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Date: Tue, 06 Jan 2009 10:16:32 -0600 From: Roman Kononov <kononov@...l.net> To: linux-kernel@...r.kernel.org Cc: linux-kernel@...r.kernel.org Subject: Re: [patch] mm: fix lockless pagecache reordering bug (was Re: BUG: soft lockup - is this XFS problem?) On 2009-01-05 20:05 Nick Piggin said the following: > Subject: mm lockless pagecache barrier fix > static inline void *radix_tree_deref_slot(void **pslot) > { > - void *ret = *pslot; > + void *ret = rcu_dereference(*pslot); > if (unlikely(radix_tree_is_indirect_ptr(ret))) > ret = RADIX_TREE_RETRY; > return ret; 3 systems are working fine for a few hours with the patch. They would fail within 20 minutes without it. Thanks. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/