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Benjamin Herrenschmidt 8ec8f2e85c [POWERPC] Fix performance regression in IRQ radix tree locking 
When reworking the powerpc irq code, I figured out that we were using
the radix tree in a racy way. As a temporary fix, I put a spinlock in
there. However, this can have a significant impact on performances. This
patch reworks that to use a smarter technique based on the fact that
what we need is in fact a rwlock with extremely rare writers (thus
optimized for the read path).

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-08-30 10:36:16 +10:00
..
alpha [PATCH] arch/alpha: Use ARRAY_SIZE macro 2006-07-31 13:28:38 -07:00
arm [ARM] 3739/1: genirq updates: irq_chip, add and use irq_chip.name 2006-08-01 22:26:25 +01:00
arm26 [PATCH] tty: Remove include of screen_info.h from tty.h 2006-07-10 13:24:16 -07:00
cris [PATCH] pcf8563: remove MOD_INC_USE_COUNT, MOD_DEC_USE_COUNT 2006-07-10 13:24:22 -07:00
frv [PATCH] FRV: Introduce asm-offsets for FRV arch 2006-07-10 13:24:22 -07:00
h8300 [PATCH] irq-flags: H8300: Use the new IRQF_ constants 2006-07-02 13:58:47 -07:00
i386 [CPUFREQ] Propagate acpi_processor_preregister_performance return value. 2006-07-31 18:37:06 -04:00
ia64 [IA64] make uncached allocator more node aware 2006-08-04 10:27:27 -07:00
m32r [PATCH] tty: Remove include of screen_info.h from tty.h 2006-07-10 13:24:16 -07:00
m68k [PATCH] irq-flags: M68K: Use the new IRQF_ constants 2006-07-02 13:58:47 -07:00
m68knommu [PATCH] irq-flags: M68KNOMMU: Use the new IRQF_ constants 2006-07-02 13:58:47 -07:00
mips [MIPS] sparsemem: fix crash in show_mem 2006-07-13 21:26:22 +01:00
parisc [PATCH] vDSO hash-style fix 2006-07-31 13:28:43 -07:00
powerpc [POWERPC] Fix performance regression in IRQ radix tree locking 2006-08-30 10:36:16 +10:00
ppc [POWERPC] back up old school ipic.[hc] to arch/ppc 2006-08-30 10:34:33 +10:00
s390 [PATCH] cpu hotplug: use hotplug version of registration in late inits 2006-07-31 13:28:39 -07:00
sh [PATCH] sh: fix proc file removal for superh store queue module 2006-08-06 08:57:48 -07:00
sh64 [PATCH] tty: Remove include of screen_info.h from tty.h 2006-07-10 13:24:16 -07:00
sparc [SPARC]: Defer clock_probe to fs_initcall() 2006-07-27 22:08:01 -07:00
sparc64 [SPARC64]: Explicitly print return PC when the kernel fault PC is bogus. 2006-07-24 22:33:58 -07:00
um [PATCH] vDSO hash-style fix 2006-07-31 13:28:43 -07:00
v850 [PATCH] v850: call init_page_count() instead of set_page_count() 2006-07-31 13:28:38 -07:00
x86_64 [PATCH] Fix more per-cpu typos 2006-08-06 08:57:47 -07:00
xtensa [PATCH] panic_on_oops: remove ssleep() 2006-07-31 13:28:39 -07:00