svn commit: r204552 - in head/sys: conf kern net sys

[Alfred Perlstein]

* Niclas Zeising <niclas.zeising at gmail.com> [100302 02:52] wrote:
> On 2010-03-02 07:58, Alfred Perlstein wrote:
> >Author: alfred
> >Date: Tue Mar  2 06:58:58 2010
> >New Revision: 204552
> >URL: http://svn.freebsd.org/changeset/base/204552
> >
> >Log:
> >   Merge projects/enhanced_coredumps (r204346) into HEAD:
> >
> >     Enhanced process coredump routines.
> >
> >     This brings in the following features:
> >     1) Limit number of cores per process via the %I coredump formatter.
> >     Example:
> >       if corefilename is set to %N.%I.core AND num_cores = 3, then
> >       if a process "rpd" cores, then the corefile will be named
> >       "rpd.0.core", however if it cores again, then the kernel will
> >       generate "rpd.1.core" until we hit the limit of "num_cores".
> >
> >       this is useful to get several corefiles, but also prevent filling
> >       the machine with corefiles.
> >
> >     2) Encode machine hostname in core dump name via %H.
> >
> >     3) Compress coredumps, useful for embedded platforms with limited 
> >     space.
> >       A sysctl kern.compress_user_cores is made available if turned on.
> >
> >       To enable compressed coredumps, the following config options need 
> >       to be set:
> >       options COMPRESS_USER_CORES
> >       device zlib   # brings in the zlib requirements.
> >       device gzio   # brings in the kernel vnode gzip output module.
> >
> >     4) Eventhandlers are fired to indicate coredumps in progress.
> >
> >     5) The imgact sv_coredump routine has grown a flag to pass in more
> >     state, currently this is used only for passing a flag down to compress
> >     the coredump or not.
> >
> >     Note that the gzio facility can be used for generic output of gzip'd
> >     streams via vnodes.
> >
> >   Obtained from: Juniper Networks
> >   Reviewed by: kan
> >
> 
> [SNIP diff]
> 
> Nice work!
> Can you please document the gernel options and devices in NOTES and 
> where to change the core filename format somewhere so it doesn't get lost.
> 
> Thanks!
> //Niclas

on it.

-- 
- Alfred Perlstein
.- AMA, VMOA #5191, 03 vmax, 92 gs500, 85 ch250
.- FreeBSD committer