diff options
| author | Anton Blanchard <anton@samba.org> | 2010-01-12 00:50:14 +0000 |
|---|---|---|
| committer | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2010-02-03 17:39:48 +1100 |
| commit | 5be3492f972b73051ead7ecbac6fb9efd1e8e0ec (patch) | |
| tree | c0c66a38665af53673792246f21198c119e8c7d4 | |
| parent | 61c03ddbdff2e080702521bc1b757854ca58c46a (diff) | |
| download | linux-5be3492f972b73051ead7ecbac6fb9efd1e8e0ec.tar.bz2 | |
powerpc: Mark some variables in the page fault path __read_mostly
Using perf to trace L1 dcache misses and dumping data addresses I found a few
variables taking a lot of misses. Since they are almost never written, they
should go into the __read_mostly section.
Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
| -rw-r--r-- | arch/powerpc/kernel/traps.c | 14 | ||||
| -rw-r--r-- | arch/powerpc/xmon/xmon.c | 2 |
2 files changed, 8 insertions, 8 deletions
diff --git a/arch/powerpc/kernel/traps.c b/arch/powerpc/kernel/traps.c index d069ff8a7e03..4588d1eb18d2 100644 --- a/arch/powerpc/kernel/traps.c +++ b/arch/powerpc/kernel/traps.c @@ -60,13 +60,13 @@ #endif #if defined(CONFIG_DEBUGGER) || defined(CONFIG_KEXEC) -int (*__debugger)(struct pt_regs *regs); -int (*__debugger_ipi)(struct pt_regs *regs); -int (*__debugger_bpt)(struct pt_regs *regs); -int (*__debugger_sstep)(struct pt_regs *regs); -int (*__debugger_iabr_match)(struct pt_regs *regs); -int (*__debugger_dabr_match)(struct pt_regs *regs); -int (*__debugger_fault_handler)(struct pt_regs *regs); +int (*__debugger)(struct pt_regs *regs) __read_mostly; +int (*__debugger_ipi)(struct pt_regs *regs) __read_mostly; +int (*__debugger_bpt)(struct pt_regs *regs) __read_mostly; +int (*__debugger_sstep)(struct pt_regs *regs) __read_mostly; +int (*__debugger_iabr_match)(struct pt_regs *regs) __read_mostly; +int (*__debugger_dabr_match)(struct pt_regs *regs) __read_mostly; +int (*__debugger_fault_handler)(struct pt_regs *regs) __read_mostly; EXPORT_SYMBOL(__debugger); EXPORT_SYMBOL(__debugger_ipi); diff --git a/arch/powerpc/xmon/xmon.c b/arch/powerpc/xmon/xmon.c index 4e6152c13764..8bad7d5f32af 100644 --- a/arch/powerpc/xmon/xmon.c +++ b/arch/powerpc/xmon/xmon.c @@ -61,7 +61,7 @@ static int xmon_owner; static int xmon_gate; #endif /* CONFIG_SMP */ -static unsigned long in_xmon = 0; +static unsigned long in_xmon __read_mostly = 0; static unsigned long adrs; static int size = 1; |