There is absolutely no reason to flush the kernel's VM area during a
tlb_flush_mm.
This results in a noticable performance increase in the kernel build
benchmark.
Signed-off-by: Jeff Dike <[email protected]>
Index: linux-2.6.12/arch/um/kernel/skas/tlb.c
===================================================================
--- linux-2.6.12.orig/arch/um/kernel/skas/tlb.c 2005-06-20 11:54:56.000000000 -0400
+++ linux-2.6.12/arch/um/kernel/skas/tlb.c 2005-06-20 12:11:00.000000000 -0400
@@ -76,7 +76,6 @@ void flush_tlb_mm_skas(struct mm_struct
return;
fix_range(mm, 0, host_task_size, 0);
- flush_tlb_kernel_range_common(start_vm, end_vm);
}
void force_flush_all_skas(void)
-
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