Messages in this thread | | | Date | Tue, 24 Feb 2009 20:41:46 +0100 | From | Ingo Molnar <> | Subject | Re: [PATCH] x86: check range in reserve_early() |
| |
* Yinghai Lu <yinghai@kernel.org> wrote:
> Impact: cleanup > > one 32bit system report: > > BIOS-provided physical RAM map: > BIOS-e820: 0000000000000000 - 000000000009fc00 (usable) > BIOS-e820: 000000000009fc00 - 00000000000a0000 (reserved) > BIOS-e820: 00000000000f0000 - 0000000000100000 (reserved) > BIOS-e820: 0000000000100000 - 000000001c000000 (usable) > BIOS-e820: 00000000ffff0000 - 0000000100000000 (reserved) > DMI 2.0 present. > last_pfn = 0x1c000 max_arch_pfn = 0x100000 > kernel direct mapping tables up to 1c000000 @ 7000-c000 > ... > RAMDISK: 1bc69000 - 1bfef4fa > ... > 0MB HIGHMEM available. > 448MB LOWMEM available. > mapped low ram: 0 - 1c000000 > low ram: 00000000 - 1c000000 > bootmap 00002000 - 00005800 > (9 early reservations) ==> bootmem [0000000000 - 001c000000] > #0 [0000000000 - 0000001000] BIOS data page ==> [0000000000 - 0000001000] > #1 [0000001000 - 0000002000] EX TRAMPOLINE ==> [0000001000 - 0000002000] > #2 [0000006000 - 0000007000] TRAMPOLINE ==> [0000006000 - 0000007000] > #3 [0000400000 - 00009ed14c] TEXT DATA BSS ==> [0000400000 - 00009ed14c] > #4 [001bc69000 - 001bfef4fa] RAMDISK ==> [001bc69000 - 001bfef4fa] > #5 [00009ee000 - 00009f2000] INIT_PG_TABLE ==> [00009ee000 - 00009f2000] > #6 [000009f400 - 0000100000] BIOS reserved ==> [000009f400 - 0000100000] > #7 [0000007000 - 0000007000] PGTABLE > #8 [0000002000 - 0000006000] BOOTMAP ==> [0000002000 - 0000006000] > > got strange blank entry with PGTABLE > > the reason is init_pg_table is big enough, and zero range is called with > init_memory_mapping/reserve_early() > > so try to check the range in reserve_early() > > Signed-off-by: Yinghai Lu <yinghai@kernel.org> > > --- > arch/x86/kernel/e820.c | 3 +++ > 1 file changed, 3 insertions(+)
Applied to tip/x86/mm, thanks Yinghai!
Ingo
| |