Hello,

the main linux tree started suffering the same bug as described for -mm 
earlier in http://lkml.org/lkml/2005/11/7/147:

if I put load on my system, connect to the Internet using my cellphone 
(/dev/ttyS0) and do something, it stops reacting to PS/2 keyboard 
events, but still understands PS/2 mouse. The PPP load monitor shows 
huge transfer rate (several megabytes per second) consisting of the 
infinitely replicated several last packets. events/0 consumes all the 
CPU. tty buffering revamping patch is the obvious candidate, but I 
haven't tried to revert it yet.

As recommended earlier, I hit Sysrq+T several times. Config ans dmesg 
with the results attached. lspci and lspci -n below:

0000:00:00.0 Host bridge: VIA Technologies, Inc. VT82C693A/694x [Apollo 
PRO133x] (rev c4)
0000:00:01.0 PCI bridge: VIA Technologies, Inc. VT82C598/694x [Apollo 
MVP3/Pro133x AGP]
0000:00:07.0 ISA bridge: VIA Technologies, Inc. VT82C686 [Apollo Super 
South] (rev 40)
0000:00:07.1 IDE interface: VIA Technologies, Inc. 
VT82C586A/B/VT82C686/A/B/VT823x/A/C PIPC Bus Master IDE (rev 06)
0000:00:07.2 USB Controller: VIA Technologies, Inc. VT82xxxxx UHCI USB 
1.1 Controller (rev 1a)
0000:00:07.4 SMBus: VIA Technologies, Inc. VT82C686 [Apollo Super ACPI] 
(rev 40)0000:00:0b.0 Communication controller: Lucent Microelectronics 
LT WinModem (rev 02)
0000:00:0d.0 Multimedia audio controller: Fortemedia, Inc Xwave QS3000A 
[FM801] (rev b2)
0000:00:0d.1 Input device controller: Fortemedia, Inc Xwave QS3000A 
[FM801 game port] (rev b2)
0000:01:00.0 VGA compatible controller: ATI Technologies Inc RV280 
[Radeon 9200] (rev 01)

0000:00:00.0 0600: 1106:0691 (rev c4)
0000:00:01.0 0604: 1106:8598
0000:00:07.0 0601: 1106:0686 (rev 40)
0000:00:07.1 0101: 1106:0571 (rev 06)
0000:00:07.2 0c03: 1106:3038 (rev 1a)
0000:00:07.4 0c05: 1106:3057 (rev 40)
0000:00:0b.0 0780: 11c1:044c (rev 02)
0000:00:0d.0 0401: 1319:0801 (rev b2)
0000:00:0d.1 0980: 1319:0802 (rev b2)
0000:01:00.0 0300: 1002:5961 (rev 01)

The test load is the parallel execution of the following:

cat /dev/urandom >/dev/nul
find / -xdev
glxgears
LIBGL_ALWAYS_INDIRECT=1 glxgears
thunderbird

-- 
Alexander E. Patrakov