Arjan van de Ven a9ba9a3b38 [PATCH] x86_64: prefetch the mmap_sem in the fault path ... In a micro-benchmark that stresses the pagefault path, the down_read_trylock on the mmap_sem showed up quite high on the profile. Turns out this lock is bouncing between cpus quite a bit and thus is cache-cold a lot. This patch prefetches the lock (for write) as early as possible (and before some other somewhat expensive operations). With this patch, the down_read_trylock basically fell out of the top of profile. Signed-off-by: Arjan van de Ven <arjan@linux.intel.com> Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>		2006-03-25 09:10:54 -08:00
..
boot	Merge ssh://master.kernel.org/pub/scm/linux/kernel/git/sam/kbuild	2006-01-10 08:21:33 -08:00
crypto	[CRYPTO] aes: Fixed array boundary violation	2006-03-21 20:14:10 +11:00
ia32	[PATCH] sys_alarm() unsigned signed conversion fixup	2006-03-25 08:22:48 -08:00
kernel	[PATCH] x86_64: to use lapic ids instead of initial apic ids	2006-03-25 09:10:54 -08:00
lib	[PATCH] x86_64: remove dead do_softirq_thunk	2006-03-25 09:10:53 -08:00
mm	[PATCH] x86_64: prefetch the mmap_sem in the fault path	2006-03-25 09:10:54 -08:00
oprofile	[PATCH] Move Kprobes and Oprofile to "Instrumentation Support" menu	2005-11-07 07:53:35 -08:00
pci	[PATCH] x86_64: {set,clear,test}_bit() related cleanup and pci_mmcfg_init() fix	2006-03-24 07:33:15 -08:00
defconfig	[PATCH] x86_64: Update defconfig	2006-03-25 09:10:52 -08:00
Kconfig	Make Kprobes depend on modules	2006-02-26 20:24:40 -08:00
Kconfig.debug	[PATCH] x86_64: Remove CONFIG_INIT_DEBUG	2006-02-04 16:43:13 -08:00
Makefile	[PATCH] x86-64: Use -mtune=generic for generic kernels	2006-03-25 09:10:52 -08:00