On Mon, Nov 18, 2002 at 05:10:38PM -0800, Andy Pfiffer wrote:
On Mon, 2002-11-18 at 00:53, Eric W. Biederman wrote:
kexec is a set of systems call that allows you to load another kernel from the currently executing Linux kernel. The current implementation has only been tested, and had the kinks worked out on x86, but the generic code should work on any architecture.
Great News, Eric. For the first time *ever* I got a kexec reboot to work on my most troublesome machine (see below).
Same here - preloading the new kernel and issuing kexec -e after init 1 works on the troublesome SMP system I'd earlier been sending you earlier. Bootimg used to work on this setup, so bypassing the bios calls had the expected effect.
If I issue the call earlier though, it runs into trouble with aic7xxx reporting interrupts during setup. Guess you know why we are looking at that case - eventually need to be able to transition directly at dump time without a chance to go through user-space shutdown ...
Regards Suparna
For those looking to replicate:
0. apply these two patches to 2.5.48 (bk Changeset 1.842) http://www.xmission.com/~ebiederm/files/kexec/linux-2.5.48.x86kexec.diff http://www.xmission.com/~ebiederm/files/kexec/linux-2.5.48.x86kexec-hwfixes.diff 2. compile this: http://www.xmission.com/~ebiederm/files/kexec/kexec-tools-1.7.tar.gz 3. my recipe for rebooting: a) I have a script that I execute by hand after "init 1" to unmount my filesystems and then remount / and /boot read-only. b) I have the kexec binary installed in /boot. c) ./kexec-1.7 --force --debug "--command-line=ro root=805 console=ttyS0,9600n8" ./linux-2.5Thanks, Eric!
Andy
# ./kexec-1.7 --force --debug "--command-line=ro root=805 console=ttyS0,9600n8" ./linux-2.5 FIXME assuming 64M of ram setup16_end: 00091b1f FIXME assuming 64M of ram Synchronizing SCSI caches: Shutting down devices Starting new kernel Linux version 2.5.48 (andyp@joe) (gcc version 2.95.3 20010315 (SuSE)) #1 Mon Nov 18 15:03:14 PST 2002 Video mode to be used for restore is ffff BIOS-provided physical RAM map: BIOS-e820: 0000000000001000 - 000000000009ffff (usable) BIOS-e820: 0000000000100000 - 0000000003ffffff (usable) 63MB LOWMEM available. hm, page 00000000 reserved twice. On node 0 totalpages: 16383 DMA zone: 4096 pages, LIFO batch:1 Normal zone: 12287 pages, LIFO batch:2 HighMem zone: 0 pages, LIFO batch:1 IBM machine detected. Enabling interrupts during APM calls. IBM machine detected. Disabling SMBus accesses. Building zonelist for node : 0 Kernel command line: ro root=805 console=ttyS0,9600n8 Initializing CPU#0 Detected 799.717 MHz processor. Console: colour VGA+ 80x25 Calibrating delay loop... 1581.05 BogoMIPS Memory: 60868k/65532k available (2087k kernel code, 4204k reserved, 825k data, 304k init, 0k highmem) Security Scaffold v1.0.0 initialized Dentry cache hash table entries: 8192 (order: 4, 65536 bytes) Inode-cache hash table entries: 4096 (order: 3, 32768 bytes) Mount-cache hash table entries: 512 (order: 0, 4096 bytes) -> /dev -> /dev/console -> /root CPU: L1 I cache: 16K, L1 D cache: 16K CPU: L2 cache: 256K Intel machine check architecture supported. Intel machine check reporting enabled on CPU#0. CPU: Intel Pentium III (Coppermine) stepping 0a Enabling fast FPU save and restore... done. Enabling unmasked SIMD FPU exception support... done. Checking 'hlt' instruction... OK. POSIX conformance testing by UNIFIX Linux NET4.0 for Linux 2.4 Based upon Swansea University Computer Society NET3.039 Initializing RT netlink socket mtrr: v2.0 (20020519) Linux Plug and Play Support v0.9 (c) Adam Belay PCI: PCI BIOS revision 2.10 entry at 0xfd5dc, last bus=1 PCI: Using configuration type 1 BIO: pool of 256 setup, 14Kb (56 bytes/bio) biovec pool[0]: 1 bvecs: 116 entries (12 bytes) biovec pool[1]: 4 bvecs: 116 entries (48 bytes) biovec pool[2]: 16 bvecs: 58 entries (192 bytes) biovec pool[3]: 64 bvecs: 29 entries (768 bytes) biovec pool[4]: 128 bvecs: 14 entries (1536 bytes) biovec pool[5]: 256 bvecs: 7 entries (3072 bytes) block request queues: 112 requests per read queue 112 requests per write queue 8 requests per batch enter congestion at 27 exit congestion at 29 isapnp: Scanning for PnP cards... isapnp: No Plug & Play device found drivers/usb/core/usb.c: registered new driver usbfs drivers/usb/core/usb.c: registered new driver hub PCI: Probing PCI hardware PCI: Probing PCI hardware (bus 00) PCI: Discovered peer bus 01 Starting kswapd aio_setup: sizeof(struct page) = 40 [c3fb2040] eventpoll: successfully initialized. Journalled Block Device driver loaded Installing knfsd (copyright (C) 1996 okir@monad.swb.de). udf: registering filesystem Capability LSM initialized Serial: 8250/16550 driver $Revision: 1.90 $ IRQ sharing disabled ttyS0 at I/O 0x3f8 (irq = 4) is a 16550A ttyS1 at I/O 0x2f8 (irq = 3) is a 16550A parport0: PC-style at 0x378 [PCSPP] pty: 256 Unix98 ptys configured lp0: using parport0 (polling). Linux agpgart interface v0.99 (c) Jeff Hartmann agpgart: Maximum main memory to use for agp memory: 27M agpgart: unable to determine aperture size. agpgart: Maximum main memory to use for agp memory: 27M agpgart: unable to determine aperture size. [drm] Initialized radeon 1.7.0 20020828 on minor 0 Floppy drive(s): fd0 is 1.44M FDC 0 is a National Semiconductor PC87306 Intel(R) PRO/100 Network Driver - version 2.1.24-k2 Copyright (c) 2002 Intel Corporation
e100: eth0: Intel(R) PRO/100+ Server Adapter (PILA8470B) Mem:0xfeb7f000 IRQ:11 Speed:0 Mbps Dx:N/A Hardware receive checksums enabled cpu cycle saver enabled
Uniform Multi-Platform E-IDE driver Revision: 7.00alpha2 ide: Assuming 33MHz system bus speed for PIO modes; override with idebus=xx hda: LG CD-ROM CRD-8484B, ATAPI CD/DVD-ROM drive ide0 at 0x1f0-0x1f7,0x3f6 on irq 14 hda: ATAPI 48X CD-ROM drive, 128kB Cache Uniform CD-ROM driver Revision: 3.12 end_request: I/O error, dev hda, sector 0 SCSI subsystem driver Revision: 1.00 PCI: Enabling device 01:03.0 (0156 -> 0157) scsi0 : Adaptec AIC7XXX EISA/VLB/PCI SCSI HBA DRIVER, Rev 6.2.4 <Adaptec aic7892 Ultra160 SCSI adapter> aic7892: Ultra160 Wide Channel A, SCSI Id=7, 32/253 SCBs
(scsi0:A:0): 160.000MB/s transfers (80.000MHz DT, offset 31, 16bit) Vendor: IBM-PSG Model: ST318436LC !# Rev: 3281 Type: Direct-Access ANSI SCSI revision: 03 (scsi0:A:1): 160.000MB/s transfers (80.000MHz DT, offset 31, 16bit) Vendor: IBM-PSG Model: ST318436LC !# Rev: 3281 Type: Direct-Access ANSI SCSI revision: 03 Vendor: IBM Model: YGLv3 S2 Rev: 0 Type: Processor ANSI SCSI revision: 02 scsi0:A:0:0: Tagged Queuing enabled. Depth 64 SCSI device sda: drive cache: write through SCSI device sda: 35548320 512-byte hdwr sectors (18201 MB) sda: sda1 sda2 < sda5 sda6 sda7 sda8 sda9 sda10 > Attached scsi disk sda at scsi0, channel 0, id 0, lun 0 scsi0:A:1:0: Tagged Queuing enabled. Depth 64 SCSI device sdb: drive cache: write through SCSI device sdb: 35548320 512-byte hdwr sectors (18201 MB) sdb: sdb1 Attached scsi disk sdb at scsi0, channel 0, id 1, lun 0 Attached scsi generic sg2 at scsi0, channel 0, id 8, lun 0, type 3 Initializing USB Mass Storage driver... drivers/usb/core/usb.c: registered new driver usb-storage USB Mass Storage support registered. mice: PS/2 mouse device common for all mice input: ImPS/2 Generic Wheel Mouse on isa0060/serio1 serio: i8042 AUX port at 0x60,0x64 irq 12 input: AT Set 2 keyboard on isa0060/serio0 serio: i8042 KBD port at 0x60,0x64 irq 1 Advanced Linux Sound Architecture Driver Version 0.9.0rc5 (Sun Nov 10 19:48:18 2002 UTC). request_module[snd-card-0]: not ready request_module[snd-card-1]: not ready request_module[snd-card-2]: not ready request_module[snd-card-3]: not ready request_module[snd-card-4]: not ready request_module[snd-card-5]: not ready request_module[snd-card-6]: not ready request_module[snd-card-7]: not ready ALSA device list: No soundcards found. NET4: Linux TCP/IP 1.0 for NET4.0 IP: routing cache hash table of 512 buckets, 4Kbytes TCP: Hash tables configured (established 4096 bind 4096) NET4: Unix domain