linux-kernel - Re: [RFC][PATCH] irq

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:	Thu, 24 Jun 2010 15:20:32 +0200
From:	Borislav Petkov <bp@...64.org>
To:	Andi Kleen <andi@...stfloor.org>
Cc:	Ingo Molnar <mingo@...e.hu>, Peter Zijlstra <peterz@...radead.org>,
	Huang Ying <ying.huang@...el.com>,
	"H. Peter Anvin" <hpa@...or.com>,
	Borislav Petkov <petkovbb@...glemail.com>,
	linux-kernel@...r.kernel.org, mauro@...e.hu
Subject: Re: [RFC][PATCH] irq_work

From: Andi Kleen <andi@...stfloor.org>
Date: Thu, Jun 24, 2010 at 03:02:34PM +0200

> On Thu, Jun 24, 2010 at 02:35:37PM +0200, Ingo Molnar wrote:
> > All of these solutions use the fact that perf events are a generic event 
> > framework. If there's any missing details somewhere then fixes/enhancements 
> > can be added - right now our in-kernel event consumers are simple. But the 
> > design is sound.
> 
> One immediate problem that comes to mind with the proposal 
> is that if the event is of a type that cannot be dropped (e.g. an error 
> that needs to be handled) then a shared ring buffer cannot guarantee that.

If its a critical error you do all the handling in the kernel and you
don't need task context at all, no? Can you give an example of such an
error?

-- 
Regards/Gruss,
Boris.

Advanced Micro Devices GmbH
Einsteinring 24, 85609 Dornach
General Managers: Alberto Bozzo, Andrew Bowd
Registration: Dornach, Gemeinde Aschheim, Landkreis Muenchen
Registergericht Muenchen, HRB Nr. 43632
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/