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| author |   Tony Luck <tony.luck@intel.com> | 2005-10-28 15:27:36 -0700 |
|---|---|---|
| committer | Tony Luck <tony.luck@intel.com> | 2005-10-28 15:27:36 -0700 |
| commit | 8496f2a4513edbc0c1d40496f1b0868dfed36eb0 (patch) | |
| tree | 18a772d7a4c42ec325539b52d2053dabc99c460a /arch/ia64/mm/tlb.c | |
| parent | Pull fix-bte-copy into release branch (diff) | |
| parent | [IA64] - Avoid slow TLB purges on SGI Altix systems (diff) | |
| download | linux-dev-8496f2a4513edbc0c1d40496f1b0868dfed36eb0.tar.xz linux-dev-8496f2a4513edbc0c1d40496f1b0868dfed36eb0.zip | |
Pull fix-slow-tlb-purge into release branch
Diffstat (limited to 'arch/ia64/mm/tlb.c')
| -rw-r--r-- | arch/ia64/mm/tlb.c | 16 |
1 files changed, 9 insertions, 7 deletions
diff --git a/arch/ia64/mm/tlb.c b/arch/ia64/mm/tlb.c index 987fb754d6ad..c93e0f2b5fea 100644 --- a/arch/ia64/mm/tlb.c +++ b/arch/ia64/mm/tlb.c @@ -87,10 +87,15 @@ wrap_mmu_context (struct mm_struct *mm) } void -ia64_global_tlb_purge (unsigned long start, unsigned long end, unsigned long nbits) +ia64_global_tlb_purge (struct mm_struct *mm, unsigned long start, unsigned long end, unsigned long nbits) { static DEFINE_SPINLOCK(ptcg_lock); + if (mm != current->active_mm) { + flush_tlb_all(); + return; + } + /* HW requires global serialization of ptc.ga. */ spin_lock(&ptcg_lock); { @@ -136,15 +141,12 @@ flush_tlb_range (struct vm_area_struct *vma, unsigned long start, unsigned long unsigned long size = end - start; unsigned long nbits; +#ifndef CONFIG_SMP if (mm != current->active_mm) { - /* this does happen, but perhaps it's not worth optimizing for? */ -#ifdef CONFIG_SMP - flush_tlb_all(); -#else mm->context = 0; -#endif return; } +#endif nbits = ia64_fls(size + 0xfff); while (unlikely (((1UL << nbits) & purge.mask) == 0) && (nbits < purge.max_bits)) @@ -154,7 +156,7 @@ flush_tlb_range (struct vm_area_struct *vma, unsigned long start, unsigned long start &= ~((1UL << nbits) - 1); # ifdef CONFIG_SMP - platform_global_tlb_purge(start, end, nbits); + platform_global_tlb_purge(mm, start, end, nbits); # else do { ia64_ptcl(start, (nbits<<2)); |