linux-kernel - [BUG] Intermittent Keyboard Lockup 2.6.25.5 with debugger under heavy loads

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Message-ID: <AANLkTi=RtK_w1a3dw=pM51M5sfqUtURsADG-+rdB-d=u@mail.gmail.com>
Date:	Wed, 22 Sep 2010 11:34:58 -0600
From:	Jeffrey Merkey <jeffmerkey@...il.com>
To:	linux-kernel@...r.kernel.org
Subject: [BUG] Intermittent Keyboard Lockup 2.6.25.5 with debugger under heavy loads

Something changed between 2.6.35.1.  Under very heavy loads, I see the
keyboard loose interrupts and hang
when the scheduler is very busy.  Tracking it down.  Put a temp code
segment to read one of the keyboard
registers to clear previous pending interrupts.  The bug is the
keyboard gets a pending interrupt and never
services it.  Given the way the keyboard process is handled, looks
like a timing dependent scheduler bug
of some sort.

Jeff
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