[issue1031] panic: hammer_mount: malloc limit exceeded
Matthew Dillon
dillon at apollo.backplane.com
Wed Jun 11 11:34:20 PDT 2008
:After the 53H commit, the panic does'nt occur anymore.
:
:There's a deadlock instead: after about 5 minutes of copying the machine
:stopped responding. No specific message on the console, display frozen.
:
:I tried to break into the debugger with CTRL-ALT-ESC but it didn't change
:anything.
:
:--
:Francois Tigeot
I have been able to reproduce this. I can reproduce it sometimes when
I run blogbench.
I think what is happening is that the buffer cache is getting blown
out with too many B_LOCKED buffers and for some reason is not
recovering, and the buffer cache is live-locking inside a critical
section.
I should be able to track it down soon. The same problem also appears
to be the cause of blogbench's performance drop-off.
-Matt
Matthew Dillon
<dillon at backplane.com>
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