diff --git a/2006-01-23-ibm-thinkcentre-a50-slowdown.html b/2006-01-23-ibm-thinkcentre-a50-slowdown.html
new file mode 100644
index 0000000..e9d089e
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+++ b/2006-01-23-ibm-thinkcentre-a50-slowdown.html
@@ -0,0 +1,27 @@
+<!--# set var="title" value="IBM ThinkCentre A50 Slowdown" -->
+<!--# set var="date" value="January 23, 2006" -->
+
+<!--# include file="include/top.html" -->
+
+<p>I’ve got a bunch of IBM ThinkCentre A50 machines that can’t run linux-2.6, tested 2.6.8 - 2.6.15. They boot and work for up to 24 hours, then they just get horribly slow (60 seconds+ on any I/O). Sometimes, they speed up again for awhile, then slow down. A reboot always fixes it. The kernel sysrq backtrace of the issue is the oddest part. Here’s top hanging:</p>
+
+<pre><code>Sep 16 00:48:20 localhost kernel: top           S C0392F20     0  5582   4634                     (NOTLB)
+Sep 16 00:48:20 localhost kernel: c2859ebc 00000086 c45b8520 c0392f20 c2859f98 cf764f00 392f2780 000f62c9
+Sep 16 00:48:20 localhost kernel:        00000000 c45b8520 392f2780 000f62c9 c2858000 c2859ed0 00000246 00000000
+Sep 16 00:48:20 localhost kernel:        00000000 0221df22 c2859ed0 ce7ccc00 00000000 c02a853d c2859ed0 0221df22
+Sep 16 00:48:20 localhost kernel: Call Trace:
+Sep 16 00:48:20 localhost kernel:  [schedule_timeout+93/208] schedule_timeout+0x5d/0xd0
+Sep 16 00:48:20 localhost kernel:  [proc_pid_readdir+97/560] proc_pid_readdir+0x61/0x230
+Sep 16 00:48:20 localhost kernel:  [process_timeout+0/16] process_timeout+0x0/0x10
+Sep 16 00:48:20 localhost kernel:  [do_select+671/848] do_select+0x29f/0x350
+Sep 16 00:48:20 localhost kernel:  [proc_info_read+165/192] proc_info_read+0xa5/0xc0
+Sep 16 00:48:20 localhost kernel:  [__pollwait+0/208] __pollwait+0x0/0xd0
+Sep 16 00:48:20 localhost kernel:  [sys_select+578/992] sys_select+0x242/0x3e0
+Sep 16 00:48:20 localhost kernel:  [syscall_call+7/11] syscall_call+0x7/0xb
+</code></pre>
+
+<p>Blocking in I/O I can handle, but I/O on /proc?!?!</p>
+
+<p>Oh, and 2.4.27 works fine.</p>
+
+<!--# include file="include/bottom.html" -->
diff --git a/index.html b/index.html
index 189dc79..a7eb00f 100644
--- a/index.html
+++ b/index.html
@@ -40,6 +40,7 @@
 <li>2009-Sep-11: <a href="2009-09-11-confusing-bind-with-cnames.html">Confusing BIND with CNAMEs</a></li>
 <li>2009-Feb-19: <a href="2019-02-19-the-odd-case-of-my-mugging.html">The odd case of my mugging</a></li>
 <li>2009-Feb-03: <a href="2009-02-03-5-packet-tcp-connection.html">5-packet TCP connection?</a></li>
+<li>2006-Jan-23: <a href="2006-01-23-ibm-thinkcentre-a50-slowdown.html">IBM ThinkCentre A50 Slowdown</a></li>
 <li>2006-Jan-23: <a href="2006-01-23-ssh-tunnelling-101.html">SSH Tunnelling 101</a></li>
 <li>2006-Jan-23: <a href="2006-01-23-how-to-install-debian-sarge-on-an-ibm-blade.html">How to install Debian Sarge on an IBM Blade</a></li>
 <li>2006-Jan-22: <a href="2006-01-22-why-does-my-machine-think-its-name-is-localhost-even-though-i-changed-it.html">Why does my machine think its name is localhost...</a></li>
