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| author | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2012-05-17 09:14:21 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2012-05-17 09:14:21 -0700 |
| commit | 32535bd5637d3152f944f124bcc82d498892ba1b (patch) | |
| tree | 99d33b58cfec44f4cf95fad5efa75aea0dd7d60b /arch/x86/kernel/setup_percpu.c | |
| parent | 0b623f871d7c993fac8ad7aaaa8f5f3cdb8ed480 (diff) | |
| parent | 3a36dd068f4308461661d28e8e14e11e426eba6b (diff) | |
Merge branch 'v3.5-for-usb' of git://git.kernel.org/pub/scm/linux/kernel/git/kgene/linux-samsung into usb-next
Diffstat (limited to 'arch/x86/kernel/setup_percpu.c')
| -rw-r--r-- | arch/x86/kernel/setup_percpu.c | 14 |
1 files changed, 13 insertions, 1 deletions
diff --git a/arch/x86/kernel/setup_percpu.c b/arch/x86/kernel/setup_percpu.c index 71f4727da37..5a98aa27218 100644 --- a/arch/x86/kernel/setup_percpu.c +++ b/arch/x86/kernel/setup_percpu.c @@ -185,10 +185,22 @@ void __init setup_per_cpu_areas(void) #endif rc = -EINVAL; if (pcpu_chosen_fc != PCPU_FC_PAGE) { - const size_t atom_size = cpu_has_pse ? PMD_SIZE : PAGE_SIZE; const size_t dyn_size = PERCPU_MODULE_RESERVE + PERCPU_DYNAMIC_RESERVE - PERCPU_FIRST_CHUNK_RESERVE; + size_t atom_size; + /* + * On 64bit, use PMD_SIZE for atom_size so that embedded + * percpu areas are aligned to PMD. This, in the future, + * can also allow using PMD mappings in vmalloc area. Use + * PAGE_SIZE on 32bit as vmalloc space is highly contended + * and large vmalloc area allocs can easily fail. + */ +#ifdef CONFIG_X86_64 + atom_size = PMD_SIZE; +#else + atom_size = PAGE_SIZE; +#endif rc = pcpu_embed_first_chunk(PERCPU_FIRST_CHUNK_RESERVE, dyn_size, atom_size, pcpu_cpu_distance, |