Ubuntu
linux package

  1. Bug #1680349
  2. Comment #44

Comment 44 for bug 1680349

Revision history for this message
bugproxy (bugproxy) wrote : Comment bridged from LTC Bugzilla

Hello Canonical,

There are two problems here

1. Hang when CPUs don't respond to IPI. This can be resolved by setting a non-zero panic timeout.
That fix is now available in Ubuntu releases.

2. But dump capture is still not successful with case1 fix as the system is reseting, if some CPUs
are not responding to IPIs, instead of booting into KDump kernel.

While case1 is resolved - the kernel doesn't hang anymore if some CPUs don't respond to IPIs. As for
case2, I suspect the reset could be happening in f/w while reinitializing CPUs. Need to confirm that
though. Also, exploring if it is possible to workaround what seems like a firwmare limitation. Please
keep the bug open while I work on case2. If we can't workaround case2, may have to close this as
will-not-fix.

Thanks
Hari