linux-kernel - RE: [PATCH v2 1/2] KVM: x86: Use vector-hashing to deliver lowest-priority interrupts

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, 19 Jan 2016 04:44:20 +0000
From:	"Wu, Feng" <feng.wu@...el.com>
To:	Paolo Bonzini <pbonzini@...hat.com>,
	Radim Krcmár <rkrcmar@...hat.com>
CC:	"kvm@...r.kernel.org" <kvm@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"Wu, Feng" <feng.wu@...el.com>
Subject: RE: [PATCH v2 1/2] KVM: x86: Use vector-hashing to deliver
 lowest-priority interrupts



> -----Original Message-----
> From: Paolo Bonzini [mailto:pbonzini@...hat.com]
> Sent: Monday, January 18, 2016 6:42 PM
> To: Wu, Feng <feng.wu@...el.com>; Radim Krcmár <rkrcmar@...hat.com>
> Cc: kvm@...r.kernel.org; linux-kernel@...r.kernel.org
> Subject: Re: [PATCH v2 1/2] KVM: x86: Use vector-hashing to deliver lowest-
> priority interrupts
> 
> 
> 
> On 18/01/2016 06:19, Wu, Feng wrote:
> > However,
> > this will make the vector-hashing lowest-priority handling slightly different
> > compare to round-robin, since RR checks "!dst[i]" before injecting the
> > interrupts. What is your opinion about it? Thanks a lot!
> 
> I think Radim's suggestion is fine.  You can print an error (just once
> per guest) to dmesg if the result of the hashing computation corresponds
> to a disabled APIC.

Good idea, is there already a convenient way to do this in KVM?

Thanks,
Feng

> 
> Paolo