected to the laptop. The enclosure is externally powered= =2E=20 The disk is partition-less. The entire disk (/dev/sdb) is LUKS encrypted. The filesystem is ext3. As soon as I initiated the I/O, the performance went down (as mentioned in = the=20 above result). Also, the usb port was reset immediately which resulted in a= =20 read-only filesystem. Here are the relevant logs. [44125.008940] usb 5-8: new high speed USB device using ehci_hcd and addres= s=20 10 =20 [44125.375160] usb 4-2: new full speed USB device using uhci_hcd and addres= s 2 =20 [44125.488926] usb 4-2: device descriptor read/64, error -71 = =20 [44125.717839] usb 4-2: not running at top speed; connect to a high speed h= ub =20 [44125.732838] usb 4-2: configuration #1 chosen from 1 choice = =20 [44125.735518] scsi5 : SCSI emulation for USB Mass Storage devices = =20 [44125.736912] usb 4-2: New USB device found, idVendor=3D05e3, idProduct=3D= 0702 =20 [44125.736928] usb 4-2: New USB device strings: Mfr=3D0, Product=3D1,=20 SerialNumber=3D0 =20 [44125.736933] usb 4-2: Product: USB TO IDE = =20 [44125.737807] usb-storage: device found at 2 = =20 [44125.737814] usb-storage: waiting for device to settle before scanning = =20 [44130.771126] usb-storage: device scan complete = =20 [44130.774592] scsi 5:0:0:0: Direct-Access ST325082 4A 08= 11=20 PQ: 0 ANSI: 0 =20 [44130.780522] sd 5:0:0:0: [sdb] 488397168 512-byte hardware sectors (25005= 9=20 MB) =20 [44130.787520] sd 5:0:0:0: [sdb] Test WP failed, assume Write Enabled = =20 [44130.787520] sd 5:0:0:0: [sdb] Assuming drive cache: write through = =20 [44130.792520] sd 5:0:0:0: [sdb] 488397168 512-byte hardware sectors (25005= 9=20 MB) =20 [44130.799520] sd 5:0:0:0: [sdb] Test WP failed, assume Write Enabled = =20 [44130.799520] sd 5:0:0:0: [sdb] Assuming drive cache: write through = =20 [44130.799520] sdb: unknown partition table = =20 [44130.830056] sd 5:0:0:0: [sdb] Attached SCSI disk = =20 [44130.830056] sd 5:0:0:0: Attached scsi generic sg2 type 0 = =20 [44273.057272] kjournald starting. Commit interval 5 seconds = =20 [44273.064954] EXT3 FS on dm-2, internal journal = =20 [44273.065232] EXT3-fs: mounted filesystem with ordered data mode. = =20 [44306.991719] usb 4-2: reset full speed USB device using uhci_hcd and addr= ess=20 2 =20 [44307.232054] usb 4-2: reset full speed USB device using uhci_hcd and addr= ess=20 2 =20 [44307.468171] usb 4-2: reset full speed USB device using uhci_hcd and addr= ess=20 2 =20 [44307.600787] usb 4-2: failed to restore interface 0 altsetting 0 (error= =3D-71) =20 [44307.601609] usb 4-2: USB disconnect, address 2 = =20 [44307.601609] sd 5:0:0:0: [sdb] Result: hostbyte=3DDID_ERROR=20 driverbyte=3DDRIVER_OK,SUGGEST_OK =20 [44307.601609] end_request: I/O error, dev sdb, sector 248121664 = =20 [44307.601609] Buffer I/O error on device dm-2, logical block 31015079 = =20 [44307.601609] lost page write due to I/O error on dm-2 = =20 [44307.601609] Buffer I/O error on device dm-2, logical block 31015080 = =20 [44307.601609] lost page write due to I/O error on dm-2 = =20 [44307.601609] Buffer I/O error on device dm-2, logical block 31015081 = =20 [44307.601609] lost page write due to I/O error on dm-2 = =20 [44307.601609] Buffer I/O error on device dm-2, logical block 31015082 = =20 [44307.601609] lost page write due to I/O error on dm-2 = =20 [44307.601635] Buffer I/O error on device dm-2, logical block 31015083 = =20 [44307.601639] lost page write due to I/O error on dm-2 = =20 [44307.601648] Buffer I/O error on device dm-2, logical block 31015084 = =20 [44307.602572] lost page write due to I/O error on dm-2 = =20 [44307.602572] Buffer I/O error on device dm-2, logical block 31015085 = =20 [44307.602572] lost page write due to I/O error on dm-2 = =20 [44307.602572] Buffer I/O error on device dm-2, logical block 31015086 = =20 [44307.602572] lost page write due to I/O error on dm-2 = =20 [44307.602572] sd 5:0:0:0: [sdb] Result: hostbyte=3DDID_ERROR=20 driverbyte=3DDRIVER_OK,SUGGEST_OK =20 [44307.602572] end_request: I/O error, dev sdb, sector 248121728 = =20 [44307.602572] Buffer I/O error on device dm-2, logical block 31015087 = =20 [44307.602572] lost page write due to I/O error on dm-2 = =20 [44307.602572] Buffer I/O error on device dm-2, logical block 31015088 = =20 [44307.602572] lost page write due to I/O error on dm-2 = =20 [44307.602572] sd 5:0:0:0: [sdb] Result: hostbyte=3DDID_ERROR=20 driverbyte=3DDRIVER_OK,SUGGEST_OK =20 [44307.602572] end_request: I/O error, dev sdb, sector 248121792 = =20 [44307.602572] sd 5:0:0:0: [sdb] Result: hostbyte=3DDID_ERROR=20 driverbyte=3DDRIVER_OK,SUGGEST_OK =20 [44307.602572] end_request: I/O error, dev sdb, sector 248121856 = =20 [44307.602572] sd 5:0:0:0: [sdb] Result: hostbyte=3DDID_ERROR=20 driverbyte=3DDRIVER_OK,SUGGEST_OK =20 [44307.602572] end_request: I/O error, dev sdb, sector 248121920 = =20 [44307.602573] sd 5:0:0:0: [sdb] Result: hostbyte=3DDID_ERROR=20 driverbyte=3DDRIVER_OK,SUGGEST_OK =20 [44307.602573] end_request: I/O error, dev sdb, sector 248121984 = =20 [44307.603601] sd 5:0:0:0: [sdb] Result: hostbyte=3DDID_NO_CONNECT=20 driverbyte=3DDRIVER_OK,SUGGEST_OK =20 [44307.603609] end_request: I/O error, dev sdb, sector 248122048 = =20 [44307.604568] sd 5:0:0:0: [sdb] Result: hostbyte=3DDID_NO_CONNECT=20 driverbyte=3DDRIVER_OK,SUGGEST_OK =20 [44307.604568] end_request: I/O error, dev sdb, sector 248122112 = =20 [44307.625509] EXT3-fs error (device dm-2): read_block_bitmap: Cannot read= =20 block bitmap - block_group =3D 966, block_bitmap =3D 31653888 = = =20 [44307.763898] EXT3-fs error (device dm-2): read_block_bitmap: Cannot read= =20 block bitmap - block_group =3D 966, block_bitmap =3D 31653888 = = =20 [44307.763898] ------------[ cut here ]------------ = =20 [44307.763898] WARNING: at fs/buffer.c:1186 mark_buffer_dirty+0x20/0x67() = =20 [44307.763898] Modules linked in: sha256_generic aes_i586 aes_generic cbc=20 nls_utf8 nls_cp437 vfat fat nls_base usb_storage usbhid hid ff_memless tcp_= diag=20 inet_diag tun nvidia(P) rfcomm l2cap bluetooth xt_limit nf_conntrack_ipv6 i= pv6=20 nf_conntrack_proto_dccp ts_kmp nf_conntrack_amanda nf_conntrack_irc=20 nf_conntrack_sip nf_conntrack_netbios_ns nf_conntrack_pptp=20 nf_conntrack_proto_gre nf_conntrack_netlink nfnetlink