a18ff1bde0
flush_thread doesn't need to do a full page table walk in order to clear the address space. It knows what the end result needs to be, so it can call unmap directly. This results in a 10-20% speedup in an exec from bash. Signed-off-by: Jeff Dike <jdike@linux.intel.com> Cc: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
41 lines
871 B
C
41 lines
871 B
C
/*
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* Copyright (C) 2002 Jeff Dike (jdike@karaya.com)
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* Licensed under the GPL
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*/
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#include "linux/kernel.h"
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#include "asm/current.h"
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#include "asm/page.h"
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#include "asm/signal.h"
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#include "asm/ptrace.h"
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#include "asm/uaccess.h"
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#include "asm/mmu_context.h"
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#include "tlb.h"
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#include "skas.h"
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#include "um_mmu.h"
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#include "os.h"
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void flush_thread_skas(void)
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{
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void *data = NULL;
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unsigned long end = proc_mm ? task_size : CONFIG_STUB_START;
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int ret;
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ret = unmap(¤t->mm->context.skas.id, 0, end, 1, &data);
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if(ret){
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printk("flush_thread_skas - clearing address space failed, "
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"err = %d\n", ret);
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force_sig(SIGKILL, current);
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}
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switch_mm_skas(¤t->mm->context.skas.id);
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}
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void start_thread_skas(struct pt_regs *regs, unsigned long eip,
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unsigned long esp)
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{
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set_fs(USER_DS);
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PT_REGS_IP(regs) = eip;
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PT_REGS_SP(regs) = esp;
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}
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