linux-kernel - Re: futex timeout not working? (bisected)

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Message-ID: <alpine.DEB.2.11.1510161218400.3960@nanos>
Date:	Fri, 16 Oct 2015 12:21:51 +0200 (CEST)
From:	Thomas Gleixner <tglx@...utronix.de>
To:	Heiko Carstens <heiko.carstens@...ibm.com>
cc:	Stefan Liebler <stli@...ux.vnet.ibm.com>,
	Preeti U Murthy <preeti@...ux.vnet.ibm.com>,
	Peter Zijlstra <peterz@...radead.org>,
	linux-kernel@...r.kernel.org
Subject: Re: futex timeout not working? (bisected)

Heiko,

On Thu, 15 Oct 2015, Heiko Carstens wrote:
>   /* We wait for half a second.  */
>   ts.tv_nsec += 500000000;
>   if (ts.tv_nsec >= 1000000000)
>     {
>       ++ts.tv_sec;
>       ts.tv_nsec -= 1000000000;
>     }
> 
>   ret = syscall (__NR_futex, &futex_word, op, expected, ts, NULL, FUTEX_BITSET_MATCH_ANY);

If you actually hand in a pointer to 'ts' then the program works as
expected even with the commit in question applied.

Thanks,

	tglx



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