diff --git a/markdown/2006-01-23-ibm-thinkcentre-a50-slowdown.md b/markdown/2006-01-23-ibm-thinkcentre-a50-slowdown.md
new file mode 100644
index 0000000..7a404fa
--- /dev/null
+++ b/markdown/2006-01-23-ibm-thinkcentre-a50-slowdown.md
@@ -0,0 +1,26 @@
+<!--# set var="title" value="IBM ThinkCentre A50 Slowdown" -->
+<!--# set var="date" value="January 23, 2006" -->
+
+<!--# include file="include/top.html" -->
+
+I’ve got a bunch of IBM ThinkCentre A50 machines that can’t run linux-2.6, tested 2.6.8 - 2.6.15. They boot and work for up to 24 hours, then they just get horribly slow (60 seconds+ on any I/O). Sometimes, they speed up again for awhile, then slow down. A reboot always fixes it. The kernel sysrq backtrace of the issue is the oddest part. Here’s top hanging:
+
+	Sep 16 00:48:20 localhost kernel: top           S C0392F20     0  5582   4634                     (NOTLB)
+	Sep 16 00:48:20 localhost kernel: c2859ebc 00000086 c45b8520 c0392f20 c2859f98 cf764f00 392f2780 000f62c9
+	Sep 16 00:48:20 localhost kernel:        00000000 c45b8520 392f2780 000f62c9 c2858000 c2859ed0 00000246 00000000
+	Sep 16 00:48:20 localhost kernel:        00000000 0221df22 c2859ed0 ce7ccc00 00000000 c02a853d c2859ed0 0221df22
+	Sep 16 00:48:20 localhost kernel: Call Trace:
+	Sep 16 00:48:20 localhost kernel:  [schedule_timeout+93/208] schedule_timeout+0x5d/0xd0
+	Sep 16 00:48:20 localhost kernel:  [proc_pid_readdir+97/560] proc_pid_readdir+0x61/0x230
+	Sep 16 00:48:20 localhost kernel:  [process_timeout+0/16] process_timeout+0x0/0x10
+	Sep 16 00:48:20 localhost kernel:  [do_select+671/848] do_select+0x29f/0x350
+	Sep 16 00:48:20 localhost kernel:  [proc_info_read+165/192] proc_info_read+0xa5/0xc0
+	Sep 16 00:48:20 localhost kernel:  [__pollwait+0/208] __pollwait+0x0/0xd0
+	Sep 16 00:48:20 localhost kernel:  [sys_select+578/992] sys_select+0x242/0x3e0
+	Sep 16 00:48:20 localhost kernel:  [syscall_call+7/11] syscall_call+0x7/0xb
+
+Blocking in I/O I can handle, but I/O on /proc?!?!
+
+Oh, and 2.4.27 works fine.
+
+<!--# include file="include/bottom.html" -->
diff --git a/markdown/index.md b/markdown/index.md
index 07af9ec..7594067 100644
--- a/markdown/index.md
+++ b/markdown/index.md
@@ -39,6 +39,7 @@
 1. 2009-Sep-11: [Confusing BIND with CNAMEs](2009-09-11-confusing-bind-with-cnames.html)
 1. 2009-Feb-19: [The odd case of my mugging](2019-02-19-the-odd-case-of-my-mugging.html)
 1. 2009-Feb-03: [5-packet TCP connection?](2009-02-03-5-packet-tcp-connection.html)
+1. 2006-Jan-23: [IBM ThinkCentre A50 Slowdown](2006-01-23-ibm-thinkcentre-a50-slowdown.html)
 1. 2006-Jan-23: [SSH Tunnelling 101](2006-01-23-ssh-tunnelling-101.html)
 1. 2006-Jan-23: [How to install Debian Sarge on an IBM Blade](2006-01-23-how-to-install-debian-sarge-on-an-ibm-blade.html)
 1. 2006-Jan-22: [Why does my machine think its name is localhost...](2006-01-22-why-does-my-machine-think-its-name-is-localhost-even-though-i-changed-it.html)