lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
Open Source and information security mailing list archives
| ||
|
Message-ID: <ZDbO3haK/1+7xdRC@infradead.org> Date: Wed, 12 Apr 2023 08:31:42 -0700 From: Christoph Hellwig <hch@...radead.org> To: David Howells <dhowells@...hat.com> Cc: netdev@...r.kernel.org, "David S. Miller" <davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>, Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>, Willem de Bruijn <willemdebruijn.kernel@...il.com>, David Ahern <dsahern@...nel.org>, Matthew Wilcox <willy@...radead.org>, Al Viro <viro@...iv.linux.org.uk>, Christoph Hellwig <hch@...radead.org>, Jens Axboe <axboe@...nel.dk>, Jeff Layton <jlayton@...nel.org>, Christian Brauner <brauner@...nel.org>, Chuck Lever III <chuck.lever@...cle.com>, Linus Torvalds <torvalds@...ux-foundation.org>, linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org, linux-mm@...ck.org, Jeroen de Borst <jeroendb@...gle.com>, Catherine Sullivan <csully@...gle.com>, Shailend Chand <shailend@...gle.com>, Felix Fietkau <nbd@....name>, John Crispin <john@...ozen.org>, Sean Wang <sean.wang@...iatek.com>, Mark Lee <Mark-MC.Lee@...iatek.com>, Lorenzo Bianconi <lorenzo@...nel.org>, Matthias Brugger <matthias.bgg@...il.com>, AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>, Keith Busch <kbusch@...nel.org>, Jens Axboe <axboe@...com>, Christoph Hellwig <hch@....de>, Sagi Grimberg <sagi@...mberg.me>, Chaitanya Kulkarni <kch@...dia.com>, Andrew Morton <akpm@...ux-foundation.org>, linux-arm-kernel@...ts.infradead.org, linux-mediatek@...ts.infradead.org, linux-nvme@...ts.infradead.org Subject: Re: [PATCH net-next v6 04/18] mm: Make the page_frag_cache allocator use per-cpu On Tue, Apr 11, 2023 at 05:08:48PM +0100, David Howells wrote: > Make the page_frag_cache allocator have a separate allocation bucket for > each cpu to avoid racing. This means that no lock is required, other than > preempt disablement, to allocate from it, though if a softirq wants to > access it, then softirq disablement will need to be added. Can you show any performance numbers? > Make the NVMe, mediatek and GVE drivers pass in NULL to page_frag_cache() > and use the default allocation buckets rather than defining their own. Let me ask a third time as I've not got an answer the last two times: why are these callers treated different from the others?
Powered by blists - more mailing lists