Messages in this thread Patch in this message | | | From | Alexander Holler <> | Subject | [PATCH 2/2] x86: memtest: remove unnecessary round to leave memtest with zeroed mem | Date | Wed, 21 Nov 2012 17:24:11 +0100 |
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By just reversing the order memtest is using the test patterns, an additional round to zero the memory is not necessary.
This makes it a bit faster.
Signed-off-by: Alexander Holler <holler@ahsoftware.de> --- arch/x86/mm/memtest.c | 11 ++--------- 1 files changed, 2 insertions(+), 9 deletions(-)
diff --git a/arch/x86/mm/memtest.c b/arch/x86/mm/memtest.c index 855a6d5..da80083 100644 --- a/arch/x86/mm/memtest.c +++ b/arch/x86/mm/memtest.c @@ -9,7 +9,7 @@ #include <linux/memblock.h> static u64 patterns[] __initdata = { - 0, + 0, /* Has has to be 0 to leave memtest with zeroed memory */ 0xffffffffffffffffULL, 0x5555555555555555ULL, 0xaaaaaaaaaaaaaaaaULL, @@ -112,15 +112,8 @@ void __init early_memtest(unsigned long start, unsigned long end) return; pr_info("early_memtest: # of tests: %d\n", memtest_pattern); - for (i = 0; i < memtest_pattern; i++) { + for (i = memtest_pattern-1; i < UINT_MAX; --i) { idx = i % ARRAY_SIZE(patterns); do_one_pass(patterns[idx], start, end); } - - if (idx > 0) { - printk(KERN_INFO "early_memtest: wipe out " - "test pattern from memory\n"); - /* additional test with pattern 0 will do this */ - do_one_pass(0, start, end); - } } -- 1.7.8.6
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