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Howlett" , "Uladzislau Rezki" , References: <20250924193643.4001-1-git@elijahs.space> <5f09b7f5-e7de-4333-8de5-322eb6d93aa9@suse.cz> <1f5ae3bd-db21-4042-b177-55464644ce2e@suse.cz> <57b01f59-f4b1-4f5f-bb63-fd8eea19b7ba@suse.cz> In-Reply-To: <57b01f59-f4b1-4f5f-bb63-fd8eea19b7ba@suse.cz> X-Rspamd-Queue-Id: 6A4B3140017 X-Stat-Signature: 65manwdreihoxg8t1ds9u4izzxykhny6 X-Rspam-User: X-Rspamd-Server: rspam01 X-HE-Tag: 1758913269-353731 X-HE-Meta: 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 q2giTagh GWwFjcHbQ0Ea865Tbk2wK9EjHVsHjkBNmrKmBRuZSLv+rV4/nH35J7hLdsw== 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 Sep 26, 2025 at 7:11 PM CEST, Vlastimil Babka wrote: > The rust wrapper side could do that so we don't have to add that check in > all kmem_cache_free() calls, maybe? > Also either way it could perhaps be difficult/expensive (memory barriers > etc) to properly handle a racing kmem_cache_free() and kmem_cache_destroy= () > in a way that ensures the cache is always being destroyed, and not have t= he > kmem_cache_destroy() observe the destroy was premature, while the racing > kmem_cache_free() doesn't yet observe that destroy was attempted, and not > try to remove it. Yeah, it's probably not much better than just using a reference count, but = more error prone.