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
| ||
|
Date: Sun, 28 Jun 2020 18:31:43 -0700 From: Keith Busch <kbusch@...nel.org> To: Baolin Wang <baolin.wang@...ux.alibaba.com> Cc: axboe@...com, hch@....de, sagi@...mberg.me, baolin.wang7@...il.com, linux-nvme@...ts.infradead.org, linux-kernel@...r.kernel.org Subject: Re: [RFC PATCH] nvme-pci: Move the sg table allocation/free into init/exit_request On Sun, Jun 28, 2020 at 06:34:46PM +0800, Baolin Wang wrote: > Move the sg table allocation and free into the init_request() and > exit_request(), instead of allocating sg table when queuing requests, > which can benefit the IO performance. If you want to pre-allocate something per-request, you can add the size to the tagset's cmd_size. But this is adding almost 4k per request. Considering how many requests we try to allocate, that's a bit too large to count on being available or sequestor for this driver.
Powered by blists - more mailing lists