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authorStanislaw Gruszka <sgruszka@redhat.com>2011-12-06 08:08:34 (GMT)
committerIngo Molnar <mingo@elte.hu>2011-12-06 08:23:53 (GMT)
commit855c743a27bb58a9a521bdc485ef5acfdb69badc (patch)
tree0b53ae9a389f64a6f4c10492786d45d0453c6c25 /Documentation/usb
parent706d9a9c8b5758390036b9980a2b12d809599777 (diff)
downloadlinux-855c743a27bb58a9a521bdc485ef5acfdb69badc.tar.xz
x86/mm: Initialize high mem before free_all_bootmem()
Patch fixes a boot crash with pagealloc debugging enabled: Initializing HighMem for node 0 (000377fe:0003fff0) BUG: unable to handle kernel paging request at f6fefe80 IP: [<c1621ab5>] find_range_array+0x5e/0x69 [...] Call Trace: [<c1622064>] __get_free_all_memory_range+0x39/0xb4 [<c1620dd0>] add_highpages_with_active_regions+0x18/0x9b [<c1621a2e>] set_highmem_pages_init+0x70/0x90 [<c162122b>] mem_init+0x50/0x21b [<c16155bd>] start_kernel+0x1bf/0x31c [<c1615065>] i386_start_kernel+0x65/0x67 The crash happens when memblock wants to allocate big area for temporary "struct range" array and reuses pages from top of low memory, which were already passed to the buddy allocator. Reported-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com> Cc: linux-mm@kvack.org Cc: Mel Gorman <mgorman@suse.de> Link: http://lkml.kernel.org/r/20111206080833.GB3105@redhat.com Signed-off-by: Ingo Molnar <mingo@elte.hu>
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