Messages in this thread Patch in this message | | | Subject | [PATCH] Make sure the size of a wait-queue hashtable isn't 1 | Date | Mon, 9 Dec 2002 18:02:11 +0900 (JST) | From | (Miles Bader) |
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The hash_long function in <linux/hash.h> returns bogus results for size 1 hashtables, and wait-queue hashtables can reach that limit for small-memory systems, so this patch makes the minimum size 4.
This fix was suggested by Andrew Morton.
diff -ruN -X../cludes ../orig/linux-2.5.50-uc0/mm/page_alloc.c mm/page_alloc.c --- ../orig/linux-2.5.50-uc0/mm/page_alloc.c 2002-11-25 10:30:10.000000000 +0900 +++ mm/page_alloc.c 2002-12-09 11:33:33.000000000 +0900 @@ -961,7 +961,9 @@ */ size = min(size, 4096UL); - return size; + /* The `hash_long' function can't handle tables of size 1, so make + sure we don't create one. */ + return max(size, 4UL); } /* - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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