Scott Wood schrieb: > On Thu, Jan 31, 2008 at 10:15:27AM -0600, Nathan Lynch wrote: >> Rune Torgersen wrote: >>> I get the following kernel core while a user program I have is dumping >>> core. >>> Any DIeas at what to look for? (this is runnign 2.6.24, arch/powerpc on >>> a 8280) >>> When runnign the program on 2.6.18 arch/ppc, the program gets a sig 11 >>> and dumps core. >>> On 2.6.24, I ghet the kernel oops, and then the program hangs sround >>> forever and is unkillable. >> Hmm, this is the second report of 2.6.24 crashing in >> __flush_dcache_icache during a core dump; see: >> http://ozlabs.org/pipermail/linuxppc-dev/2007-December/048662.html >> >> Is this easily recreatable? > > Yes, this program does it reliably: > > #include <pthread.h> > #include <stdio.h> > #include <unistd.h> > #include <signal.h> > > void *threadfn(void *arg) > { > fprintf(stderr, "threadfn\n"); > fflush(stderr); > sleep(1); > *(char *)0=0; > return NULL; > } > > int main(void) > { > pthread_t thread[4]; > int i; > > for (i = 0; i < 4; i++) > pthread_create(&thread[0], NULL, threadfn, NULL); > > for (;;); > }
Ack! This is a MPC8540ADS arch/powerpc compatible environment here: Feb 2 12:59:17 fox_1 kernel: Unable to handle kernel paging request for data at address 0x4802f000 Feb 2 12:59:17 fox_1 kernel: Faulting instruction address: 0xc000d5b8 Feb 2 12:59:17 fox_1 kernel: Oops: Kernel access of bad area, sig: 11 [#1] Feb 2 12:59:17 fox_1 kernel: MPC85xx ADS Feb 2 12:59:17 fox_1 kernel: Modules linked in: Feb 2 12:59:17 fox_1 kernel: NIP: c000d5b8 LR: c0010fb8 CTR: 00000080 Feb 2 12:59:17 fox_1 kernel: REGS: c24abb20 TRAP: 0300 Not tainted (2.6.24) Feb 2 12:59:17 fox_1 kernel: MSR: 00029000 <EE,ME> CR: 22882222 XER: 00000000 Feb 2 12:59:17 fox_1 kernel: DEAR: 4802f000, ESR: 00000000 Feb 2 12:59:17 fox_1 kernel: TASK = cf894d20[942] 'oops' THREAD: c24aa000 Feb 2 12:59:17 fox_1 kernel: GPR00: c22c7680 c24abbd0 cf894d20 4802f000 00000080 000f8b60 4802f000 ffffffff Feb 2 12:59:17 fox_1 kernel: GPR08: 00000000 c22c7680 000008d1 00000000 22882222 10018a64 00000006 c035a300 Feb 2 12:59:17 fox_1 kernel: GPR16: 00024000 c0380000 c24aa000 c24abc9c c24abc98 c2570480 c22c7680 c0380000 Feb 2 12:59:17 fox_1 kernel: GPR24: c0390420 cf09d000 c0497b60 c5b63948 4802f000 c24aa000 000000bc c0497b60 Feb 2 12:59:17 fox_1 kernel: NIP [c000d5b8] __flush_dcache_icache+0x14/0x40 Feb 2 12:59:17 fox_1 kernel: LR [c0010fb8] update_mmu_cache+0x94/0x98 Feb 2 12:59:17 fox_1 kernel: Call Trace: Feb 2 12:59:17 fox_1 kernel: [c24abbd0] [c24aa000] 0xc24aa000 (unreliable) Feb 2 12:59:17 fox_1 kernel: [c24abbe0] [c005d978] handle_mm_fault+0x374/0x6a4 Feb 2 12:59:17 fox_1 kernel: [c24abc30] [c005ddd0] get_user_pages+0x128/0x384 Feb 2 12:59:17 fox_1 kernel: [c24abc90] [c00a80d8] elf_core_dump+0xab8/0xb74 Feb 2 12:59:17 fox_1 kernel: [c24abd30] [c007718c] do_coredump+0x730/0x758 Feb 2 12:59:17 fox_1 kernel: [c24abe30] [c002eeb0] get_signal_to_deliver+0x244/0x3c4 Feb 2 12:59:17 fox_1 kernel: [c24abe80] [c000782c] do_signal+0x48/0x264 Feb 2 12:59:17 fox_1 kernel: [c24abf40] [c000e4ac] do_user_signal+0x74/0xc4 Feb 2 12:59:17 fox_1 kernel: Instruction dump: Feb 2 12:59:17 fox_1 kernel: 4d820020 7c8903a6 7c001bac 38630020 4200fff8 7c0004ac 4e800020 60000000 Feb 2 12:59:17 fox_1 kernel: 54630026 38800080 7c8903a6 7c661b78 <7c00186c> 38630020 4200fff8 7c0004ac Feb 2 12:59:17 fox_1 kernel: ---[ end trace a1d91e665173315a ]--- Feb 2 12:59:17 fox_1 kernel: note: oops[942] exited with preempt_count 1 It does not oops when the core dump is disabled. Regards, Clemens _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@ozlabs.org https://ozlabs.org/mailman/listinfo/linuxppc-dev
