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Message-ID: <6599ad830807031503s6c7f3d5fu3bf65d5a944f5c17@mail.gmail.com>
Date: Thu, 3 Jul 2008 15:03:05 -0700
From: "Paul Menage" <menage@...gle.com>
To: "Matt Helsley" <matthltc@...ibm.com>
Cc: "Dhaval Giani" <dhaval@...ux.vnet.ibm.com>,
"Andrea Righi" <righi.andrea@...il.com>,
"Li Zefan" <lizf@...fujitsu.com>,
lkml <linux-kernel@...r.kernel.org>,
"Sudhir Kumar" <skumar@...ux.vnet.ibm.com>,
containers@...ts.osdl.org,
"Andrew Morton" <akpm@...ux-foundation.org>
Subject: Re: Attaching PID 0 to a cgroup
On Thu, Jul 3, 2008 at 2:59 PM, Matt Helsley <matthltc@...ibm.com> wrote:
> ------------
> char buffer[16];
> int fd;
>
> fd = open("/some/cgroup/tasks", O_WRONLY);
>
> /*
> * These two writes produce the same effect: adding this process
> * to /some/cgroup.
> */
> if (the_slightly_shorter_way)
> write(fd, "0", 2);
> else {
> /* The slightly-less-short way */
> snprintf(buffer, 16, "%u", getpid());
> write(fd, buffer, strlen(buffer));
If it's a threaded application, then you'd need gettid() rather than
getpid() for the two to be equivalent.
Paul
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