Messages in this thread | | | Date | Tue, 24 Jun 2014 17:44:13 +0200 | From | Vlastimil Babka <> | Subject | Re: [PATCH v3 06/13] mm, compaction: periodically drop lock and restore IRQs in scanners |
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On 06/24/2014 05:39 PM, Naoya Horiguchi wrote: > On Fri, Jun 20, 2014 at 05:49:36PM +0200, Vlastimil Babka wrote: >> Compaction scanners regularly check for lock contention and need_resched() >> through the compact_checklock_irqsave() function. However, if there is no >> contention, the lock can be held and IRQ disabled for potentially long time. >> >> This has been addressed by commit b2eef8c0d0 ("mm: compaction: minimise the >> time IRQs are disabled while isolating pages for migration") for the migration >> scanner. However, the refactoring done by commit 748446bb6b ("mm: compaction: >> acquire the zone->lru_lock as late as possible") has changed the conditions so > > You seem to refer to the incorrect commit, maybe you meant commit 2a1402aa044b?
Oops, right. Thanks!
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