sockets 1.0/SMP for Linux NET4.0. kjournald starting. Commit interval 5 seconds EXT3-fs: mounted filesystem with ordered data mode. VFS: Mounted root (ext3 filesystem) readonly. Freeing unused kernel memory: 304k freed INIT: version 2.82 booting Running /etc/init.d/boot Mounting /proc device done Mounting /dev/ptsblogd: console=/dev/console, stdin=/dev/console, must differ, boot logging disabled showconsole: Warning: the ioctl TIOCGDEV is not known by the kerAdding 530104k swap on /dev/sda6. Priority:42 extents:1 nel Activating swap-devices in /etc/fstab... done showconsole: Warning: the ioctl TIOCGDEV is not known by the kernel Checking file systems... fsck 1.26 (3-Feb-2002) /dev/sda5: clean, 16935/66264 files, 104836/265041 blocks /dev/sda1: clean, 55/10040 files, 24115/40131 blocks /dev/sdb1: clean, 11/2223872 files, 78008/4441964 blocks /dev/sda10: clean, 523256/1198208 files, 2052639/2393677 blocks /dev/sda9: clean, 51895/263296 files, 310582/526120 blocks /dev/sda8: clean, 140195/525888 files, 590977/1050241 blocks /dev/sda7: clean, EXT3 FS 2.4-0.9.16, 02 Dec 2001 on sd(8,5), 2747/131616 fileinternal journal s, 111363/263056 blocks done Setting up /lib/modules/2.5.48 failed Mounting local file systems... kjournald starting. Commit interval 5 seconds proc on /proc tyEXT3 FS 2.4-0.9.16, 02 Dec 2001 on sd(8,17), pe proc (rw) deinternal journal vpts on /dev/ptsEXT3-fs: mounted filesystem with ordered data mode. type devpts (rw,mode=0620,gid=5) /dev/sdb1 on /2nd type ext3 (kjournald starting. Commit interval 5 seconds rw) /dev/sda1 oEXT3 FS 2.4-0.9.16, 02 Dec 2001 on sd(8,10), n /boot type extinternal journal 2 (rw) EXT3-fs: mounted filesystem with ordered data mode. /dev/sda10 on /home type ext3 (rw) kjournald starting. Commit interval 5 seconds EXT3 FS 2.4-0.9.16, 02 Dec 2001 on sd(8,9), internal journal EXT3-fs: mounted filesystem with ordered data mode. /dev/sda9 on /opt type ext3 (rw) kjournald starting. Commit interval 5 seconds EXT3 FS 2.4-0.9.16, 02 Dec 2001 on sd(8,8), internal journal EXT3-fs: mounted filesystem with ordered data mode. /dev/sda8 on /usr type ext3 (rw) kjournald starting. Commit interval 5 seconds EXT3 FS 2.4-0.9.16, 02 Dec 2001 on sd(8,7), internal journal EXT3-fs: mounted filesystem with ordered data mode. /dev/sda7 on /var type ext3 (rw) done Restore device permissions done Activating remaining swap-devices in /etc/fstab... done Setting up the CMOS clock done Setting up timezone data done Configuring serial ports... ttyS0 at 0x03f8 (irq = 4) is a 16550A ttyS1 at 0x02f8 (irq = 3) is a 16550A Configured serial ports done Setting up hostname 'joe' done Setting up loopback interface done Creating /var/log/boot.msg done showconsole: Warning: the ioctl TIOCGDEV is not known by the kernel INIT: Entering runlevel: 5 blogd: console=/dev/console, stdin=/dev/console, must differ, boot logging disabled Master Resource Control: previous runlevel: N, switching to runlevel:5 Starting personal-firewall (initial) [not active] unused Initializing random number generator done Setting up network interfaces: lo done eth0 (DHCP) IP address: 172.20.1.38 done Starting syslog services done Starting hotplugging services [ net pci usb ] failed Starting hardware scan on boote100: eth0 NIC Link is Up 100 Mbps Full duplex done Starting RPC portmap daemon done Starting SSH daemon done Starting sound driver: already running done Starting service at daemon done Initializing SMTP port (sendmail) done Loading keymap qwerty/us.map.gz done Loading compose table winkeys shiftctrl latin1.add done Loading console font lat1-16.psfu done Loading screenmap none done Setting up console ttys done Starting service kdm done Starting CRON daemon done Starting Name Service Cache Daemon done Starting inetd done Starting personal-firewall (final) [not active] unused Master Resource Control: runlevel 5 has been reached Failed services in runlevel 5: hotplug Skipped services in runlevel 5: personal-firewall.initial splash personal-firewall.final