Date: Tue, 02 Mar 2010 11:32:52 +0100 From: Niclas Zeising <niclas.zeising@gmail.com> To: Alfred Perlstein <alfred@FreeBSD.org> Cc: svn-src-head@freebsd.org, svn-src-all@freebsd.org, src-committers@freebsd.org Subject: Re: svn commit: r204552 - in head/sys: conf kern net sys Message-ID: <4B8CE954.3080503@gmail.com> In-Reply-To: <201003020658.o226wwB2051156@svn.freebsd.org> References: <201003020658.o226wwB2051156@svn.freebsd.org>
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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
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