Message ID | 20210428153542.2814175-93-Liam.Howlett@Oracle.com (mailing list archive) |
---|---|
State | New, archived |
Headers | show
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Wed, 28 Apr 2021 15:38:00 +0000 Received: from MWHPR10MB1582.namprd10.prod.outlook.com ([fe80::353a:1802:6e91:1811]) by MWHPR10MB1582.namprd10.prod.outlook.com ([fe80::353a:1802:6e91:1811%8]) with mapi id 15.20.4065.027; Wed, 28 Apr 2021 15:38:00 +0000 From: Liam Howlett <liam.howlett@oracle.com> To: "maple-tree@lists.infradead.org" <maple-tree@lists.infradead.org>, "linux-mm@kvack.org" <linux-mm@kvack.org>, "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>, Andrew Morton <akpm@linux-foundation.org> CC: Song Liu <songliubraving@fb.com>, Davidlohr Bueso <dave@stgolabs.net>, "Paul E . McKenney" <paulmck@kernel.org>, Matthew Wilcox <willy@infradead.org>, Laurent Dufour <ldufour@linux.ibm.com>, David Rientjes <rientjes@google.com>, Axel Rasmussen <axelrasmussen@google.com>, Suren Baghdasaryan <surenb@google.com>, Vlastimil Babka <vbabka@suse.cz>, Rik van Riel <riel@surriel.com>, Peter Zijlstra <peterz@infradead.org>, Michel Lespinasse <walken.cr@gmail.com>, Liam Howlett <liam.howlett@oracle.com> Subject: [PATCH 92/94] mm: Return a bool from anon_vma_interval_tree_verify() Thread-Topic: [PATCH 92/94] mm: Return a bool from anon_vma_interval_tree_verify() Thread-Index: AQHXPERDF0w7lyOXCEuez/kdxsg2Kg== Date: Wed, 28 Apr 2021 15:36:31 +0000 Message-ID: <20210428153542.2814175-93-Liam.Howlett@Oracle.com> References: <20210428153542.2814175-1-Liam.Howlett@Oracle.com> In-Reply-To: <20210428153542.2814175-1-Liam.Howlett@Oracle.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-mailer: git-send-email 2.30.2 authentication-results: lists.infradead.org; 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Series |
Introducing the Maple Tree
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expand
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diff --git a/include/linux/mm.h b/include/linux/mm.h index e1f1ae32fa9d..6bf5369ad319 100644 --- a/include/linux/mm.h +++ b/include/linux/mm.h @@ -2526,7 +2526,7 @@ anon_vma_interval_tree_iter_first(struct rb_root_cached *root, struct anon_vma_chain *anon_vma_interval_tree_iter_next( struct anon_vma_chain *node, unsigned long start, unsigned long last); #ifdef CONFIG_DEBUG_VM_RB -void anon_vma_interval_tree_verify(struct anon_vma_chain *node); +bool anon_vma_interval_tree_verify(struct anon_vma_chain *node); #endif #define anon_vma_interval_tree_foreach(avc, root, start, last) \ diff --git a/mm/interval_tree.c b/mm/interval_tree.c index 32e390c42c53..5958e27d4381 100644 --- a/mm/interval_tree.c +++ b/mm/interval_tree.c @@ -103,9 +103,9 @@ anon_vma_interval_tree_iter_next(struct anon_vma_chain *node, } #ifdef CONFIG_DEBUG_VM_RB -void anon_vma_interval_tree_verify(struct anon_vma_chain *node) +bool anon_vma_interval_tree_verify(struct anon_vma_chain *node) { - WARN_ON_ONCE(node->cached_vma_start != avc_start_pgoff(node)); - WARN_ON_ONCE(node->cached_vma_last != avc_last_pgoff(node)); + return WARN_ON_ONCE(node->cached_vma_start != avc_start_pgoff(node)) || + WARN_ON_ONCE(node->cached_vma_last != avc_last_pgoff(node)); } #endif diff --git a/mm/mmap.c b/mm/mmap.c index c2baf006bcde..ae1ffe726405 100644 --- a/mm/mmap.c +++ b/mm/mmap.c @@ -326,8 +326,10 @@ static void validate_mm(struct mm_struct *mm) struct anon_vma_chain *avc; if (anon_vma) { anon_vma_lock_read(anon_vma); - list_for_each_entry(avc, &vma->anon_vma_chain, same_vma) - anon_vma_interval_tree_verify(avc); + list_for_each_entry(avc, &vma->anon_vma_chain, same_vma) { + if (anon_vma_interval_tree_verify(avc)) + pr_warn("Interval tree issue in %px", vma); + } anon_vma_unlock_read(anon_vma); } #endif @@ -339,6 +341,7 @@ static void validate_mm(struct mm_struct *mm) pr_emerg("map_count %d mas_for_each %d\n", mm->map_count, i); bug = 1; } + VM_BUG_ON_MM(bug, mm); }
Added to allow printing which vma has the issue Signed-off-by: Liam R. Howlett <Liam.Howlett@Oracle.com> --- include/linux/mm.h | 2 +- mm/interval_tree.c | 6 +++--- mm/mmap.c | 7 +++++-- 3 files changed, 9 insertions(+), 6 deletions(-)