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Re: Machine livelock with latest (4.99.48) kernel on sparc64

Rafal Boni wrote:
Rafal Boni wrote:
I just rebooted my trusty Netra T1 with a shiny new 4.99.48 kernel and
thought I'd kick off a userland build.  Things seemed to go swimmingly
for a few minutes, then the machine ground to an un-usable state --
userland seems to be mostly non-responsive, though the machine is
pingable, answers a ^T at a tty (well, it seems to be wedged harder
now.. it did for a while after the apparent lockup), and the disk sounds
like progress is being made on the build.

But, I can't get any echo from a tty anymore, and god forbid I should
want to log in ;)

Anyone seeing anything similar?  Should I go back to the last-known-good
kernel for a while? ;)

Machine is a Netra T1 200 -- UltraSPARC-IIe @ 500 MHz with 512MB RAM.

So I thought I'd give it one more try, and I saw the same thing happen this time with a kernel build (thought I'd see if I maybe there was something else in the latest CVS that would help).

The machine locked up ~ 18:01; it's now 2+ hours later and the disk is still chugging along. Here's the last thing 'top' on the console said before the hang:

load averages: 4.95, 4.71, 3.82 up 0 days, 13:48 18:01:34
29 processes:  1 runnable, 27 sleeping, 1 on processor
CPU states: 0.0% user, 0.0% nice, 8.1% system, 3.4% interrupt, 88.5% idle
Memory: 184K Act, 336K Inact, 6096K Wired, 128K Exec, 328K File, 304K Free
Swap: 2050M Total, 36M Used, 2014M Free

Unless top's reporting is just way off (it didn't seem to be at the start), there's a sucking memory leak somewhere -- where'd the other 500 MB of memory go?

DDB's ps/l (as well as backtrace) also shows an interesting fact -- the active LWP is the system idle loop every time I'd ended up in DDB due to this hang.


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