linux-kernel - Re: [RFC] proc: change /proc/stat show

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: <alpine.DEB.2.10.1503171601230.11185@chino.kir.corp.google.com>
Date:	Tue, 17 Mar 2015 16:02:02 -0700 (PDT)
From:	David Rientjes <rientjes@...gle.com>
To:	"Wang, Yalin" <Yalin.Wang@...ymobile.com>
cc:	"akpm@...ux-foundation.org" <akpm@...ux-foundation.org>,
	"heiko.carstens@...ibm.com" <heiko.carstens@...ibm.com>,
	"tglx@...utronix.de" <tglx@...utronix.de>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [RFC] proc: change /proc/stat show

On Tue, 17 Mar 2015, Wang, Yalin wrote:

> diff --git a/fs/proc/stat.c b/fs/proc/stat.c
> index 510413eb..60b39e2 100644
> --- a/fs/proc/stat.c
> +++ b/fs/proc/stat.c
> @@ -130,7 +130,7 @@ static int show_stat(struct seq_file *p, void *v)
>  	seq_put_decimal_ull(p, ' ', cputime64_to_clock_t(guest_nice));
>  	seq_putc(p, '\n');
>  
> -	for_each_online_cpu(i) {
> +	for_each_present_cpu(i) {
>  		/* Copy values here to work around gcc-2.95.3, gcc-2.96 */
>  		user = kcpustat_cpu(i).cpustat[CPUTIME_USER];
>  		nice = kcpustat_cpu(i).cpustat[CPUTIME_NICE];
> @@ -153,6 +153,7 @@ static int show_stat(struct seq_file *p, void *v)
>  		seq_put_decimal_ull(p, ' ', cputime64_to_clock_t(steal));
>  		seq_put_decimal_ull(p, ' ', cputime64_to_clock_t(guest));
>  		seq_put_decimal_ull(p, ' ', cputime64_to_clock_t(guest_nice));
> +		seq_printf(p, " %d", cpu_online(i)? 1 : 0);
>  		seq_putc(p, '\n');
>  	}
>  	seq_printf(p, "intr %llu", (unsigned long long)sum);

Makes sense, but why do we need to output the cpu state as part of 
/proc/stat?  This information should already be available elsewhere.
--
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/