From: Lars Kellogg-S. <la...@od...> - 2004-10-10 00:42:07
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I'm occasionally seeing the following during the UML boot process: Kernel panic: read of switch_pipe failed, errno = 9 At which point UML hangs after printing out a call trace. I'm starting UML like this: linux umid=uml1 ubd0=/tmp/root_fs \ con0=fd:0,fd:1 con=port:9001 eth0=mcast Has anyone seen this behavior? It's not happening frequently -- for example, I've restarted UML several times while typing this message in an attempt to capture the call trace without triggering the panic. -- Lars |
From: Jeff D. <jd...@ad...> - 2004-10-12 22:25:46
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la...@od... said: > I'm occasionally seeing the following during the UML boot process: > Kernel panic: read of switch_pipe failed, errno = 9 What's the full output? This has happened once or twice before, and the cause was something closing the wrong file descriptor. Jeff |
From: Lars Kellogg-S. <la...@od...> - 2004-10-13 00:08:15
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In article <200...@cc...>, Jeff Dike <jd...@ad...> wrote: > What's the full output? > > This has happened once or twice before, and the cause was something closing > the wrong file descriptor. Here's the complete kernel log: Checking for the skas3 patch in the host...not found Checking for /proc/mm...not found tracing thread pid = 10637 Linux version 2.6.8.1-1um (lars@flowers) (gcc version 3.3.4 (Debian 1:3.3.4-13)) #1 Mon Oct 11 11:34:18 EDT 2004 Built 1 zonelists Kernel command line: uml_dir=/var/uml/machines/lars000/control ubd0=root_fs.cow mem=64m con0=fd:0,fd:1 con=null umlctl=ssl4 ssl4=pts root=98:0 PID hash table entries: 16 (order 4: 128 bytes) Dentry cache hash table entries: 16384 (order: 4, 65536 bytes) Inode-cache hash table entries: 8192 (order: 3, 32768 bytes) Memory: 60848k available Calibrating delay loop... 313.75 BogoMIPS Mount-cache hash table entries: 512 (order: 0, 4096 bytes) Checking for host processor cmov support...Yes Checking for host processor xmm support...No Checking that ptrace can change system call numbers...OK Checking that host ptys support output SIGIO...Yes Checking that host ptys support SIGIO on close...No, enabling workaround Checking for /dev/anon on the host...Not available (open failed with errno 2) NET: Registered protocol family 16 mconsole (version 2) initialized on /var/uml/machines/lars000/control/lars000/mconsole SGI XFS with ACLs, no debug enabled Initializing Cryptographic API RAMDISK driver initialized: 16 RAM disks of 8192K size 1024 blocksize NET: Registered protocol family 2 IP: routing cache hash table of 512 buckets, 4Kbytes TCP: Hash tables configured (established 4096 bind 8192) NET: Registered protocol family 1 NET: Registered protocol family 17 Initializing software serial port version 1 Kernel panic: read of switch_pipe failed, errno = 9 <6>SysRq : Show Regs EIP: 0023:[<a01c0682>] CPU: 0 Not tainted ESP: 002b:a3f386a4 EFLAGS: 00200282 Not tainted EAX: 00000000 EBX: 00000001 ECX: a3f38744 EDX: a3f386c4 ESI: 00000008 EDI: 0000000a EBP: a3f386ac DS: 002b ES: 002b Call Trace: [<a00378fb>] [<a001c44b>] [<a0044e8d>] [<a0036c4b>] [<a01d74f0>] [<a001d518>] [<a0204527>] [<a00394ab>] [<a00116a2>] [<a004805d>] [<a01c03d0>] [<a0047fd0>] [<a0016699>] [<a01c0754>] [<a0047fd0>] [<a001667e>] [<a0047fd0>] [<a001d750>] [<a0047fd0>] [<a01c0628>] [<a01c0682>] sleeping process 10866 got unexpected signal : 11 -- Lars |