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From: Rusty Russell <rusty-mnsaURCQ41sdnm+yROfE0A@public.gmane.org>
To: Andrew Morton <akpm-de/tnXTf+JLsfHDXvbKv3WD2FQJk+8+b@public.gmane.org>
Cc: linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
	linux-api-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
	Mathieu Desnoyers
	<mathieu.desnoyers-vg+e7yoeK/dWk0Htik3J/w@public.gmane.org>
Subject: Re: [PATCH 0/3] sys_membarrier (x86, generic)
Date: Tue, 06 Oct 2015 09:51:39 +1030	[thread overview]
Message-ID: <87vbaknbp8.fsf@rustcorp.com.au> (raw)
In-Reply-To: <1436561912-24365-1-git-send-email-mathieu.desnoyers-vg+e7yoeK/dWk0Htik3J/w@public.gmane.org>

Mathieu Desnoyers <mathieu.desnoyers-vg+e7yoeK/dWk0Htik3J/w@public.gmane.org> writes:
> Hi Andrew,
>
> Here is a repost of sys_membarrier, rebased on top of Linus commit
> c4b5fd3fb2058b650447372472ad24e2a989f9f6 without any change since the
> last v19 post other that proceeding to further testing. When merging
> with other system calls, system call number conflicts should be quite
> straightforward to handle, there is nothing special there.

Hi Mathieu,

        Great to see this go in!  One small note: it talks about
threads, but membarrier as currently implemented would cover any shared
memory.  If you plan to optimize in future, that might not be the case:
we'd want an address argument for those cases?

Cheers,
Rusty.

WARNING: multiple messages have this Message-ID (diff)
From: Rusty Russell <rusty@ozlabs.org>
To: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>,
	Andrew Morton <akpm@linux-foundation.org>
Cc: linux-kernel@vger.kernel.org, linux-api@vger.kernel.org,
	Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Subject: Re: [PATCH 0/3] sys_membarrier (x86, generic)
Date: Tue, 06 Oct 2015 09:51:39 +1030	[thread overview]
Message-ID: <87vbaknbp8.fsf@rustcorp.com.au> (raw)
In-Reply-To: <1436561912-24365-1-git-send-email-mathieu.desnoyers@efficios.com>

Mathieu Desnoyers <mathieu.desnoyers@efficios.com> writes:
> Hi Andrew,
>
> Here is a repost of sys_membarrier, rebased on top of Linus commit
> c4b5fd3fb2058b650447372472ad24e2a989f9f6 without any change since the
> last v19 post other that proceeding to further testing. When merging
> with other system calls, system call number conflicts should be quite
> straightforward to handle, there is nothing special there.

Hi Mathieu,

        Great to see this go in!  One small note: it talks about
threads, but membarrier as currently implemented would cover any shared
memory.  If you plan to optimize in future, that might not be the case:
we'd want an address argument for those cases?

Cheers,
Rusty.

  parent reply	other threads:[~2015-10-05 23:21 UTC|newest]

Thread overview: 35+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-07-10 20:58 [PATCH 0/3] sys_membarrier (x86, generic) Mathieu Desnoyers
2015-07-10 20:58 ` [PATCH 1/3 v19] sys_membarrier(): system-wide memory barrier (generic, x86) Mathieu Desnoyers
2015-12-04 15:44   ` Michael Kerrisk (man-pages)
     [not found]     ` <5661B4E8.2070801-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2015-12-05  8:48       ` Mathieu Desnoyers
2015-12-05  8:48         ` Mathieu Desnoyers
     [not found]         ` <1635187109.213051.1449305303824.JavaMail.zimbra-vg+e7yoeK/dWk0Htik3J/w@public.gmane.org>
2015-12-11 18:05           ` Michael Kerrisk (man-pages)
2015-12-11 18:05             ` Michael Kerrisk (man-pages)
     [not found]             ` <566B107D.802-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2015-12-13 11:44               ` Mathieu Desnoyers
2015-12-13 11:44                 ` Mathieu Desnoyers
2015-07-10 20:58 ` [PATCH 2/3] selftests: add membarrier syscall test Mathieu Desnoyers
     [not found]   ` <1436561912-24365-3-git-send-email-mathieu.desnoyers-vg+e7yoeK/dWk0Htik3J/w@public.gmane.org>
2015-08-31  6:54     ` Michael Ellerman
2015-08-31  6:54       ` Michael Ellerman
     [not found]       ` <1441004040.5735.7.camel-Gsx/Oe8HsFggBc27wqDAHg@public.gmane.org>
2015-09-01 17:11         ` Mathieu Desnoyers
2015-09-01 17:11           ` Mathieu Desnoyers
     [not found]           ` <1071313434.33305.1441127478843.JavaMail.zimbra-vg+e7yoeK/dWk0Htik3J/w@public.gmane.org>
2015-09-01 18:32             ` Andy Lutomirski
2015-09-01 18:32               ` Andy Lutomirski
2015-09-03  9:33               ` Michael Ellerman
     [not found]                 ` <1441272839.26379.2.camel-Gsx/Oe8HsFggBc27wqDAHg@public.gmane.org>
2015-09-03 15:47                   ` Mathieu Desnoyers
2015-09-03 15:47                     ` Mathieu Desnoyers
     [not found]                     ` <1734164155.35899.1441295233847.JavaMail.zimbra-vg+e7yoeK/dWk0Htik3J/w@public.gmane.org>
2015-09-04  3:36                       ` Michael Ellerman
2015-09-04  3:36                         ` Michael Ellerman
2015-09-07 16:01                         ` Mathieu Desnoyers
     [not found]                           ` <2098747118.39146.1441641706942.JavaMail.zimbra-vg+e7yoeK/dWk0Htik3J/w@public.gmane.org>
2015-09-08  4:19                             ` Michael Ellerman
2015-09-08  4:19                               ` Michael Ellerman
     [not found]                               ` <1441685994.14597.7.camel-Gsx/Oe8HsFggBc27wqDAHg@public.gmane.org>
2015-09-08 14:02                                 ` Mathieu Desnoyers
2015-09-08 14:02                                   ` Mathieu Desnoyers
2015-09-03  9:24             ` Michael Ellerman
2015-09-03  9:24               ` Michael Ellerman
2015-07-10 20:58 ` [PATCH 3/3] selftests: enhance " Mathieu Desnoyers
     [not found] ` <1436561912-24365-1-git-send-email-mathieu.desnoyers-vg+e7yoeK/dWk0Htik3J/w@public.gmane.org>
2015-10-05 23:21   ` Rusty Russell [this message]
2015-10-05 23:21     ` [PATCH 0/3] sys_membarrier (x86, generic) Rusty Russell
     [not found]     ` <87vbaknbp8.fsf-8n+1lVoiYb80n/F98K4Iww@public.gmane.org>
2015-10-06  2:17       ` Mathieu Desnoyers
2015-10-06  2:17         ` Mathieu Desnoyers
     [not found]         ` <1840779213.18838.1444097856879.JavaMail.zimbra-vg+e7yoeK/dWk0Htik3J/w@public.gmane.org>
2015-10-08  6:22           ` Rusty Russell
2015-10-08  6:22             ` Rusty Russell

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