netdev - Re: [PATCH v2 bpf-next] selftests/bpf: fix nanosleep for real this time

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Message-ID: <20200314003414.srdn7idaht7zlecb@kafai-mbp>
Date:   Fri, 13 Mar 2020 17:34:14 -0700
From:   Martin KaFai Lau <kafai@...com>
To:     Andrii Nakryiko <andriin@...com>
CC:     <bpf@...r.kernel.org>, <netdev@...r.kernel.org>, <ast@...com>,
        <daniel@...earbox.net>, <andrii.nakryiko@...il.com>,
        <kernel-team@...com>
Subject: Re: [PATCH v2 bpf-next] selftests/bpf: fix nanosleep for real this
 time

On Fri, Mar 13, 2020 at 05:27:43PM -0700, Andrii Nakryiko wrote:
> Amazingly, some libc implementations don't call __NR_nanosleep syscall from
> their nanosleep() APIs. Hammer it down with explicit syscall() call and never
> get back to it again. Also simplify code for timespec initialization.
> 
> I verified that nanosleep is called w/ printk and in exactly same Linux image
> that is used in Travis CI. So it should both sleep and call correct syscall.
> 
> v1->v2:
>   - math is too hard, fix usec -> nsec convertion (Martin);
>   - test_vmlinux has explicit nanosleep() call, convert that one as well.
Acked-by: Martin KaFai Lau <kafai@...com>