netdev - Re: 2.6.24 BUG: soft lockup

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:	Fri, 28 Mar 2008 21:26:43 +0800
From:	Herbert Xu <herbert@...dor.apana.org.au>
To:	jamal <hadi@...erus.ca>
Cc:	"David S. Miller" <davem@...emloft.net>,
	Ingo Molnar <mingo@...e.hu>, Matheos.Worku@....COM,
	jesse.brandeburg@...el.com, jarkao2@...il.com,
	netdev@...r.kernel.org
Subject: Re: 2.6.24 BUG: soft lockup - CPU#X

On Fri, Mar 28, 2008 at 08:19:19AM -0400, jamal wrote:
>
> **** heres something that has not yet resolved in my mind (even for the
> NAPI case which was inherited from code that has been there forever).
> Theres probably a very simple answer ;->
> say we have two machines:
> one faster and we decide HZ = 1000 meaning 1ms for a jiffy; the other
> slower and we make HZ 100 i.e 10ms jiffy.
> Logically, shouldnt the slower machine allocate less time running the
> loop since it has less resources? in the above case it would spend 10
> times more. 

I agree that using jiffies is a pretty coarse approximation of
proper scheduling.  However, in the absence of a better solution
we have to live with it.

Perhaps running these out of process context is the correct
approach.

Thanks,
-- 
Visit Openswan at http://www.openswan.org/
Email: Herbert Xu ~{PmV>HI~} <herbert@...dor.apana.org.au>
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt
--
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html