From: Ulrich Drepper <drepper-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
To: KOSAKI Motohiro
<kosaki.motohiro-+CUm20s59erQFUHtdCDX3A@public.gmane.org>
Cc: 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,
oleg-H+wXaHxf7aLQT0dZR+AlfA@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: Mon, 08 Mar 2010 21:21:55 -0800 [thread overview]
Message-ID: <4B95DAF3.5050605@redhat.com> (raw)
In-Reply-To: <20100309134105.7CDB.A69D9226-+CUm20s59erQFUHtdCDX3A@public.gmane.org>
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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.
- --
➧ Ulrich Drepper ➧ Red Hat, Inc. ➧ 444 Castro St ➧ Mountain View, CA ❖
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next prev parent reply other threads:[~2010-03-09 5:21 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 [this message]
[not found] ` <4B95DAF3.5050605-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2010-03-09 22:17 ` Oleg Nesterov
[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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