linux-kernel - Re: (subset) [PATCH v1 0/2] io

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Date:   Wed, 16 Nov 2022 20:31:32 +0000
From:   Pavel Begunkov <asml.silence@...il.com>
To:     Stefan Metzmacher <metze@...ba.org>, Jens Axboe <axboe@...nel.dk>,
        Ammar Faizi <ammarfaizi2@...weeb.org>
Cc:     GNU/Weeb Mailing List <gwml@...r.gnuweeb.org>,
        io-uring Mailing List <io-uring@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Stephen Rothwell <sfr@...b.auug.org.au>
Subject: Re: (subset) [PATCH v1 0/2] io_uring uapi updates

On 11/16/22 20:03, Stefan Metzmacher wrote:
> Am 16.11.22 um 20:46 schrieb Jens Axboe:
>> On 11/16/22 7:22 AM, Stefan Metzmacher wrote:
>>> Am 16.11.22 um 14:50 schrieb Jens Axboe:
>>>> On 11/15/22 11:34 PM, Ammar Faizi wrote:
>>>>> On 11/16/22 6:14 AM, Jens Axboe wrote:
>>>>>> On Wed, 16 Nov 2022 04:29:51 +0700, Ammar Faizi wrote:
>>>>>>> From: Ammar Faizi <ammarfaizi2@...weeb.org>
>>>>>>>
>>>>>>> Hi Jens,
>>>>>>>
>>>>>>> io_uring uapi updates:
>>>>>>>
>>>>>>> 1) Don't force linux/time_types.h for userspace. Linux's io_uring.h is
>>>>>>> ???? synced 1:1 into liburing's io_uring.h. liburing has a configure
>>>>>>> ???? check to detect the need for linux/time_types.h (Stefan).
>>>>>>>
>>>>>>> [...]
>>>>>>
>>>>>> Applied, thanks!
>>>>>>
>>>>>> [1/2] io_uring: uapi: Don't force linux/time_types.h for userspace
>>>>>> ??????? commit: 958bfdd734b6074ba88ee3abc69d0053e26b7b9c
>>>>>
>>>>> Jens, please drop this commit. It breaks the build:
>>>>
>>>> Dropped - please actually build your patches, or make it clear that
>>>> they were not built at all. None of these 2 patches were any good.
>>>
>>> Is it tools/testing/selftests/net/io_uring_zerocopy_tx.c that doesn't build?
>>
>> Honestly not sure, but saw a few reports come in. Here's the one from
>> linux-next:
>>
>> https://lore.kernel.org/all/20221116123556.79a7bbd8@canb.auug.org.au/
> 
> Yes, but the output is pretty useless as it doesn't show what
> .c file and what command is failing.
> 
>>> and needs a '#define HAVE_LINUX_TIME_TYPES_H 1'
> 
> Just guessing, but adding this into the commit has a chance to work...
> 
> --- a/tools/testing/selftests/net/io_uring_zerocopy_tx.c
> +++ b/tools/testing/selftests/net/io_uring_zerocopy_tx.c
> @@ -15,6 +15,7 @@
>   #include <arpa/inet.h>
>   #include <linux/errqueue.h>
>   #include <linux/if_packet.h>
> +#define HAVE_LINUX_TIME_TYPES_H 1
>   #include <linux/io_uring.h>
>   #include <linux/ipv6.h>
>   #include <linux/socket.h>
> 
>>> BTW, the original commit I posted was here:
>>> https://lore.kernel.org/io-uring/c7782923deeb4016f2ac2334bc558921e8d91a67.1666605446.git.metze@samba.org/
>>>
>>> What's the magic to compile tools/testing/selftests/net/io_uring_zerocopy_tx.c ?
>>
>> Some variant of make kselftests-foo?
>>
>>> My naive tries both fail (even without my patch):
>>
>> Mine does too, in various other tests. Stephen?
> 
> Pavel, as you created that file, do you remember how you build it?

make headers_install
make -C tools/testing/selftests/net/


IIRC, it uses system uapi headers and apparently yours don't have
IORING_CQE_F_NOTIF, etc. And I don't think it uses the right Makefile,
so -C executes it from the selftest/net folder.

-- 
Pavel Begunkov