Messages in this thread Patch in this message | | | Date | Tue, 22 Apr 2008 16:30:44 +0100 | From | "Jan Beulich" <> | Subject | [PATCH] x86: avoid re-loading LDT in unrelated address spaces |
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Signed-off-by: Jan Beulich <jbeulich@novell.com>
--- arch/x86/kernel/ldt.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-)
--- linux-2.6.25/arch/x86/kernel/ldt.c 2008-04-17 04:49:44.000000000 +0200 +++ 2.6.25-x86-filter-load-ldt/arch/x86/kernel/ldt.c 2008-03-04 10:31:12.000000000 +0100 @@ -20,9 +20,9 @@ #include <asm/mmu_context.h> #ifdef CONFIG_SMP -static void flush_ldt(void *null) +static void flush_ldt(void *current_mm) { - if (current->active_mm) + if (current->active_mm == current_mm) load_LDT(¤t->active_mm->context); } #endif @@ -68,7 +68,7 @@ static int alloc_ldt(mm_context_t *pc, i load_LDT(pc); mask = cpumask_of_cpu(smp_processor_id()); if (!cpus_equal(current->mm->cpu_vm_mask, mask)) - smp_call_function(flush_ldt, NULL, 1, 1); + smp_call_function(flush_ldt, current->mm, 1, 1); preempt_enable(); #else load_LDT(pc);
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