Re: [PATCH 1/6] lockdep: allow to disable reclaim lockup detection
From: Matthew Wilcox <willy@infradead.org>
Date: 2017-02-06 14:26:41
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ceph-devel, linux-btrfs, linux-f2fs-devel, linux-fsdevel, linux-mm, linux-nfs, linux-xfs, lkml
On Mon, Feb 06, 2017 at 03:07:13PM +0100, Michal Hocko wrote:
While we are at it also make sure that the radix tree doesn't accidentaly override tags stored in the upper part of the gfp_mask.
quoted hunk ↗ jump to hunk
diff --git a/lib/radix-tree.c b/lib/radix-tree.c index 9dc093d5ef39..7550be09f9d6 100644 --- a/lib/radix-tree.c +++ b/lib/radix-tree.c@@ -2274,6 +2274,8 @@ static int radix_tree_cpu_dead(unsigned int cpu) void __init radix_tree_init(void) { int ret; + + BUILD_BUG_ON(RADIX_TREE_MAX_TAGS + __GFP_BITS_SHIFT > 32); radix_tree_node_cachep = kmem_cache_create("radix_tree_node", sizeof(struct radix_tree_node), 0, SLAB_PANIC | SLAB_RECLAIM_ACCOUNT,
That's going to have a conceptual conflict with some patches I have in flight. I'll take this part through my radix tree patch collection. -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@kvack.org"> email@kvack.org </a>