linux-kernel - Re: [tip:sched/core] sched: cpuacct: Use bigger percpu counter batch values for stats counters

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, 12 May 2009 12:29:39 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	Balbir Singh <balbir@...ux.vnet.ibm.com>
Cc:	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>, mingo@...hat.com,
	hpa@...or.com, linux-kernel@...r.kernel.org,
	a.p.zijlstra@...llo.nl, schwidefsky@...ibm.com,
	balajirrao@...il.com, dhaval@...ux.vnet.ibm.com,
	bharata@...ux.vnet.ibm.com, tglx@...utronix.de,
	kamezawa.hiroyu@...fujitsu.com, linux-tip-commits@...r.kernel.org
Subject: Re: [tip:sched/core] sched: cpuacct: Use bigger percpu counter
	batch values for stats counters


* Balbir Singh <balbir@...ux.vnet.ibm.com> wrote:

> * KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com> [2009-05-12 19:13:42]:
> 
> > > > +#ifdef CONFIGCONFIG_SMP
> > > > +	cpuacct_batch = jiffies_to_cputime(percpu_counter_batch);
> > > > +#endif
> > > 
> > > Slow down and compile patches before sending them out.. please. That
> > > is a basic expectation if you expect it to be merged.
> > 
> > Unfortunately, this mistake pass test successfully ;)
> > it because cpuacct_batch=0 works even SMP.
> >
> 
> OK, BTW, using an #ifdef right in the middle of a function makes 
> the code harder to read, can't we use an inline function to 
> abstract out SMP?

or rather, to make cpuacct_batch have a sane value on UP too. (1? 
0?)

	Ingo
--
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/