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authorDave Young <hidave.darkstar@gmail.com>2008-08-20 16:43:03 -0700
committerIngo Molnar <mingo@elte.hu>2008-08-21 10:13:21 +0200
commite621bd18958ef5dbace3129ebe17a0a475e127d9 (patch)
tree214b768e7791b60db3e06676d76e01e77e54c791 /arch/x86/kernel/vmi_32.c
parent6a55617ed5d1aa62b850de2cf66f5ede2eef4825 (diff)
downloadlinux-linaro-android-e621bd18958ef5dbace3129ebe17a0a475e127d9.tar.gz
i386: vmalloc size fix
Booting kernel with vmalloc=[any size<=16m] will oops on my pc (i386/1G memory). BUG_ON in arch/x86/mm/init_32.c triggered: BUG_ON((unsigned long)high_memory > VMALLOC_START); It's due to the vm area hole. In include/asm-x86/pgtable_32.h: #define VMALLOC_OFFSET (8 * 1024 * 1024) #define VMALLOC_START (((unsigned long)high_memory + 2 * VMALLOC_OFFSET - 1) \ & ~(VMALLOC_OFFSET - 1)) There's several related point: 1. MAXMEM : (-__PAGE_OFFSET - __VMALLOC_RESERVE). The space after VMALLOC_END is included as well, I set it to (VMALLOC_END - PAGE_OFFSET - __VMALLOC_RESERVE) 2. VMALLOC_OFFSET is not considered in __VMALLOC_RESERVE fixed by adding VMALLOC_OFFSET to it. 3. VMALLOC_START : (((unsigned long)high_memory + 2 * VMALLOC_OFFSET - 1) & ~(VMALLOC_OFFSET - 1)) So it's not always 8M, bigger than 8M possible. I set it to ((unsigned long)high_memory + VMALLOC_OFFSET) 4. the VMALLOC_RESERVE is an unused macro, so remove it here. Signed-off-by: Dave Young <hidave.darkstar@gmail.com> Cc: akpm@linux-foundation.org Cc: hidave.darkstar@gmail.com Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'arch/x86/kernel/vmi_32.c')
0 files changed, 0 insertions, 0 deletions