linux-kernel - Re: [PATCH 1/2] arch: mark syscall number 435 reserved for clone3

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Message-ID: <20190716185310.GA12537@t470p.stackframe.org>
Date:   Tue, 16 Jul 2019 20:53:10 +0200
From:   Sven Schnelle <svens@...ckframe.org>
To:     Christian Brauner <christian@...uner.io>
Cc:     Christian Borntraeger <borntraeger@...ibm.com>,
        linux-kernel@...r.kernel.org, arnd@...db.de,
        linux-arch@...r.kernel.org, linux-alpha@...r.kernel.org,
        linux-ia64@...r.kernel.org, linux-m68k@...ts.linux-m68k.org,
        linux-mips@...r.kernel.org, linux-parisc@...r.kernel.org,
        linuxppc-dev@...ts.ozlabs.org, linux-s390@...r.kernel.org,
        linux-sh@...r.kernel.org, sparclinux@...r.kernel.org,
        Vasily Gorbik <gor@...ux.ibm.com>,
        Heiko Carstens <heiko.carstens@...ibm.com>, mpe@...erman.id.au
Subject: Re: [PATCH 1/2] arch: mark syscall number 435 reserved for clone3

Hi,

[Adding Helge to CC list]

On Tue, Jul 16, 2019 at 03:06:33PM +0200, Christian Brauner wrote:
> On Mon, Jul 15, 2019 at 03:56:04PM +0200, Christian Borntraeger wrote:
> > I think Vasily already has a clone3 patch for s390x with 435. 
> 
> A quick follow-up on this. Helge and Michael have asked whether there
> are any tests for clone3. Yes, there will be and I try to have them
> ready by the end of the this or next week for review. In the meantime I
> hope the following minimalistic test program that just verifies very
> very basic functionality (It's not pretty.) will help you test:
> [..]

On PA-RISC this seems to work fine with Helge's patch to wire up the
clone3 syscall.

root@...50:/# clonetest
Parent process received child's pid 84 as return value
Parent process received child's pidfd 3
Parent process received child's pid 84 as return argument
Child process with pid 84
root@...50:/# echo $?
0

Regards
Sven