svn commit: r244112 - head/sys/kern

[Andriy Gapon]

on 15/12/2012 23:03 Pawel Jakub Dawidek said the following:
> On Wed, Dec 12, 2012 at 04:53:48PM -0800, Alfred Perlstein wrote:
>> Like what if I do gzipp'd kernel dumps next? (on my todo list)  How many
>>  people will complain that "gzip is too dangerous in kernel context foo 
>> foo!!!!"
>> 
>> Not sure, I guess I'll find out?
> 
> Well... :) savecore(8) has an option to compress the dumps. The only use 
> case for compressing-while-dumping I see is small swap/dump partition. I'm
> not against this change, but I would not use it myself. When you are 
> dumping your kernel is in undefined state, so the less code you execute in
> that state the higher chances your dump will succeed. I much prefer to
> either compress the dumps with savecore(8) or use ZFS dataset with 
> compression enabled for /var/crash/.

Actually compressing core is a good thing when done right.  It can speed up
the core dumping process in addition to requiring less space.

-- 
Andriy Gapon