From: Martin Schwidefsky <[EMAIL PROTECTED]>
If need_resched() is false it is unnecessary to call tlb_finish_mmu()
and tlb_gather_mmu() for each vma in unmap_vmas(). Moving the tlb gather
restart under the if that contains the cond_resched() will avoid
unnecessary tlb flush operations that are triggered by tlb_finish_mmu()
and tlb_gather_mmu().
Signed-off-by: Martin Schwidefsky <[EMAIL PROTECTED]>
---
mm/memory.c | 7 +++----
1 files changed, 3 insertions(+), 4 deletions(-)
diff -urpN linux-2.6/mm/memory.c linux-2.6-patched/mm/memory.c
--- linux-2.6/mm/memory.c 2007-06-29 15:44:08.000000000 +0200
+++ linux-2.6-patched/mm/memory.c 2007-06-29 15:44:08.000000000 +0200
@@ -851,19 +851,18 @@ unsigned long unmap_vmas(struct mmu_gath
break;
}
- tlb_finish_mmu(*tlbp, tlb_start, start);
-
if (need_resched() ||
(i_mmap_lock && need_lockbreak(i_mmap_lock))) {
+ tlb_finish_mmu(*tlbp, tlb_start, start);
if (i_mmap_lock) {
*tlbp = NULL;
goto out;
}
cond_resched();
+ *tlbp = tlb_gather_mmu(vma->vm_mm, fullmm);
+ tlb_start_valid = 0;
}
- *tlbp = tlb_gather_mmu(vma->vm_mm, fullmm);
- tlb_start_valid = 0;
zap_work = ZAP_BLOCK_SIZE;
}
}
--
blue skies,
Martin.
"Reality continues to ruin my life." - Calvin.
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [EMAIL PROTECTED]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
