diff options
| author | Alexander Holler <holler@ahsoftware.de> | 2013-02-16 16:38:17 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2013-02-18 09:28:42 +0100 |
| commit | 20bf062c6575e162ede00308ca3a5714ca112009 (patch) | |
| tree | 73d5a41bd4026e3b8159b0a6f41fd63c2e395465 | |
| parent | 9611dc7a8de8a5c6244886dad020995b1a896236 (diff) | |
x86/memtest: Shorten time for tests
By just reversing the order memtest is using the test patterns,
an additional round to zero the memory is not necessary.
This might save up to a second or even more for setups which are
doing tests on every boot.
Signed-off-by: Alexander Holler <holler@ahsoftware.de>
Cc: Yinghai Lu <yinghai@kernel.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/1361029097-8308-1-git-send-email-holler@ahsoftware.de
Signed-off-by: Ingo Molnar <mingo@kernel.org>
| -rw-r--r-- | arch/x86/mm/memtest.c | 10 |
1 files changed, 2 insertions, 8 deletions
diff --git a/arch/x86/mm/memtest.c b/arch/x86/mm/memtest.c index c80b9fb95734..8dabbed409ee 100644 --- a/arch/x86/mm/memtest.c +++ b/arch/x86/mm/memtest.c @@ -9,6 +9,7 @@ #include <linux/memblock.h> static u64 patterns[] __initdata = { + /* The first entry has to be 0 to leave memtest with zeroed memory */ 0, 0xffffffffffffffffULL, 0x5555555555555555ULL, @@ -110,15 +111,8 @@ void __init early_memtest(unsigned long start, unsigned long end) return; printk(KERN_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); - } } |