Messages in this thread Patch in this message | | | Subject | [PATCH] don't use flush_tlb_all in suspend time | From | Shaohua Li <> | Date | Sun, 30 Apr 2006 11:24:22 +0800 |
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flush_tlb_all uses on_each_cpu, which will disable/enable interrupt. In suspend/resume time, this will make interrupt wrongly enabled.
Signed-off-by: Shaohua Li <shaohua.li@intel.com> ---
linux-2.6.17-rc3-root/arch/i386/kernel/acpi/sleep.c | 2 +- linux-2.6.17-rc3-root/arch/i386/mm/init.c | 5 ++++- linux-2.6.17-rc3-root/arch/x86_64/kernel/acpi/sleep.c | 4 ++-- 3 files changed, 7 insertions(+), 4 deletions(-)
diff -puN arch/i386/kernel/acpi/sleep.c~flush_tlb_all_check arch/i386/kernel/acpi/sleep.c --- linux-2.6.17-rc3/arch/i386/kernel/acpi/sleep.c~flush_tlb_all_check 2006-04-29 08:45:24.000000000 +0800 +++ linux-2.6.17-rc3-root/arch/i386/kernel/acpi/sleep.c 2006-04-29 08:46:49.000000000 +0800 @@ -29,7 +29,7 @@ static void init_low_mapping(pgd_t * pgd set_pgd(pgd, *(pgd + USER_PTRS_PER_PGD)); pgd_ofs++, pgd++; } - flush_tlb_all(); + local_flush_tlb(); } /** diff -puN arch/i386/mm/init.c~flush_tlb_all_check arch/i386/mm/init.c --- linux-2.6.17-rc3/arch/i386/mm/init.c~flush_tlb_all_check 2006-04-29 08:47:05.000000000 +0800 +++ linux-2.6.17-rc3-root/arch/i386/mm/init.c 2006-04-29 08:48:15.000000000 +0800 @@ -420,7 +420,10 @@ void zap_low_mappings (void) #else set_pgd(swapper_pg_dir+i, __pgd(0)); #endif - flush_tlb_all(); + if (cpus_weight(cpu_online_map) == 1) + local_flush_tlb(); + else + flush_tlb_all(); } static int disable_nx __initdata = 0; diff -puN arch/x86_64/kernel/acpi/sleep.c~flush_tlb_all_check arch/x86_64/kernel/acpi/sleep.c --- linux-2.6.17-rc3/arch/x86_64/kernel/acpi/sleep.c~flush_tlb_all_check 2006-04-29 09:16:48.000000000 +0800 +++ linux-2.6.17-rc3-root/arch/x86_64/kernel/acpi/sleep.c 2006-04-29 09:17:19.000000000 +0800 @@ -66,7 +66,7 @@ static void init_low_mapping(void) pgd_t *slot0 = pgd_offset(current->mm, 0UL); low_ptr = *slot0; set_pgd(slot0, *pgd_offset(current->mm, PAGE_OFFSET)); - flush_tlb_all(); + local_flush_tlb(); } /** @@ -92,7 +92,7 @@ int acpi_save_state_mem(void) void acpi_restore_state_mem(void) { set_pgd(pgd_offset(current->mm, 0UL), low_ptr); - flush_tlb_all(); + local_flush_tlb(); } /** _
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