Messages in this thread | | | Date | Tue, 28 Feb 2006 21:25:01 -0800 | From | Paul Jackson <> | Subject | Re: + proc-dont-lock-task_structs-indefinitely-cpuset-fix-2.patch added to -mm tree |
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Eric wrote: > I can kill a kernel this way as well. Thanks this looks like > a good reproducer I will see if I can figure out why.
I suspect two problems, one with your patches that the fuser provokes, and a separate bug earlier in *-mm that the DEBUG options noted below provoke.
Details:
In addition to the problem that shows up with the three patches > proc-dont-lock-task_structs-indefinitely.patch > proc-dont-lock-task_structs-indefinitely-git-nfs-fix.patch > proc-dont-lock-task_structs-indefinitely-cpuset-fix.patch
when running the fuser command: > /bin/fuser -n tcp 5553
I am seeing as a separate bug the crash during boot that I reported last, when I turned on some DEBUG options. That crash occurs even with none of your proc patches.
That is, to be specific, with this patch at the top of my applied stack: rtc-subsystem-rs5c372-driver.patch
and these patches at the front of my unapplied queue: trivial-cleanup-to-proc_check_chroot.patch proc-fix-the-inode-number-on-proc-pid-fd.patch
and the debug options: > CONFIG_DEBUG_SLAB=y > CONFIG_DEBUG_SPINLOCK=y > CONFIG_DEBUG_SPINLOCK_SLEEP=y
I die during system boot with: ==============================
... pci_hotplug: PCI Hot Plug PCI Core version: 0.5 SGI Altix RTC Timer: v2.1, 20 MHz EFI Time Services Driver v0.4 Linux agpgart interface v0.101 (c) Dave Jones sn_console: Console driver init ttySG0 at I/O 0x0 (irq = 0) is a SGI SN L1 Unable to handle kernel NULL pointer dereference (address 0000000000000058) swapper[1]: Oops 8813272891392 [1] Modules linked in:
Pid: 1, CPU 0, comm: swapper psr : 0000101008026018 ifs : 800000000000040b ip : [<a0000001001f0a50>] Not tainted ip is at sysfs_create_group+0x30/0x2a0 unat: 0000000000000000 pfs : 0000000000000308 rsc : 0000000000000003 rnat: 0000000002000027 bsps: 0000000000000002 pr : 0000000000005649 ldrs: 0000000000000000 ccv : 0000000000000000 fpsr: 0009804c8a70433f csd : 0000000000000000 ssd : 0000000000000000 b0 : a00000010081ad30 b6 : e000023002310080 b7 : a00000010081ad80 f6 : 1003e0000000000000000 f7 : 1003e20c49ba5e353f7cf f8 : 1003e0000000000002ff0 f9 : 1003e0000000000000068 f10 : 1003e0000000000000000 f11 : 1003e0000000000000000 r1 : a000000100c93ab0 r2 : 0000000000000058 r3 : a000000100aa3560 r8 : 0000000000000000 r9 : a000000100cba7a0 r10 : ffffffffffffffff r11 : 0000000000000400 r12 : e00002343bdb7d50 r13 : e00002343bdb0000 r14 : a000000100aa8300 r15 : a000000100cba7a0 r16 : a000000100aa3568 r17 : 00000000000003c0 r18 : 0000000000000001 r19 : 0000000000000002 r20 : ffffffffffffffff r21 : 000000000000000e r22 : 0000000000000000 r23 : a000000100a94eb8 r24 : a000000100824c80 r25 : a000000100aa3b18 r26 : 0000000000004000 r27 : a000000100913e80 r28 : e00002343b2d3918 r29 : 0000000000000001 r30 : a0000001007d9228 r31 : a00000010081ad80
Call Trace: [<a000000100013280>] show_stack+0x40/0xa0 sp=e00002343bdb78e0 bsp=e00002343bdb1298 [<a000000100013ab0>] show_regs+0x7d0/0x800 sp=e00002343bdb7ab0 bsp=e00002343bdb1248 [<a000000100036970>] die+0x210/0x320 sp=e00002343bdb7ab0 bsp=e00002343bdb1200 [<a00000010005a800>] ia64_do_page_fault+0x900/0xa80 sp=e00002343bdb7ad0 bsp=e00002343bdb1198 [<a00000010000bbc0>] ia64_leave_kernel+0x0/0x290 sp=e00002343bdb7b80 bsp=e00002343bdb1198 [<a0000001001f0a50>] sysfs_create_group+0x30/0x2a0 sp=e00002343bdb7d50 bsp=e00002343bdb1140 [<a00000010081ad30>] topology_cpu_callback+0x70/0xc0 sp=e00002343bdb7d60 bsp=e00002343bdb1110 [<a00000010081ae00>] topology_sysfs_init+0x80/0x120 sp=e00002343bdb7d60 bsp=e00002343bdb10f0 [<a000000100009860>] init+0x580/0x8e0 sp=e00002343bdb7d60 bsp=e00002343bdb10c8 [<a000000100011740>] kernel_thread_helper+0xe0/0x100 sp=e00002343bdb7e30 bsp=e00002343bdb10a0 [<a000000100009140>] start_kernel_thread+0x20/0x40 sp=e00002343bdb7e30 bsp=e00002343bdb10a0 <0>Kernel panic - not syncing: Attempted to kill init!
-- I won't rest till it's the best ... Programmer, Linux Scalability Paul Jackson <pj@sgi.com> 1.925.600.0401 - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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