lkml.org 
[lkml]   [2004]   [Mar]   [7]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: 2.4.23aa2 (bugfixes and important VM improvements for the high end)

* Jamie Lokier <jamie@shareable.org> wrote:

> Ingo Molnar wrote:
> > if mysql in fact calls time() frequently, then it should rather start a
> > worker thread that updates a global time variable every second.
>
> That has the same problem as discussed later in this thread with
> vsyscall-time: the worker thread may not run immediately it is woken,
> and also setitimer() and select() round up the delay a little more
> then expected, so sometimes the global time variable will be out of
> date and misordered w.r.t. gettimeofday() and stat() results of
> recently modified files.

we dont have any guarantees wrt. the synchronization of the time() and
the gettimeofday() clocks - irrespective of vsyscalls, do we?

Ingo
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2005-03-22 14:01    [from the cache]
©2003-2014 Jasper Spaans. Advertise on this site