On Monday November 29, cyril@xxxxxxxxxxxx wrote: > Hi, > > I'm having this error several times a month on a heavy loaded production NFS server with RAID0: > > Unable to handle kernel NULL pointer dereference at virtual address 00000020 > printing eip: > f884488e > *pde = 00000000 > Oops: 0002 > CPU: 0 > EIP: 0010:[raid0:__insmod_raid0_O/lib/modules/2.4.27-1-686/kernel/drivers/md+-235378/96] Not tainted > EFLAGS: 00010202 > eax: f884d6a0 ebx: efd32600 ecx: 00000000 edx: 00000020 > esi: efd32600 edi: c2825f5c ebp: 00001ee2 esp: c2825f1c > ds: 0018 es: 0018 ss: 0018 > Process kswapd (pid: 4, stackpage=c2825000) > Stack: efd32600 efd32600 c0153734 efd32600 efd32608 c015379d efd32600 f421cc28 > c0150018 c3581408 c35817c0 c35817c8 00000000 c0153a24 c2825f5c 00015d9c > efd32428 f50ebdc8 000001d0 0000003c 00000015 c025d478 c0153bb4 00015d9c > Call Trace: [clear_inode+196/224] [dispose_list+77/176] [__get_lease+488/608] [prune_icache+100/464] [shrink_icache_memory+36/64] > [try_to_free_pages_zone+143/256] [kswapd_balance_pgdat+102/176] [kswapd_balance+40/64] [kswapd+152/185] [_stext+0/64] [arch_kernel_thread+46/64] > [kswapd+0/185] > > Code: ff 0a 0f 94 c0 84 c0 75 44 ba ff ff ff ff 89 93 8c 01 00 00 > <5>__alloc_pages: 0-order allocation failed (gfp=0xf0/0) > > I'm running 2.4.27 compiled with Debian Sid options from the > kernel-image-2.4.27-1-686 package. > > Is this a bug in raid0.c ? No. The reference to raid0 is purely accidental - the offset into raid0 that is mentioned is -235378 : a negative number !!!! > > Is there a way to fix this? I suspect that it is a filesystem problem. I recommend reporting the problem to linux-kernel@xxxxxxxxxxxxxxx and mentioning what filesystem you are using. NeilBrown > > Thanks. > -- > Cyril Bouthors - To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
