Messages in this thread | | | Date | Thu, 23 Aug 2007 22:47:18 +0530 | From | Kamalesh Babulal <> | Subject | Re: [BUG] 2.6.23-rc3-mm1 kernel BUG at mm/page_alloc.c:2876! |
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Mel Gorman wrote: > On (22/08/07 13:50), Andrew Morton didst pronounce: > >> On Wed, 22 Aug 2007 13:48:00 -0700 >> Andrew Morton <akpm@linux-foundation.org> wrote: >> >> >>> This: >>> >>> --- a/mm/page_alloc.c~a >>> +++ a/mm/page_alloc.c >>> @@ -2814,6 +2814,8 @@ static int __cpuinit process_zones(int c >>> return 0; >>> bad: >>> for_each_zone(dzone) { >>> + if (!populated_zone(zone)) >>> + continue; >>> if (dzone == zone) >>> break; >>> kfree(zone_pcp(dzone, cpu)); >>> _ >>> >>> might help avoid the crash >>> >> err, make that >> >> > > We're already in the error path at this point and it's going to blow up. > The real problem is kmalloc_node() returning NULL for whatever reason. > > >> --- a/mm/page_alloc.c~a >> +++ a/mm/page_alloc.c >> @@ -2814,6 +2814,8 @@ static int __cpuinit process_zones(int c >> return 0; >> bad: >> for_each_zone(dzone) { >> + if (!populated_zone(dzone)) >> + continue; >> if (dzone == zone) >> break; >> kfree(zone_pcp(dzone, cpu)); >> _ >> >> >> > > After applying the patch, the call trace is gone but the kernel bug is still hit
Memory: 4105840k/4194304k available (4964k kernel code, 88464k reserved, 948k data, 571k bss, 264k init) SLUB: Genslabs=12, HWalign=128, Order=0-1, MinObjects=4, CPUs=4, Nodes=16 ------------[ cut here ]------------ kernel BUG at mm/page_alloc.c:2878! cpu 0x0: Vector: 700 (Program Check) at [c0000000005cbbe0] pc: c0000000004b5160: .setup_per_cpu_pageset+0x24/0x48 lr: c0000000004b5160: .setup_per_cpu_pageset+0x24/0x48 sp: c0000000005cbe60 msr: 8000000000029032 current = 0xc0000000004fd1b0 paca = 0xc0000000004fdd80 pid = 0, comm = swapper kernel BUG at mm/page_alloc.c:2878! enter ? for help [c0000000005cbee0] c0000000004978d8 .start_kernel+0x304/0x3f4 [c0000000005cbf90] c0000000003bef1c .start_here_common+0x54/0x58
- Kamalesh Babulal
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