From: "Dr. David Alan Gilbert" <dgilbert@redhat•com>
To: Ingo Molnar <mingo@kernel•org>
Cc: Andrea Arcangeli <aarcange@redhat•com>,
Thomas Gleixner <tglx@linutronix•de>,
Stephen Rothwell <sfr@canb•auug.org.au>,
Andrew Morton <akpm@linux-foundation•org>,
Ingo Molnar <mingo@elte•hu>,
"\\\"H. Peter Anvin\\\"" <hpa@zytor•com>,
Peter Zijlstra <peterz@infradead•org>,
linux-next@vger•kernel.org, linux-api@vger•kernel.org,
linux-kernel@vger•kernel.org, Andy Lutomirski <luto@kernel•org>,
Eric B Munson <emunson@akamai•com>,
Pavel Emelyanov <xemul@parallels•com>,
Linus Torvalds <torvalds@linux-foundation•org>,
Peter Zijlstra <a.p.zijlstra@chello•nl>
Subject: Re: [PATCH] userfaultfd: register syscall numbers for x86 32bit and x86-64 64bit
Date: Fri, 31 Jul 2015 10:13:52 +0100 [thread overview]
Message-ID: <20150731091351.GC2272@work-vm> (raw)
In-Reply-To: <20150731083130.GA24624@gmail.com>
* Ingo Molnar (mingo@kernel•org) wrote:
>
> * Andrea Arcangeli <aarcange@redhat•com> wrote:
>
> > This registers the official numbers of the userfaultfd syscall for x86
> > 32bit and x86-64 64bit. This registration allows to ship kernels in
> > production using these two syscall numbers for userfaultfd.
> >
> > Acked-by: Pavel Emelyanov <xemul@parallels•com>
> > Signed-off-by: Andrea Arcangeli <aarcange@redhat•com>
> > ---
> > arch/x86/entry/syscalls/syscall_32.tbl | 1 +
> > arch/x86/entry/syscalls/syscall_64.tbl | 1 +
> > include/linux/syscalls.h | 1 +
> > kernel/sys_ni.c | 1 +
> > 4 files changed, 4 insertions(+)
>
> Hm, is there consensus on the upstream desirability of this sytem call?
I hope so:
a) It's generic enough that there's interest in using it in
a range of projects - there's nothing QEMU specific in it.
b) It's worked very well on the QEMU code that I wrote that uses it
for postcopy, and has been solid doing that for many months now.
c) I'm not aware of any suggestions for a different, generic solution
to solve the same set of problems.
d) It's got a good self test, that's survived heavy testing.
e) I think Andrea has addressed all previous comments on it.
Dave
>
> Thanks,
>
> Ingo
--
Dr. David Alan Gilbert / dgilbert@redhat•com / Manchester, UK
prev parent reply other threads:[~2015-07-31 9:13 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-07-30 15:34 [PATCH] userfaultfd: register syscall numbers for x86 32bit and x86-64 64bit Andrea Arcangeli
[not found] ` <1438270467-13324-1-git-send-email-aarcange-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2015-07-31 8:31 ` Ingo Molnar
2015-07-31 9:13 ` Dr. David Alan Gilbert [this message]
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