From: Arnd Bergmann <arnd@kernel.org>
To: Eric Gao <eric.tech@foxmail.com>
Cc: "catalin.marinas" <catalin.marinas@arm.com>,
will <will@kernel.org>, geert <geert@linux-m68k.org>,
monstr <monstr@monstr.eu>, tsbogend <tsbogend@alpha.franken.de>,
James Bottomley <James.Bottomley@hansenpartnership.com>,
deller <deller@gmx.de>, mpe <mpe@ellerman.id.au>,
hca <hca@linux.ibm.com>, gor <gor@linux.ibm.com>,
borntraeger <borntraeger@de.ibm.com>,
ysato <ysato@users.sourceforge.jp>, dalias <dalias@libc.org>,
davem <davem@davemloft.net>, luto <luto@kernel.org>,
tglx <tglx@linutronix.de>, mingo <mingo@redhat.com>,
bp <bp@alien8.de>, chris <chris@zankel.net>,
jcmvbkbc <jcmvbkbc@gmail.com>, arnd <arnd@arndb.de>,
benh <benh@kernel.crashing.org>, paulus <paulus@samba.org>,
hpa <hpa@zytor.com>, linux-alpha <linux-alpha@vger.kernel.org>,
linux-kernel <linux-kernel@vger.kernel.org>,
linux-arm-kernel <linux-arm-kernel@lists.infradead.org>,
linux-api <linux-api@vger.kernel.org>,
linux-arch <linux-arch@vger.kernel.org>
Subject: Re: [PATCH] ipc/msg: add msgsnd_timed and msgrcv_timed syscall for system V message queue
Date: Sun, 28 Feb 2021 20:49:34 +0100 [thread overview]
Message-ID: <CAK8P3a2o=GfLCBiQh=fuRor3yKd0h7zKDZoqj8bsReoQNEA1eg@mail.gmail.com> (raw)
In-Reply-To: <tencent_2B7E37BD494059DF7D6845F641769CD28209@qq.com>
On Sun, Feb 28, 2021 at 5:16 PM Eric Gao <eric.tech@foxmail.com> wrote:
>
> > Is there something that mq_timedsend/mq_timedreceive cannot do that
> > you need? Would it be possible to add that feature to the posix message
> > queues instead?
>
> the system v message queue have a mtype parameter both in msgsnd and msgrcv which can be
> used to implement message routing(mtype as the target id. For example, I filling the target thread
> id that waiting message). It's the most important.
>
> but mq_timedsend/mq_timedreceive in posix message queue don't have this feature.
I'm not sure I'm following here. With posix message queues, can't you just open
one queue per target thread? That would seem simpler and more efficient besides
also allowing the timeout.
Arnd
next prev parent reply other threads:[~2021-02-28 19:50 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <tencent_2CB9BD7D4063DE3F6845F79176B2D29A7E09@qq.com>
2021-02-28 15:38 ` [PATCH] ipc/msg: add msgsnd_timed and msgrcv_timed syscall for system V message queue Arnd Bergmann
[not found] ` <tencent_2B7E37BD494059DF7D6845F641769CD28209@qq.com>
2021-02-28 19:49 ` Arnd Bergmann [this message]
[not found] <tencent_30362DDFFEE04E6CDACB6F803734A8DC7B06@qq.com>
2021-02-27 12:29 ` Arnd Bergmann
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