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author | Tejun Heo <tj@kernel.org> | 2009-08-14 06:00:50 (GMT) |
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committer | Tejun Heo <tj@kernel.org> | 2009-08-14 06:00:50 (GMT) |
commit | f58dc01ba2ca9fe3ab2ba4ca43d9c8a735cf62d8 (patch) | |
tree | 9eb76a0d6aa34e56f8650fe98a5ce26891a522ab /arch/x86/kernel/setup_percpu.c | |
parent | 08fc45806103e59a37418e84719b878f9bb32540 (diff) | |
download | linux-f58dc01ba2ca9fe3ab2ba4ca43d9c8a735cf62d8.tar.xz |
percpu: generalize first chunk allocator selection
Now that all first chunk allocators are in mm/percpu.c, it makes sense
to make generalize percpu_alloc kernel parameter. Define PCPU_FC_*
and set pcpu_chosen_fc using early_param() in mm/percpu.c. Arch code
can use the set value to determine which first chunk allocator to use.
Signed-off-by: Tejun Heo <tj@kernel.org>
Diffstat (limited to 'arch/x86/kernel/setup_percpu.c')
-rw-r--r-- | arch/x86/kernel/setup_percpu.c | 24 |
1 files changed, 6 insertions, 18 deletions
diff --git a/arch/x86/kernel/setup_percpu.c b/arch/x86/kernel/setup_percpu.c index 1e17711..b961d99 100644 --- a/arch/x86/kernel/setup_percpu.c +++ b/arch/x86/kernel/setup_percpu.c @@ -267,16 +267,6 @@ static ssize_t __init setup_pcpu_page(size_t static_size) pcpup_populate_pte); } -/* for explicit first chunk allocator selection */ -static char pcpu_chosen_alloc[16] __initdata; - -static int __init percpu_alloc_setup(char *str) -{ - strncpy(pcpu_chosen_alloc, str, sizeof(pcpu_chosen_alloc) - 1); - return 0; -} -early_param("percpu_alloc", percpu_alloc_setup); - static inline void setup_percpu_segment(int cpu) { #ifdef CONFIG_X86_32 @@ -307,19 +297,17 @@ void __init setup_per_cpu_areas(void) * each allocator for details. */ ret = -EINVAL; - if (strlen(pcpu_chosen_alloc)) { - if (strcmp(pcpu_chosen_alloc, "page")) { - if (!strcmp(pcpu_chosen_alloc, "lpage")) + if (pcpu_chosen_fc != PCPU_FC_AUTO) { + if (pcpu_chosen_fc != PCPU_FC_PAGE) { + if (pcpu_chosen_fc == PCPU_FC_LPAGE) ret = setup_pcpu_lpage(static_size, true); - else if (!strcmp(pcpu_chosen_alloc, "embed")) - ret = setup_pcpu_embed(static_size, true); else - pr_warning("PERCPU: unknown allocator %s " - "specified\n", pcpu_chosen_alloc); + ret = setup_pcpu_embed(static_size, true); + if (ret < 0) pr_warning("PERCPU: %s allocator failed (%zd), " "falling back to page size\n", - pcpu_chosen_alloc, ret); + pcpu_fc_names[pcpu_chosen_fc], ret); } } else { ret = setup_pcpu_lpage(static_size, false); |