On Sun, 4 Nov 2007, BERTRAND Joël wrote:

Justin Piszcz wrote:

quoted

# ps auxww | grep D
USER       PID %CPU %MEM    VSZ   RSS TTY      STAT START   TIME COMMAND
root       273  0.0  0.0      0     0 ?        D    Oct21  14:40 [pdflush]
root       274  0.0  0.0      0     0 ?        D    Oct21  13:00 [pdflush]

After several days/weeks, this is the second time this has happened, while 
doing regular file I/O (decompressing a file), everything on the device 
went into D-state.

	Same observation here (kernel 2.6.23). I can see this bug when I try 
to synchronize a raid1 volume over iSCSI (each element is a raid5 volume), or 
sometimes only with a 1,5 TB raid5 volume. When this bug occurs, md subsystem 
eats 100% of one CPU and pdflush remains in D state too. What is your 
architecture ? I use two 32-threads T1000 (sparc64), and I'm trying to 
determine if this bug is arch specific.

	Regards,

	JKB

Using x86_64 here (Q6600/Intel DG965WH).

Justin.