| commit | 8ba23a4aa99c85964519dc2baca434a021aee4f8 | |
| author | Mike Ditto <mditto@google.com> | |
| Wed, 24 Aug 2011 23:46:17 +0000 (25 09:46 +1000) | ||
| committer | Stephen Rothwell <sfr@canb.auug.org.au> | |
| Thu, 25 Aug 2011 05:34:04 +0000 (25 15:34 +1000) | ||
| tree | 9ea3cfdfd2a8d13a892983219422fbf67be15615 | treesnapshot (tar.gz zip) |
| parent | 541db9c90290ed6ccf104e456b8cc73139a148c9 | commitdiff |
Replace the bubble sort in sanitize_e820_map() with a call to the generic
kernel sort function to avoid pathological performance with large maps.
On large (thousands of entries) E820 maps, the previous code took minutes
to run; with this change it's now milliseconds.
Signed-off-by: Mike Ditto <mditto@google.com>
Cc: Stefan Assmann <sassmann@kpanic.de>
Cc: Nancy Yuen <yuenn@google.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
kernel sort function to avoid pathological performance with large maps.
On large (thousands of entries) E820 maps, the previous code took minutes
to run; with this change it's now milliseconds.
Signed-off-by: Mike Ditto <mditto@google.com>
Cc: Stefan Assmann <sassmann@kpanic.de>
Cc: Nancy Yuen <yuenn@google.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
| arch/x86/kernel/e820.c | diffblobblamehistory |