[issue1031] panic: hammer_mount: malloc limit exceeded

[Matthew Dillon]

: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>