From: Andy Lutomirski <luto@amacapital.net>
To: Andy Lutomirski <luto@kernel.org>
Cc: X86 ML <x86@kernel.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
Borislav Petkov <bp@alien8.de>,
"musl@lists.openwall.com" <musl@lists.openwall.com>
Subject: Re: [RFC PATCH] x86/vdso/32: Add AT_SYSINFO cancellation helpers
Date: Sat, 12 Mar 2016 10:13:39 -0800 [thread overview]
Message-ID: <CALCETrVMp6twHwdTrX3WAzEL+7qi1Aha5BxVz++V_Yc2AP8pBg@mail.gmail.com> (raw)
In-Reply-To: <CALCETrXQH+BgEgfr=a3ZEPkZgjRcck2qRf1Xbw=Z_HEpS89scg@mail.gmail.com>
On Wed, Mar 9, 2016 at 1:19 PM, Andy Lutomirski <luto@amacapital.net> wrote:
> On Wed, Mar 9, 2016 at 9:58 AM, Andy Lutomirski <luto@amacapital.net> wrote:
>> On Tue, Mar 8, 2016 at 5:24 PM, Andy Lutomirski <luto@kernel.org> wrote:
>>> musl implements system call cancellation in an unusual but clever way.
>>> When a thread issues a cancellable syscall, musl issues the syscall
>>> through a special thunk that looks roughly like this:
>>>
>>
>> FWIW, this patch fails disastrously on 64-bit kernels. I fixed it,
>> but it needs kbuild changes. I'll send those out to the maintainers.
>
> This version should be okay:
>
> https://git.kernel.org/cgit/linux/kernel/git/luto/linux.git/commit/?h=x86/vdso&id=fed6d35d3941bc53896ab80b5c8d68d54cc00347
>
> You'll need the parent, too, if you want to test. I'm going to give
> the 0day bot a good long chew, since the parent change is a little bit
> scary.
Nope, that version was also not okay. But the version currently in
that branch has survived the kbuild bot for a while now.
Yikes our build process for usermode code sucks.
--Andy
prev parent reply other threads:[~2016-03-12 18:14 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-03-09 1:24 [RFC PATCH] x86/vdso/32: Add AT_SYSINFO cancellation helpers Andy Lutomirski
2016-03-09 8:56 ` Ingo Molnar
2016-03-09 11:34 ` [musl] " Szabolcs Nagy
2016-03-09 11:40 ` Szabolcs Nagy
2016-03-09 19:47 ` Linus Torvalds
2016-03-09 20:57 ` Andy Lutomirski
2016-03-09 21:26 ` Linus Torvalds
2016-03-10 10:57 ` Ingo Molnar
2016-03-10 3:34 ` Rich Felker
2016-03-10 11:16 ` Ingo Molnar
2016-03-10 16:41 ` Rich Felker
2016-03-10 18:03 ` Ingo Molnar
2016-03-10 23:28 ` Rich Felker
2016-03-11 0:18 ` Szabolcs Nagy
2016-03-11 0:48 ` Rich Felker
2016-03-11 1:14 ` Andy Lutomirski
2016-03-11 1:39 ` Szabolcs Nagy
2016-03-11 1:49 ` Szabolcs Nagy
2016-03-11 1:55 ` Rich Felker
2016-03-11 9:33 ` Ingo Molnar
2016-03-11 11:39 ` Szabolcs Nagy
2016-03-11 19:27 ` Linus Torvalds
2016-03-11 19:30 ` Andy Lutomirski
2016-03-11 19:39 ` Linus Torvalds
2016-03-11 19:44 ` Linus Torvalds
2016-03-12 17:05 ` Ingo Molnar
2016-03-12 18:10 ` Rich Felker
2016-03-12 17:00 ` Ingo Molnar
2016-03-12 18:05 ` Rich Felker
2016-03-12 18:48 ` Ingo Molnar
2016-03-12 19:08 ` Rich Felker
2016-03-12 17:08 ` Ingo Molnar
2016-03-09 17:58 ` Andy Lutomirski
2016-03-09 21:19 ` Andy Lutomirski
2016-03-12 18:13 ` Andy Lutomirski [this message]
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