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From: Ulrich Drepper <drepper@redhat.com>
To: Chris Friesen <cfriesen@nortel.com>
Cc: Andreas Schwab <schwab@suse.de>,
	David Miller <davem@davemloft.net>,
	paulus@samba.org, akpm@linux-foundation.org, lkml@davidb.org,
	linux-kernel@vger.kernel.org, mtk-manpages@gmx.net
Subject: Re: compat_sys_times() bogus until jiffies >= 0.
Date: Fri, 09 Nov 2007 10:20:09 -0800	[thread overview]
Message-ID: <4734A4D9.3090907@redhat.com> (raw)
In-Reply-To: <4733206C.8030903@nortel.com>

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Chris Friesen wrote:
>> A possible remedy is to return the ticks since process start time, which
>> delays the wrap around much further.  POSIX only demands consistency
>> within the same process.
> 
> This would be an interesting solution.
> 
> The man page for linux states that the return code is time since system
> boot, so that could realistically be expected to correlate between
> different processes.

The Linux man page is documenting existing functionality on top of what
the standard requires.  Programmers should ever only require what the
standard guarantees.

I am perfectly willing to support a solution where the time is measured
from process startup time.  The only code using times() I found is
cross-platform and most likely does not depend on the value returned is
usable in isolation (only in a difference).

- --
➧ Ulrich Drepper ➧ Red Hat, Inc. ➧ 444 Castro St ➧ Mountain View, CA ❖
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  reply	other threads:[~2007-11-09 18:21 UTC|newest]

Thread overview: 37+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2007-11-07 22:47 compat_sys_times() bogus until jiffies >= 0 David Brown
2007-11-07 23:28 ` Andrew Morton
2007-11-08  0:18   ` Andrew Morton
2007-11-08  0:54     ` Andreas Schwab
2007-11-08  1:17       ` Andrew Morton
2007-11-08  1:53     ` Paul Mackerras
2007-11-08  2:09       ` David Miller
2007-11-08 10:20         ` Andreas Schwab
2007-11-08 14:42           ` Chris Friesen
2007-11-09 18:20             ` Ulrich Drepper [this message]
2007-12-20 11:36               ` Michael Kerrisk
2007-12-20 11:51                 ` David Miller
2007-12-22  0:42                   ` Andi Kleen
2007-12-22  1:41                     ` David Miller
2007-12-22  1:45                       ` David Miller
2007-12-22  1:53                         ` Andi Kleen
2007-12-22  4:36                           ` David Miller
2007-12-22 12:47                             ` Andi Kleen
2007-12-22  1:49                       ` Andi Kleen
2007-11-08 19:25         ` Denys Vlasenko
2007-11-08  3:07       ` Andrew Morton
2007-11-08  3:13         ` David Miller
2007-11-08  5:15           ` Paul Mackerras
2007-11-08  6:24             ` David Miller
2007-11-08  4:59         ` Paul Mackerras
2007-11-08  5:20           ` Andrew Morton
2007-11-08  5:36             ` Paul Mackerras
2007-11-08  6:12               ` Andrew Morton
2007-11-08  6:25             ` David Miller
2007-11-08  7:09               ` Andrew Morton
2007-11-08  7:14                 ` David Miller
2007-11-08  8:53               ` Paul Mackerras
2007-11-08  6:22           ` David Miller
2007-11-08 19:27         ` Denys Vlasenko
2007-11-08  0:50   ` David Miller
2007-11-08  1:13     ` Andrew Morton
2007-11-08  6:00   ` David Brown

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