linux-kernel - Re: [PATCH v2] block: respect virtual boundary mask in bvecs

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

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <756f1630-f875-4a7c-26cf-9cce7b850ca1@kernel.dk>
Date:   Wed, 7 Nov 2018 13:05:01 -0700
From:   Jens Axboe <axboe@...nel.dk>
To:     Johannes Thumshirn <jthumshirn@...e.de>
Cc:     Linux Block Layer Mailinglist <linux-block@...r.kernel.org>,
        Linux Kernel Mailinglist <linux-kernel@...r.kernel.org>,
        Jan Kara <jack@...e.cz>, Sagi Grimberg <sagi@...mberg.me>,
        Bart Van Assche <bvanassche@....org>,
        Ming Lei <ming.lei@...hat.com>
Subject: Re: [PATCH v2] block: respect virtual boundary mask in bvecs

On 11/7/18 6:58 AM, Johannes Thumshirn wrote:
> With drivers that are settting a virtual boundary constrain, we are
> seeing a lot of bio splitting and smaller I/Os being submitted to the
> driver.
> 
> This happens because the bio gap detection code does not account cases
> where PAGE_SIZE - 1 is bigger than queue_virt_boundary() and thus will
> split the bio unnecessarily.

Thanks, applied.

-- 
Jens Axboe