On Fri, 23 Mar 2001, Stephen C. Tweedie wrote:
>
> The patch below is for two races in sysV shared memory.
+ spin_lock (&info->lock);
+
+ /* The shmem_swp_entry() call may have blocked, and
+ * shmem_writepage may have been moving a page between the page
+ * cache and swap cache. We need to recheck the page cache
+ * under the protection of the info->lock spinlock. */
+
+ page = find_lock_page(mapping, idx);
Ehh.. Sleeping with the spin-lock held? Sounds like a truly bad idea.
Linus
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This archive was generated by hypermail 2b29 : Fri Mar 23 2001 - 21:00:21 EST