Messages in this thread | | | Date | Thu, 22 Aug 2019 16:03:44 -0700 | From | Andrew Morton <> | Subject | Re: [PATCH v2 0/4] debug_pagealloc improvements through page_owner |
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On Tue, 20 Aug 2019 15:18:24 +0200 Vlastimil Babka <vbabka@suse.cz> wrote:
> v2: also fix THP split handling (added Patch 1) per Kirill > > The debug_pagealloc functionality serves a similar purpose on the page > allocator level that slub_debug does on the kmalloc level, which is to detect > bad users. One notable feature that slub_debug has is storing stack traces of > who last allocated and freed the object. On page level we track allocations via > page_owner, but that info is discarded when freeing, and we don't track freeing > at all. This series improves those aspects. With both debug_pagealloc and > page_owner enabled, we can then get bug reports such as the example in Patch 4. > > SLUB debug tracking additionaly stores cpu, pid and timestamp. This could be > added later, if deemed useful enough to justify the additional page_ext > structure size.
Thanks. I split [1/1] out of the series as a bugfix and turned this into a three-patch series.
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