nf_conntrack_ftp=20 nf_conntrack_tftp nf_conntrack_sane xt_conntrack nf_conntrack_proto_sctp=20 nf_conntrack_proto_udplite nf_conntrack_h323 acpi_cpufreq cpufreq_conservat= ive=20 cpufreq_stats cpufreq_userspace cpufreq_powersave ipt_MASQUERADE iptable_na= t=20 nf_nat nf_conntrack_ipv4 xt_state nf_conntrack ipt_REJECT xt_tcpudp=20 iptable_filter ip_tables x_tables bridge kvm_intel kvm fuse configfs loop=20 firewire_sbp2 dm_crypt snd_hda_intel snd_usb_audio snd_pcm_oss snd_mixer_os= s=20 snd_pcm snd_usb_lib snd_hwdep arc4 snd_seq_dummy ecb crypto_blkcipher=20 snd_seq_oss snd_seq_midi snd_rawmidi uvcvideo iwl3945 snd_seq_midi_event=20 compat_ioctl32 snd_seq joydev mac80211 videodev i2c_i801 snd_timer=20 snd_seq_device iTCO_wdt led_class serio_raw snd v4l1_compat intel_agp wmi=20 rng_core i2c_core ac cfg80211 psmouse pcspkr agpgart button battery video=20 output soundcore snd_page_alloc evdev dcdbas ext3 jbd mbcache dm_mirror dm_= log=20 dm_snapshot dm_mod sg sr_mod cdrom sd_mod ata_generic ata_piix firewire_ohc= i=20 firewire_core libata scsi_mod crc_itu_t dock b44 ide_pci_generic ide_core=20 ohci1394 sdhci ieee1394 mmc_core ricoh_mmc ssb pcmcia pcmcia_core=20 firmware_class mii ehci_hcd uhci_hcd usbcore thermal processor fan thermal_= sys =20 [44307.763898] Pid: 8632, comm: cp Tainted: P 2.6.26-custom #1 = =20 [44307.763921] [] warn_on_slowpath+0x40/0x79 = =20 [44307.763921] [] check_preempt_wakeup+0x97/0xd1 = =20 [44307.763921] [] try_to_wake_up+0xe8/0xf1 = =20 [44307.763922] [] vt_console_print+0x32/0x278 = =20 [44307.763922] [] vt_console_print+0x32/0x278 = =20 [44307.763922] [] vt_console_print+0x0/0x278 = =20 [44307.763937] [] __call_console_drivers+0x4f/0x5b = =20 [44307.763950] [] up+0x9/0x2a = =20 [44307.763969] [] release_console_sem+0x172/0x18b = =20 [44307.764087] [] mark_buffer_dirty+0x20/0x67 = =20 [44307.764102] [] ext3_commit_super+0x3a/0x4e [ext3] = =20 [44307.764147] [] ext3_handle_error+0x6e/0x8e [ext3] = =20 [44307.764178] [] ext3_error+0x3a/0x40 [ext3] = =20 [44307.764237] [] read_block_bitmap+0x90/0x115 [ext3] = =20 [44307.764307] [] ext3_new_blocks+0x199/0x569 [ext3] = =20 [44307.764395] [] ext3_get_blocks_handle+0x332/0x785 [ext3] = =20 [44307.764395] [] __find_get_block+0x162/0x16c = =20 [44307.764395] [] __rmqueue+0x16/0x1b5 = =20 [44307.764395] [] ext3_get_block+0x9f/0xd3 [ext3] = =20 [44307.764469] [] __block_prepare_write+0x16e/0x373 = =20 [44307.764469] [] block_write_begin+0x6c/0xc3 = =20 [44307.764469] [] ext3_get_block+0x0/0xd3 [ext3] = =20 [44307.764469] [] ext3_write_begin+0xc1/0x168 [ext3] = =20 [44307.764487] [] ext3_get_block+0x0/0xd3 [ext3] = =20 [44307.764896] [] generic_file_buffered_write+0xfa/0x56a = =20 [44307.764997] [] journal_stop+0x145/0x14e [jbd] = =20 [44307.765065] [] __generic_file_aio_write_nolock+0x3fa/0x445 = =20 [44307.765141] [] mnt_want_write+0x1a/0x5e = =20 [44307.765157] [] mnt_drop_write+0x1a/0xb2 = =20 [44307.765172] [] generic_file_aio_read+0x474/0x4fa = =20 [44307.765203] [] generic_file_aio_write+0x60/0xb7 = =20 [44307.765253] [] ext3_file_write+0x19/0x85 [ext3] = =20 [44307.765289] [] do_sync_write+0xc0/0x107 = =20 [44307.765369] [] autoremove_wake_function+0x0/0x2d = =20 [44307.765394] [] hrtick_set+0x7b/0xe6 = =20 [44307.765455] [] do_sync_write+0x0/0x107 = =20 [44307.765469] [] vfs_write+0x84/0x121 = =20 [44307.765495] [] sys_write+0x3c/0x63 = =20 [44307.765525] [] syscall_call+0x7/0xb = =20 [44307.765894] =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D = =20 [44307.765894] ---[ end trace 2a0ce193654d04fb ]--- = =20 [44307.884076] usb 4-2: new full speed USB device using uhci_hcd and addres= s 3 =20 [44308.017388] usb 4-2: device descriptor read/all, error -71 = =20 [44308.026550] EXT3-fs error (device dm-2): read_block_bitmap: Cannot read= =20 block bitmap - block_group =3D 966, block_bitmap =3D 31653888 = = =20 [44308.047000] EXT3-fs error (device dm-2): read_block_bitmap: Cannot read= =20 block bitmap - block_group =3D 966, block_bitmap =3D 31653888 = = =20 [44308.056026] EXT3-fs error (device dm-2): read_block_bitmap: Cannot read= =20 block bitmap - block_group =3D 966, block_bitmap =3D 31653888 = = =20 [44308.075044] EXT3-fs error (device dm-2): read_block_bitmap: Cannot read= =20 block bitmap - block_group =3D 966, block_bitmap =3D 31653888 = = =20 [44308.090090] EXT3-fs error (device dm-2): read_block_bitmap: Cannot read= =20 block bitmap - block_group =3D 966, block_bitmap =3D 31653888 = = =20 [44308.102860] EXT3-fs error (device dm-2): read_block_bitmap: Cannot read= =20 block bitmap - block_group =3D 966, block_bitmap =3D 31653888 = = =20 [44308.117901] EXT3-fs error (device dm-2): read_block_bitmap: Cannot read= =20 block bitmap - block_group =3D 966, block_bitmap =3D 31653888 = = =20 [44308.122647] usb 4-2: new full speed USB device using uhci_hcd and addres= s 4 =20 [44308.127745] EXT3-fs error (device dm-2): read_block_bitmap: Cannot read= =20 block bitmap - block_group =3D 966, block_bitmap =3D 31653888 = = =20 [44308.136581] EXT3-fs error (device dm-2): read_block_bitmap: Cannot read= =20 block bitmap - block_group =3D 966, block_bitmap =3D 31653888 = = =20 [44308.150331] EXT3-fs error (device dm-2): read_block_bitmap: Cannot read= =20 block bitmap - block_group =3D 966, block_bitmap =3D 31653888 = = =20 [44308.159068] EXT3-fs error (device dm-2): read_block_bitmap: Cannot read= =20 block bitmap - block_group =3D 966, block_bitmap =3D 31653888 = = =20 [44308.168617] EXT3-fs error (device dm-2): read_block_bitmap: Cannot read= =20 block bitmap - block_group =3D 966, block_bitmap =3D 31653888 = = =20 [44308.185580] EXT3-fs error (device dm-2): read_block_bitmap: Cannot read= =20 block bitmap - block_group =3D 966, block_bitmap =3D 31653888 = = =20 [44308.200611] EXT3-fs error (device dm-2): read_block_bitmap: Cannot read= =20 block bitmap - block_group =3D 966, block_bitmap =3D 31653888 = = =20 [44308.204343] EXT3-fs error (device dm-2): read_block_bitmap: Cannot read= =20 block bitmap - block_group =3D 966, block_bitmap =3D 31653888 = = =20 [44308.217310] EXT3-fs error (device dm-2): read_block_bitmap: Cannot read= =20 block bitmap - block_group =3D 966, block_bitmap =3D 31653888 = = =20 [44308.228915] EXT3-fs error (device dm-2): read_block_bitmap: Cannot