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Re: [COUNTERPATCH] mm: avoid overflowing preempt_count() in mmu_take_all_locks()

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From: Andrea Arcangeli
Subject: Re: [COUNTERPATCH] mm: avoid overflowing preempt_count() in mmu_take_all_locks()
Date: Thursday, April 1, 2010 - 9:02 am

On Thu, Apr 01, 2010 at 06:51:17PM +0300, Avi Kivity wrote:

We can always switch to srcu. Switching to srcu is not a noop for all
mmu notifier invalidates only after these locks can schedule. At that
point, so with srcu + mutex in the rmap locks, all the mmu notifier
invalidates can schedule, allowing XPMEM to be synchronous its
invalidates, and making it safe.
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Messages in current thread:
[PATCH] increase PREEMPT_BITS to 12 to avoid overflow when ..., Rik van Riel, (Tue Mar 30, 10:36 am)
Re: [PATCH] increase PREEMPT_BITS to 12 to avoid overflow ..., Peter Zijlstra, (Tue Mar 30, 10:56 am)
Re: [PATCH] increase PREEMPT_BITS to 12 to avoid overflow ..., Rik van Riel, (Tue Mar 30, 11:05 am)
Re: [PATCH] increase PREEMPT_BITS to 12 to avoid overflow ..., Peter Zijlstra, (Tue Mar 30, 11:34 am)
[COUNTERPATCH] mm: avoid overflowing preempt_count() in m ..., Avi Kivity, (Thu Apr 1, 2:40 am)
Re: [COUNTERPATCH] mm: avoid overflowing preempt_count() i ..., Peter Zijlstra, (Thu Apr 1, 3:31 am)
Re: [COUNTERPATCH] mm: avoid overflowing preempt_count() i ..., Thomas Gleixner, (Thu Apr 1, 4:04 am)
Re: [COUNTERPATCH] mm: avoid overflowing preempt_count() i ..., Avi Kivity, (Thu Apr 1, 4:09 am)
Re: [COUNTERPATCH] mm: avoid overflowing preempt_count() i ..., Avi Kivity, (Thu Apr 1, 4:13 am)
Re: [COUNTERPATCH] mm: avoid overflowing preempt_count() i ..., Peter Zijlstra, (Thu Apr 1, 4:16 am)
Re: [COUNTERPATCH] mm: avoid overflowing preempt_count() i ..., Avi Kivity, (Thu Apr 1, 4:17 am)
Re: [COUNTERPATCH] mm: avoid overflowing preempt_count() i ..., Avi Kivity, (Thu Apr 1, 4:19 am)
Re: [COUNTERPATCH] mm: avoid overflowing preempt_count() i ..., Peter Zijlstra, (Thu Apr 1, 4:27 am)
Re: [COUNTERPATCH] mm: avoid overflowing preempt_count() i ..., Peter Zijlstra, (Thu Apr 1, 4:43 am)
Re: [COUNTERPATCH] mm: avoid overflowing preempt_count() i ..., Avi Kivity, (Thu Apr 1, 4:47 am)
Re: [COUNTERPATCH] mm: avoid overflowing preempt_count() i ..., Rik van Riel, (Thu Apr 1, 7:16 am)
Re: [COUNTERPATCH] mm: avoid overflowing preempt_count() i ..., Andrea Arcangeli, (Thu Apr 1, 8:32 am)
Re: [COUNTERPATCH] mm: avoid overflowing preempt_count() i ..., Andrea Arcangeli, (Thu Apr 1, 8:36 am)
Re: [COUNTERPATCH] mm: avoid overflowing preempt_count() i ..., Avi Kivity, (Thu Apr 1, 8:37 am)
Re: [COUNTERPATCH] mm: avoid overflowing preempt_count() i ..., Avi Kivity, (Thu Apr 1, 8:39 am)
Re: [COUNTERPATCH] mm: avoid overflowing preempt_count() i ..., Andrea Arcangeli, (Thu Apr 1, 8:42 am)
Re: [COUNTERPATCH] mm: avoid overflowing preempt_count() i ..., Peter Zijlstra, (Thu Apr 1, 8:50 am)
Re: [COUNTERPATCH] mm: avoid overflowing preempt_count() i ..., Avi Kivity, (Thu Apr 1, 8:51 am)
Re: [COUNTERPATCH] mm: avoid overflowing preempt_count() i ..., Andrea Arcangeli, (Thu Apr 1, 8:54 am)
Re: [COUNTERPATCH] mm: avoid overflowing preempt_count() i ..., Peter Zijlstra, (Thu Apr 1, 8:56 am)
Re: [COUNTERPATCH] mm: avoid overflowing preempt_count() i ..., Peter Zijlstra, (Thu Apr 1, 8:56 am)
Re: [COUNTERPATCH] mm: avoid overflowing preempt_count() i ..., Andrea Arcangeli, (Thu Apr 1, 9:00 am)
Re: [COUNTERPATCH] mm: avoid overflowing preempt_count() i ..., Andrea Arcangeli, (Thu Apr 1, 9:02 am)
Re: [COUNTERPATCH] mm: avoid overflowing preempt_count() i ..., Avi Kivity, (Thu Apr 1, 9:02 am)
Re: [COUNTERPATCH] mm: avoid overflowing preempt_count() i ..., Avi Kivity, (Thu Apr 1, 9:06 am)
Re: [COUNTERPATCH] mm: avoid overflowing preempt_count() i ..., Andrea Arcangeli, (Thu Apr 1, 9:07 am)
Re: [COUNTERPATCH] mm: avoid overflowing preempt_count() i ..., Andrea Arcangeli, (Thu Apr 1, 9:08 am)
Re: [COUNTERPATCH] mm: avoid overflowing preempt_count() i ..., Peter Zijlstra, (Thu Apr 1, 9:12 am)
Re: [COUNTERPATCH] mm: avoid overflowing preempt_count() i ..., Andrea Arcangeli, (Thu Apr 1, 9:12 am)
Re: [COUNTERPATCH] mm: avoid overflowing preempt_count() i ..., Paul E. McKenney, (Thu Apr 1, 9:14 am)
Re: [COUNTERPATCH] mm: avoid overflowing preempt_count() i ..., Paul E. McKenney, (Thu Apr 1, 9:15 am)
Re: [COUNTERPATCH] mm: avoid overflowing preempt_count() i ..., Andrea Arcangeli, (Thu Apr 1, 9:18 am)
Re: [COUNTERPATCH] mm: avoid overflowing preempt_count() i ..., Peter Zijlstra, (Thu Apr 1, 9:32 am)
Re: [COUNTERPATCH] mm: avoid overflowing preempt_count() i ..., Peter Zijlstra, (Thu Apr 1, 9:36 am)
Re: [COUNTERPATCH] mm: avoid overflowing preempt_count() i ..., Peter Zijlstra, (Thu Apr 1, 9:45 am)
Re: [COUNTERPATCH] mm: avoid overflowing preempt_count() i ..., Peter Zijlstra, (Thu Apr 1, 9:49 am)
Re: [COUNTERPATCH] mm: avoid overflowing preempt_count() i ..., Paul E. McKenney, (Thu Apr 1, 10:02 am)
Re: [COUNTERPATCH] mm: avoid overflowing preempt_count() i ..., Andrea Arcangeli, (Thu Apr 1, 10:04 am)