From: Tim Schmielau <tim@physik3.uni-rostock.de>
To: linux-ia64@vger.kernel.org
Subject: [Linux-ia64] [BUG & WORKAROUND] nanosleep() granularity bumps up in 2.5.64
Date: Mon, 17 Mar 2003 19:42:31 +0000 [thread overview]
Message-ID: <marc-linux-ia64-105590709806144@msgid-missing> (raw)
On Mon, 17 Mar 2003, Tim Schmielau wrote:
> On Mon, 17 Mar 2003, Vitezslav Samel wrote:
>
> > The nanosleep() bug narrowed down to 2.5.63-bk2. That's version, the "initial
> > jiffies" patch went in. And yes, it's on i686 machine.
>
> You can easily check whether it's connected with this change by setting
> INITIAL_JIFFIES to zero. This should exactly recover the previous
> situation.
OK. I've done the test myself and I plead guilty. As a temporary
workaround you can apply the following patch:
--- linux-2.5.64/include/linux/time.h.orig Wed Mar 5 04:29:24 2003
+++ linux-2.5.64/include/linux/time.h Mon Mar 17 20:31:06 2003
@@ -31,7 +31,7 @@
* Have the 32 bit jiffies value wrap 5 minutes after boot
* so jiffies wrap bugs show up earlier.
*/
-#define INITIAL_JIFFIES ((unsigned int) (-300*HZ))
+#define INITIAL_JIFFIES 0
/*
* Change timeval to jiffies, trying to avoid the
Still, after half an hour of glancing at the code I can't see my mistake.
I've re-checked that the problem does not occur with the original "initial
jiffies" patch for 2.4. So I must have missed a (subtle?) difference
between 2.4 and 2.5 when I did the forward-port.
Sorry,
Tim
reply other threads:[~2003-03-17 19:42 UTC|newest]
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