From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pa0-f53.google.com (mail-pa0-f53.google.com [209.85.220.53]) by kanga.kvack.org (Postfix) with ESMTP id 9FDE26B025F for ; Wed, 6 Apr 2016 17:27:54 -0400 (EDT) Received: by mail-pa0-f53.google.com with SMTP id fe3so40539662pab.1 for ; Wed, 06 Apr 2016 14:27:54 -0700 (PDT) Received: from mga04.intel.com (mga04.intel.com. [192.55.52.120]) by mx.google.com with ESMTP id o68si6894186pfj.173.2016.04.06.14.21.55 for ; Wed, 06 Apr 2016 14:21:55 -0700 (PDT) From: Matthew Wilcox Subject: [PATCH 29/30] radix-tree: Fix radix_tree_dump() for multi-order entries Date: Wed, 6 Apr 2016 17:21:38 -0400 Message-Id: <1459977699-2349-30-git-send-email-willy@linux.intel.com> In-Reply-To: <1459977699-2349-1-git-send-email-willy@linux.intel.com> References: <1459977699-2349-1-git-send-email-willy@linux.intel.com> Sender: owner-linux-mm@kvack.org List-ID: To: linux-kernel@vger.kernel.org, Andrew Morton Cc: Ross Zwisler , linux-mm@kvack.org, linux-fsdevel@vger.kernel.org, Konstantin Khlebnikov , Kirill Shutemov , Jan Kara , Neil Brown , Matthew Wilcox From: Ross Zwisler - Print which indices are covered by every leaf entry - Print sibling entries - Print the node pointer instead of the slot entry - Build by default in userspace, and make it accessible to the test-suite Signed-off-by: Ross Zwisler Signed-off-by: Matthew Wilcox --- lib/radix-tree.c | 46 +++++++++++++++++++++++++---------------- tools/testing/radix-tree/test.h | 1 + 2 files changed, 29 insertions(+), 18 deletions(-) diff --git a/lib/radix-tree.c b/lib/radix-tree.c index fa7842cb814e..0402c4f1a344 100644 --- a/lib/radix-tree.c +++ b/lib/radix-tree.c @@ -215,27 +215,36 @@ radix_tree_find_next_bit(const unsigned long *addr, return size; } -#if 0 -static void dump_node(void *slot, int height, int offset) +#ifndef __KERNEL__ +static void dump_node(struct radix_tree_node *node, unsigned offset, + unsigned shift, unsigned long index) { - struct radix_tree_node *node; int i; - if (!slot) - return; - - if (height == 0) { - pr_debug("radix entry %p offset %d\n", slot, offset); - return; - } - - node = indirect_to_ptr(slot); pr_debug("radix node: %p offset %d tags %lx %lx %lx path %x count %d parent %p\n", - slot, offset, node->tags[0][0], node->tags[1][0], - node->tags[2][0], node->path, node->count, node->parent); - - for (i = 0; i < RADIX_TREE_MAP_SIZE; i++) - dump_node(node->slots[i], height - 1, i); + node, offset, + node->tags[0][0], node->tags[1][0], node->tags[2][0], + node->path, node->count, node->parent); + + for (i = 0; i < RADIX_TREE_MAP_SIZE; i++) { + unsigned long first = index | (i << shift); + unsigned long last = first | ((1 << shift) - 1); + void *entry = node->slots[i]; + if (!entry) + continue; + if (is_sibling_entry(node, entry)) { + pr_debug("radix sblng %p offset %d val %p indices %ld-%ld\n", + entry, i, + *(void **)indirect_to_ptr(entry), + first, last); + } else if (!radix_tree_is_indirect_ptr(entry)) { + pr_debug("radix entry %p offset %d indices %ld-%ld\n", + entry, offset, first, last); + } else { + dump_node(indirect_to_ptr(entry), i, + shift - RADIX_TREE_MAP_SHIFT, first); + } + } } /* For debug */ @@ -246,7 +255,8 @@ static void radix_tree_dump(struct radix_tree_root *root) root->gfp_mask >> __GFP_BITS_SHIFT); if (!radix_tree_is_indirect_ptr(root->rnode)) return; - dump_node(root->rnode, root->height, 0); + dump_node(indirect_to_ptr(root->rnode), 0, + (root->height - 1) * RADIX_TREE_MAP_SHIFT, 0); } #endif diff --git a/tools/testing/radix-tree/test.h b/tools/testing/radix-tree/test.h index 53cb595db44a..67217c93fe95 100644 --- a/tools/testing/radix-tree/test.h +++ b/tools/testing/radix-tree/test.h @@ -40,5 +40,6 @@ extern int nr_allocated; /* Normally private parts of lib/radix-tree.c */ void *indirect_to_ptr(void *ptr); +void radix_tree_dump(struct radix_tree_root *root); int root_tag_get(struct radix_tree_root *root, unsigned int tag); unsigned long radix_tree_maxindex(unsigned int height); -- 2.8.0.rc3 -- 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: email@kvack.org