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Received: from willy by casper.infradead.org with local (Exim 4.97.1 #2 (Red Hat Linux)) id 1sc8bN-00000009I3i-16Kl; Thu, 08 Aug 2024 19:15:09 +0000 Date: Thu, 8 Aug 2024 20:15:09 +0100 From: Matthew Wilcox To: Sidhartha Kumar Cc: linux-kernel@vger.kernel.org, maple-tree@lists.infradead.org, linux-mm@kvack.org, akpm@linux-foundation.org, liam.howlett@oracle.com Subject: Re: [PATCH 1/2] maple_tree: add test to replicate low memory race conditions Message-ID: References: <20240808163000.25053-1-sidhartha.kumar@oracle.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20240808163000.25053-1-sidhartha.kumar@oracle.com> X-Stat-Signature: gejyd5s7o4uet6rhnn3s8ej3wak8m1cr X-Rspamd-Queue-Id: 9EA4240014 X-Rspam-User: X-Rspamd-Server: rspam08 X-HE-Tag: 1723144512-864585 X-HE-Meta: U2FsdGVkX1/4EYDBjGQ8EzpWRRd7OKt3er7Xb2hzIK/x/P4hVHAfJo+e/GRuMCp/uglwQTBixVioUoi6OPJKIaofa9+3tjXOo+BOqzhUduOC3G0gNSZEbIYDM1TAfPUy7ODIknJ+/P+wj/POWHhGV/44keMZfJLAUIDuWF+evYNoH6ztzcllzU6fKDDPD8SEargLq+Vktn4+qlH/C+02b2LICthMOG+OIyd2M5XG2Ruk/guE5G5P9QLf65WnEIKNqSf27Gnr95ZJPNDGdUhbXSe9HTLk0cINwfQxHwNWhp+t1jpybE9+iMTdySa1kdt1UepA5t3K6xJXEZQYfro/ZLKUH/aTSMTHU7kuX17WjEbdbhVbVYtSj/cUEKFXQY6KSq4EU1PtH9vPLWQWtOgqTUx1IlKslKuy9UK621rlU46jRAjEF+Xu8Bedi3qhtpbMvK/8PNY77i7IheDbwqr47QKQld0UT37l+fJ6OFXz7SNOKfQsXqaby7WpJdpfXeG/oYr4afCIvkQmenUw4vfEPZJ28atOM9rTSRXCVDnI1aomYQgFmeRoqhkpzHP9ZYLyjuuztPQl0hcqbXnKh/QDm/PclWN2ganlNYOasgvTM7dmDVMs26DxQ02esRBEYd3UyAcAsYmH6u3krr36uboOIONgLcOVXfRo/CDEvaOTDCFGSFWWIRghbSbMl2QwO/mn5J+q8/pbR/ndqkiuixxA0GlGmmsr30nyXYheyS87I5Abc7gLRE8pMVg9OlNEn3Qp9hjFdLbxd5mN5Pwi8/UE50g34QbZllBk9dKOn81lbpo2jRlV686bsXCYvD9jCdHt8GjTn/mvaSh4UnbUWo9TivAM3Xnx3mSxb5D5wXI75G6a4O8iC4yPwsStHZm8eTGKfyPIvX+v8WCtx3UJN3yXM4KqoWFmOj0+/LyaIo2/y5av/wHXKWFmrqJriPeiDOS6pZ+d7xL3o7/Q3CCQbfh OO2S53GJ JvkOi3zr1pTWquGMv+V8CPO8sR1upHOgvrMCV+cfMOEApQBVKurYTQbbCse46/1OxTG/HckutMh5gkWwzCJTJsI0W/Wddi9yVnjmNEOhiC88ytBp+8XWKx07POI1rWIRS54GKjKVbdNgvM11OvDrdmdyGElKQ09YhOYKtTfJpqBx4+tqkk3VeCtSxppQg377KpHZsmR/dJSBJy4GwYvWAIXx5/OaUEGqy3TeVEPhCaGbwMur1EkmWVQeaW0YVm7MTJb4K X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On Thu, Aug 08, 2024 at 12:29:59PM -0400, Sidhartha Kumar wrote: > diff --git a/lib/maple_tree.c b/lib/maple_tree.c > index aa3a5df15b8e..65fba37ef999 100644 > --- a/lib/maple_tree.c > +++ b/lib/maple_tree.c > @@ -6997,6 +6997,18 @@ void mt_set_non_kernel(unsigned int val) > kmem_cache_set_non_kernel(maple_node_cache, val); > } > > +extern void kmem_cache_set_callback(struct kmem_cache *cachep, void (*callback)(void *)); > +void mt_set_callback(void (*callback)(void *)) > +{ > + kmem_cache_set_callback(maple_node_cache, callback); > +} > + > +extern void kmem_cache_set_private(struct kmem_cache *cachep, void *private); > +void mt_set_private(void *private) > +{ > + kmem_cache_set_private(maple_node_cache, private); > +} > + > extern unsigned long kmem_cache_get_alloc(struct kmem_cache *); > unsigned long mt_get_alloc_size(void) > { This should surely not be in lib/maple_tree.c ...