linux-kernel - Re: [RFC] Make need_resched() return true when rcu_urgent

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: <1531929711.3414.29.camel@infradead.org>
Date:   Wed, 18 Jul 2018 18:01:51 +0200
From:   David Woodhouse <dwmw2@...radead.org>
To:     paulmck@...ux.vnet.ibm.com
Cc:     Christian Borntraeger <borntraeger@...ibm.com>,
        Peter Zijlstra <peterz@...radead.org>, mhillenb@...zon.de,
        linux-kernel <linux-kernel@...r.kernel.org>,
        kvm <kvm@...r.kernel.org>
Subject: Re: [RFC] Make need_resched() return true when rcu_urgent_qs
 requested

On Wed, 2018-07-18 at 08:36 -0700, Paul E. McKenney wrote:
> And I finally did get some near misses from an earlier commit, so we
> should consider your patch to be officially off the hook.

Yay, I like it when it's not my fault. I'll redo it with the ifdef
CONFIG_NO_HZ_FULL.

What should it do for the !CONFIG_NO_HZ_FULL case? The existing call in
guest_enter_irqoff() clearly wasn't actually doing the right thing
anyway, hence the need for the need_resched() patch in $SUBJECT... so
should I just leave it doing nothing in guest_enter_irqoff()? 
Download attachment "smime.p7s" of type "application/x-pkcs7-signature" (5213 bytes)