read= =20 block bitmap - block_group =3D 966, block_bitmap =3D 31653888 = = =20 [44308.254557] EXT3-fs error (device dm-2): read_block_bitmap: Cannot read= =20 block bitmap - block_group =3D 966, block_bitmap =3D 31653888 = = =20 [44308.270601] EXT3-fs error (device dm-2): read_block_bitmap: Cannot read= =20 block bitmap - block_group =3D 966, block_bitmap =3D 31653888 = = =20 [44308.300419] EXT3-fs error (device dm-2): read_block_bitmap: Cannot read= =20 block bitmap - block_group =3D 966, block_bitmap =3D 31653888 = = =20 [44308.301453] usb 4-2: string descriptor 0 read error: -71 = =20 [44308.301572] usb 4-2: configuration #1 chosen from 1 choice = =20 [44308.308850] usb 4-2: can't set config #1, error -71 = =20 [44308.308899] usb 4-2: New USB device found, idVendor=3D05e3, idProduct=3D= 0702 =20 [44308.308899] usb 4-2: New USB device strings: Mfr=3D0, Product=3D1,=20 SerialNumber=3D0 =20 [44308.328418] EXT3-fs error (device dm-2): read_block_bitmap: Cannot read= =20 block bitmap - block_group =3D 966, block_bitmap =3D 31653888 = = =20 [44308.336523] EXT3-fs error (device dm-2): read_block_bitmap: Cannot read= =20 block bitmap - block_group =3D 966, block_bitmap =3D 31653888 = = =20 [44308.367727] EXT3-fs error (device dm-2): read_block_bitmap: Cannot read= =20 block bitmap - block_group =3D 966, block_bitmap =3D 31653888 = = =20 [44308.384314] EXT3-fs error (device dm-2): read_block_bitmap: Cannot read= =20 block bitmap - block_group =3D 966, block_bitmap =3D 31653888 = = =20 [44308.399502] EXT3-fs error (device dm-2): read_block_bitmap: Cannot read= =20 block bitmap - block_group =3D 966, block_bitmap =3D 31653888 = = =20 [44308.423943] EXT3-fs error (device dm-2): read_block_bitmap: Cannot read= =20 block bitmap - block_group =3D 966, block_bitmap =3D 31653888 = = =20 [44308.439201] EXT3-fs error (device dm-2): read_block_bitmap: Cannot read= =20 block bitmap - block_group =3D 966, block_bitmap =3D 31653888 = = =20 [44308.450486] EXT3-fs error (device dm-2): read_block_bitmap: Cannot read= =20 block bitmap - block_group =3D 966, block_bitmap =3D 31653888 = = =20 [44308.460527] EXT3-fs error (device dm-2): read_block_bitmap: Cannot read= =20 block bitmap - block_group =3D 966, block_bitmap =3D 31653888 = = =20 [44308.464059] EXT3-fs error (device dm-2): read_block_bitmap: Cannot read= =20 block bitmap - block_group =3D 966, block_bitmap =3D 31653888 = = =20 [44308.477362] EXT3-fs error (device dm-2): read_block_bitmap: Cannot read= =20 block bitmap - block_group =3D 966, block_bitmap =3D 31653888 = = =20 [44308.498686] EXT3-fs error (device dm-2): read_block_bitmap: Cannot read= =20 block bitmap - block_group =3D 966, block_bitmap =3D 31653888 = = =20 [44308.516538] EXT3-fs error (device dm-2): read_block_bitmap: Cannot read= =20 block bitmap - block_group =3D 966, block_bitmap =3D 31653888 = = =20 [44308.520738] EXT3-fs error (device dm-2): read_block_bitmap: Cannot read= =20 block bitmap - block_group =3D 966, block_bitmap =3D 31653888 = = =20 [44308.540687] EXT3-fs error (device dm-2): read_block_bitmap: Cannot read= =20 block bitmap - block_group =3D 966, block_bitmap =3D 31653888 = = =20 [44308.557256] EXT3-fs error (device dm-2): read_block_bitmap: Cannot read= =20 block bitmap - block_group =3D 966, block_bitmap =3D 31653888 = = =20 [44308.579235] EXT3-fs error (device dm-2): read_block_bitmap: Cannot read= =20 block bitmap - block_group =3D 966, block_bitmap =3D 31653888 = = =20 [44308.590239] EXT3-fs error (device dm-2): read_block_bitmap: Cannot read= =20 block bitmap - block_group =3D 966, block_bitmap =3D 31653888 = = =20 [44308.605335] EXT3-fs error (device dm-2): read_block_bitmap: Cannot read= =20 block bitmap - block_group =3D 966, block_bitmap =3D 31653888 = = =20 [44308.628031] EXT3-fs error (device dm-2): read_block_bitmap: Cannot read= =20 block bitmap - block_group =3D 966, block_bitmap =3D 31653888 = = =20 [44308.990689] EXT3-fs error (device dm-2): read_block_bitmap: Cannot read= =20 block bitmap - block_group =3D 966, block_bitmap =3D 31653888 = = =20 [44309.667656] Aborting journal on device dm-2. = =20 [44309.668659] __journal_remove_journal_head: freeing b_committed_data = =20 [44309.668659] __journal_remove_journal_head: freeing b_frozen_data = =20 [44309.668659] __journal_remove_journal_head: freeing b_frozen_data [44309.668659] __journal_remove_journal_head: freeing b_frozen_data [44309.668659] __journal_remove_journal_head: freeing b_frozen_data [44309.668659] __journal_remove_journal_head: freeing b_frozen_data [44309.668659] __journal_remove_journal_head: freeing b_frozen_data [44309.679137] ext3_abort called. [44309.679137] EXT3-fs error (device dm-2): ext3_journal_start_sb: Detected= =20 aborted journal [44309.679137] Remounting filesystem read-only [44338.161517] __ratelimit: 26116 messages suppressed [44338.161517] Buffer I/O error on device dm-2, logical block 8 [44338.161517] lost page write due to I/O error on dm-2 [44338.161517] Buffer I/O error on device dm-2, logical block 1027 [44338.161517] lost page write due to I/O error on dm-2 [44338.161517] Buffer I/O error on device dm-2, logical block 1539 [44338.161517] lost page write due to I/O error on dm-2 [44338.161531] Buffer I/O error on device dm-2, logical block 30998528 [44338.161538] lost page write due to I/O error on dm-2 [44338.162759] Buffer I/O error on device dm-2, logical block 30998529 [44338.162767] lost page write due to I/O error on dm-2 [44338.162776] Buffer I/O error on device dm-2, logical block 30998530 [44338.162781] lost page write due to I/O error on dm-2 This makes me feel that it might be a hardware issue. Ritesh =2D-=20 Ritesh Raj Sarraf RESEARCHUT - http://www.researchut.com "Necessity is the mother of invention." --nextPart615940068.Sy5SZTDCAf Content-Type: application/pgp-signature; name=signature.asc Content-Description: This is a digitally signed message part. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.9 (GNU/Linux) iEYEABECAAYFAkls0WsACgkQ4Rhi6gTxMLzbvgCfdf3OnEd1txSlb8MptzfxVTGc /roAn0zhrUl+hreCj0x2qCe8vWxpyI7I =We9l -----END PGP SIGNATURE----- --nextPart615940068.Sy5SZTDCAf-- --===============0334662826== Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Disposition: inline --===============0334662826==--