diff options
| author | Tejun Heo <tj@kernel.org> | 2016-09-06 18:35:56 +0200 |
|---|---|---|
| committer | Tejun Heo <tj@kernel.org> | 2016-09-06 18:35:56 +0200 |
| commit | 2536524a91fe5c5a9fddd282fd4e79ee0976aefe (patch) | |
| tree | 30eb5b4cd6d9ed4fda69526537d4fac454cbc5e6 /arch/x86/mm/init.c | |
| parent | libata: SCT Write Same handle ATA_DFLAG_PIO (diff) | |
| parent | Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert... (diff) | |
| download | linux-2536524a91fe5c5a9fddd282fd4e79ee0976aefe.tar.xz linux-2536524a91fe5c5a9fddd282fd4e79ee0976aefe.zip | |
Merge branch 'master' into for-4.9
Diffstat (limited to 'arch/x86/mm/init.c')
| -rw-r--r-- | arch/x86/mm/init.c | 14 |
1 files changed, 12 insertions, 2 deletions
diff --git a/arch/x86/mm/init.c b/arch/x86/mm/init.c index 620928903be3..d28a2d741f9e 100644 --- a/arch/x86/mm/init.c +++ b/arch/x86/mm/init.c @@ -122,8 +122,18 @@ __ref void *alloc_low_pages(unsigned int num) return __va(pfn << PAGE_SHIFT); } -/* need 3 4k for initial PMD_SIZE, 3 4k for 0-ISA_END_ADDRESS */ -#define INIT_PGT_BUF_SIZE (6 * PAGE_SIZE) +/* + * By default need 3 4k for initial PMD_SIZE, 3 4k for 0-ISA_END_ADDRESS. + * With KASLR memory randomization, depending on the machine e820 memory + * and the PUD alignment. We may need twice more pages when KASLR memory + * randomization is enabled. + */ +#ifndef CONFIG_RANDOMIZE_MEMORY +#define INIT_PGD_PAGE_COUNT 6 +#else +#define INIT_PGD_PAGE_COUNT 12 +#endif +#define INIT_PGT_BUF_SIZE (INIT_PGD_PAGE_COUNT * PAGE_SIZE) RESERVE_BRK(early_pgt_alloc, INIT_PGT_BUF_SIZE); void __init early_alloc_pgt_buf(void) { |