linux-kernel - Re: [PATCH] epoll: avoid calling ep_call_nested() from ep_poll

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]

Date:   Tue, 31 Oct 2017 10:14:47 -0400
From:   Jason Baron <jbaron@...mai.com>
To:     Davidlohr Bueso <dave@...olabs.net>
Cc:     akpm@...ux-foundation.org, linux-kernel@...r.kernel.org,
        linux-fsdevel@...r.kernel.org,
        Alexander Viro <viro@...iv.linux.org.uk>,
        Salman Qazi <sqazi@...gle.com>
Subject: Re: [PATCH] epoll: avoid calling ep_call_nested() from
 ep_poll_safewake()



On 10/28/2017 10:05 AM, Davidlohr Bueso wrote:
> On Wed, 18 Oct 2017, Jason Baron wrote:
> 
>> http://lkml.iu.edu/hypermail//linux/kernel/1501.1/05905.html
>>
>> We can work through these ideas or others...
> 
> So, unsurprisingly, I got some _really_ good results on the epoll_wait()
> benchmark by removing the readywalk list altogether -- something like
> 4000% in some cases. It's also survived more testing, although I'm still
> waiting for customer confirmation on his real workload, which helps
> further test the changes (along with this patch to move the safewake
> list to debug).
> 
> Could you please resend patch 1 in the series above?
> 

Hi,

I've resent patch 1 with some cleanups now. Thanks for the testing feedback.

Thanks,

-Jason