Dariush Debian Diary

model name : Intel(R) Core(TM)2 Quad CPU Q6600 @ 2.40GHz ( @ 1600Mhz )

                  sign    verify    sign/s verify/s
rsa  512 bits 0.000471s 0.000035s   2124.9  28527.1
rsa 1024 bits 0.002158s 0.000094s    463.3  10623.4
rsa 2048 bits 0.011599s 0.000289s     86.2   3464.4
rsa 4096 bits 0.070851s 0.000953s     14.1   1049.2
                  sign    verify    sign/s verify/s
dsa  512 bits 0.000359s 0.000422s   2785.9   2372.5
dsa 1024 bits 0.000946s 0.001123s   1057.3    890.2
dsa 2048 bits 0.002879s 0.003503s    347.3    285.5

vs AMD Phenom(tm) 9950 Quad-Core Processor

                  sign    verify    sign/s verify/s
rsa  512 bits 0.000568s 0.000035s   1759.7  28305.3
rsa 1024 bits 0.001966s 0.000086s    508.6  11630.0
rsa 2048 bits 0.009823s 0.000250s    101.8   4004.4
rsa 4096 bits 0.058824s 0.000834s     17.0   1199.0
                  sign    verify    sign/s verify/s
dsa  512 bits 0.000369s 0.000401s   2707.1   2496.5
dsa 1024 bits 0.000841s 0.000979s   1189.4   1021.8
dsa 2048 bits 0.002415s 0.002877s    414.0    347.6

------------[ cut here ]------------ kernel BUG at fs/btrfs/extent-tree.c:4158! invalid opcode: 0000 [#1] SMP last sysfs file: /sys/module/zlib_deflate/initstate CPU 1 Modules linked in: btrfs crc32c libcrc32c nls_iso8859_1 nls_cp437 vfat fat usb_storage ub i915 drm i2c_algo_bit i2c_core binfmt_misc ppdev lp parport bridge stp bnep sco rfcomm l2cap vboxnetadp vboxnetflt vboxdrv kvm_intel kvm tun acpi_cpufreq cpufreq_ondemand cpufreq_powersave cpufreq_userspace cpufreq_stats freq_table microcode deflate zlib_deflate ctr twofish twofish_common camellia serpent blowfish cast5 des_generic cbc cryptd aes_x86_64 aes_generic xcbc rmd160 sha256_generic sha1_generic md5 hmac crypto_null af_key ext3 jbd mbcache fuse dm_crypt dm_snapshot dm_mirror dm_region_hash dm_log pata_pcmcia ide_cs snd_hda_codec_analog snd_hda_intel snd_hda_codec snd_pcm_oss snd_mixer_oss pcmcia snd_pcm arc4 snd_seq_dummy ecb snd_seq_oss snd_seq_midi snd_rawmidi iwlagn joydev yenta_socket snd_seq_midi_event iwlcore btusb snd_seq rsrc_nonstatic snd_timer bluetooth snd_seq_device pcmcia_core rfkill hp_accel mac80211 wmi rtc_cmos lis3lv02d rtc_core snd cfg80211 rtc_lib pcspkr soundcore battery processor snd_page_alloc psmouse irda serio_raw ac button container crc_ccitt evdev xfs exportfs dm_mod sd_mod crc_t10dif ide_cd_mod cdrom ata_generic pata_acpi ata_piix uhci_hcd ide_pci_generic sdhci_pci sdhci ahci mmc_core led_class ricoh_mmc e1000e ehci_hcd usbcore piix ide_core intel_agp libata scsi_mod video output thermal fan thermal_sys [last unloaded: scsi_wait_scan] Pid: 22723, comm: du Tainted: G W 2.6.30.5 #1 HP Compaq 6910p (RH241AV) RIP: 0010:[] [] run_one_delayed_ref+0x18f/0x482 [btrfs] RSP: 0018:ffff880037705be8 EFLAGS: 00010286 RAX: 00000000ffffffe4 RBX: ffff880055a20000 RCX: ffff88001f74c870 RDX: 0000000000000000 RSI: ffff88001f74c870 RDI: 00000000865361f4 RBP: ffff880037705c88 R08: 0000000000000006 R09: ffffffff805a86a7 R10: 000000000000000f R11: 0000000000003e20 R12: 0000000000000001 R13: ffff88001f74c870 R14: ffff88007de37b40 R15: ffff88007de37b40 FS: 00007f0dc7bbc6f0(0000) GS:ffff88000102c000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fb65df26000 CR3: 000000007dfe6000 CR4: 00000000000026e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 Process du (pid: 22723, threadinfo ffff880037704000, task ffff88006fb00000) Stack: 0000000000000000 00000000865361f4 ffff880037705c18 ffffffff802eb921 ffff8800049c7800 ffff88002196d000 0000000000000005 0000000000000000 0000000000000000 00000000a09a9a54 0000000024e47000 00000000001000a8 Call Trace: [] ? virt_to_head_page+0x1c/0x51 [] run_clustered_refs+0x25c/0x2af [btrfs] [] ? btrfs_find_ref_cluster+0x107/0x162 [btrfs] [] btrfs_run_delayed_refs+0xdc/0x199 [btrfs] [] __btrfs_end_transaction+0x6c/0x128 [btrfs] [] btrfs_end_transaction+0x1e/0x34 [btrfs] [] btrfs_dirty_inode+0x58/0x77 [btrfs] [] __mark_inode_dirty+0x42/0x1bd [] ? filldir+0x0/0xe3 [] touch_atime+0x11b/0x13a [] vfs_readdir+0xa1/0xd5 [] ? fd_install+0x43/0x89 [] sys_getdents+0x8c/0xec [] system_call_fastpath+0x16/0x1b Code: 00 08 48 8d 4d b0 48 8b 73 20 41 b9 01 00 00 00 c7 45 c4 33 00 00 00 4c 8d 45 c4 48 89 c2 48 8b 7d 88 e8 1e 95 ff ff 85 c0 74 04 <0f> 0b eb fe 4d 8b 65 00 49 63 75 40 4c 89 e7 48 6b f6 19 48 83 RIP [] run_one_delayed_ref+0x18f/0x482 [btrfs] RSP ---[ end trace 830eb32434834c21 ]---

supposedly BIOS 1.08 fixes RAM problem, but in 1.09 the problem exists, that even though there is >4G ram in machine, OS can see only 3.2G. (lshw reports correctly installed memory though). Problem can be solved by downgrading to 1.08 or upgrading to 1.14. (1.10 supossedly is not enough)

"Negative cache rejected lookup for" on MacOSX (Snow Leopard), fixed by restart

go to http://software.canon-europe.com/products/0010649.asp download debian .tar, unpack and:

dpkg -i --force-architecture cnijfilter-common_3.00-1_i386.deb        cnijfilter-ip4600series_3.00-1_i386.deb