Blame xserver-1.5.2-mieq-backtrace.patch
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From b736f477f5324f79af30fc0f941ba0714a34ccda Mon Sep 17 00:00:00 2001
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From: Adam Jackson <ajax@redhat.com>
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Date: Fri, 10 Oct 2008 16:33:24 -0400
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Subject: [PATCH] mieq: Backtrace when the queue overflows.
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Since we're probably stuck down in a driver somewhere, let's at least
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try to point out where. This will need to be rethought when the input
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thread work lands though.
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---
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mi/mieq.c | 6 ++++++
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1 files changed, 6 insertions(+), 0 deletions(-)
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diff --git a/mi/mieq.c b/mi/mieq.c
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index 0a1b740..062dede 100644
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--- a/mi/mieq.c
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+++ b/mi/mieq.c
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@@ -169,6 +169,7 @@ mieqEnqueue(DeviceIntPtr pDev, xEvent *e)
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oldtail = (oldtail - 1) % QUEUE_SIZE;
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}
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else {
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+ static int stuck = 0;
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newtail = (oldtail + 1) % QUEUE_SIZE;
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/* Toss events which come in late. Usually this means your server's
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* stuck in an infinite loop somewhere, but SIGIO is still getting
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@@ -176,8 +177,13 @@ mieqEnqueue(DeviceIntPtr pDev, xEvent *e)
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if (newtail == miEventQueue.head) {
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ErrorF("[mi] EQ overflowing. The server is probably stuck "
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"in an infinite loop.\n");
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+ if (!stuck) {
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+ xorg_backtrace();
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+ stuck = 1;
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+ }
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return;
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}
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+ stuck = 0;
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miEventQueue.tail = newtail;
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}
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--
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1.6.0.1
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