From: Oleg Nesterov <oleg-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
To: Ulrich Drepper <drepper-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
Cc: KOSAKI Motohiro
<kosaki.motohiro-+CUm20s59erQFUHtdCDX3A@public.gmane.org>,
Christoph Hellwig <hch-wEGCiKHe2LqWVfeAwA7xHQ@public.gmane.org>,
akpm-de/tnXTf+JLsfHDXvbKv3WD2FQJk+8+b@public.gmane.org,
torvalds-de/tnXTf+JLsfHDXvbKv3WD2FQJk+8+b@public.gmane.org,
bdonlan-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org,
hpa-YMNOUZJC4hwAvxtiuMwx3w@public.gmane.org,
linux-api-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
mingo-X9Un+BFzKDI@public.gmane.org,
tss-X3B1VOXEql0@public.gmane.org,
xiyou.wangcong-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org
Subject: Re: [patch 050/160] prctl: add PR_SET_PROCTITLE_AREA option for prctl()
Date: Tue, 9 Mar 2010 23:17:04 +0100 [thread overview]
Message-ID: <20100309221704.GA1401@redhat.com> (raw)
In-Reply-To: <4B95DAF3.5050605-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
On 03/08, Ulrich Drepper wrote:
>
> On 03/08/2010 08:44 PM, KOSAKI Motohiro wrote:
> > I don't think this is big matter. Does using syscall have any benefit?
> > I don't have strong mention. merely, Timo's original proposal used
> > prctl.
>
> Syscalls don't have to go through the multiplexer in grab bag calls like
> prctl, ioctl, etc. And they are more reliably to test for at runtime.
> An ENOSYS error is unmistakably clear. An EINVAL error, as returned by
> prctl when encountering an unknown function argument, could also mean
> the argument isn't valid. That's a common problem of most multiplexer
> syscalls and a reason why they should be avoided.
Agreed, but this applies to any prtcl() request. And we already have
PR_GET_NAME/PR_SET_NAME which is very close to PR_SET_PROCTITLE_AREA.
So, do you really think that this particular case deserves the new
syscall?
Oleg.
next prev parent reply other threads:[~2010-03-09 22:17 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-03-05 21:42 [patch 050/160] prctl: add PR_SET_PROCTITLE_AREA option for prctl() akpm-de/tnXTf+JLsfHDXvbKv3WD2FQJk+8+b
[not found] ` <201003052142.o25Lgbpg029522-AB4EexQrvXRQetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org>
2010-03-06 19:05 ` Linus Torvalds
[not found] ` <alpine.LFD.2.00.1003061100170.4530-bi+AKbBUZKY6gyzm1THtWbp2dZbC/Bob@public.gmane.org>
2010-03-07 19:28 ` Oleg Nesterov
[not found] ` <20100307192826.GA18616-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2010-03-07 20:24 ` Bryan Donlan
[not found] ` <3e8340491003071224o5ea1c01cl73132e7c2cc6046f-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2010-03-08 12:56 ` Oleg Nesterov
2010-03-09 5:14 ` KOSAKI Motohiro
[not found] ` <20100306095705.GA26221@infradead.org>
[not found] ` <20100306095705.GA26221-wEGCiKHe2LqWVfeAwA7xHQ@public.gmane.org>
2010-03-09 4:44 ` KOSAKI Motohiro
[not found] ` <20100309134105.7CDB.A69D9226-+CUm20s59erQFUHtdCDX3A@public.gmane.org>
2010-03-09 5:21 ` Ulrich Drepper
[not found] ` <4B95DAF3.5050605-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2010-03-09 22:17 ` Oleg Nesterov [this message]
[not found] ` <20100309221704.GA1401-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2010-03-09 22:33 ` Ulrich Drepper
[not found] ` <4B96CCB8.9040507-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2010-03-10 1:42 ` KOSAKI Motohiro
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