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Howlett" , Andrew Morton , Vlastimil Babka , Matthew Wilcox , maple-tree@lists.infradead.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org, Sidhartha Kumar Subject: Re: [PATCH v2 1/3] testing/radix-tree/maple: Hack around kfree_rcu not existing Message-ID: References: <20250812162124.59417-1-pfalcato@suse.de> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-Rspamd-Server: rspam12 X-Rspamd-Queue-Id: 3E98B180006 X-Stat-Signature: 11qhyyeo8oxxc9ukmh3eqkmf58jjz6he X-Rspam-User: X-HE-Tag: 1755277610-629559 X-HE-Meta: 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 lAZDRfjB jKzuWNbHS21WVuGcue5zd0TbeGA== 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 Fri, Aug 15, 2025 at 11:11:30AM -0400, Liam R. Howlett wrote: > * Pedro Falcato [250812 12:21]: > > liburcu doesn't have kfree_rcu (or anything similar). Despite that, we > > can hack around it in a trivial fashion, by adding a wrapper. > > > > This wrapper only works for maple_nodes, and not anything else (due to > > us not being able to know rcu_head offsets in any way), and thus we take > > advantage of the type checking to avoid future silent breakage. > > > > Reviewed-by: Sidhartha Kumar > > Signed-off-by: Pedro Falcato > > > Andrew, > > Please drop this patch set. We will have it go through Vlastimil's tree > to avoid conflicts with other work and to maintain the userspace testing > in mm-new while that happens. In case this helps, Andrew, it's maple_tree-use-kfree_rcu-in-ma_free_rcu.patch and testing-radix-tree-maple-hack-around-kfree_rcu-not-existing.patch in your series file. (Yes, I should have used a cover letter here, it would've made it easier to manage, my mistake) -- Pedro