Date: Sat, 15 Dec 2012 23:35:00 +0200 From: Andriy Gapon <avg@FreeBSD.org> To: Pawel Jakub Dawidek <pjd@FreeBSD.org> Cc: Adrian Chadd <adrian@FreeBSD.org>, Alfred Perlstein <alfred@FreeBSD.org>, John Baldwin <jhb@FreeBSD.org>, svn-src-all@FreeBSD.org, Alfred Perlstein <bright@mu.org>, src-committers@FreeBSD.org, Navdeep Parhar <np@FreeBSD.org>, svn-src-head@FreeBSD.org Subject: Re: svn commit: r244112 - head/sys/kern Message-ID: <50CCED04.1000101@FreeBSD.org> In-Reply-To: <20121215210333.GH1411@garage.freebsd.pl> References: <201212110708.qBB78EWx025288@svn.freebsd.org> <201212121046.43706.jhb@freebsd.org> <CAJ-Vmo=U04GX%2BZyKuzXLwV%2BPpzU6_dm5BCmL=DWfsmhTVAR%2BsA@mail.gmail.com> <201212121658.49048.jhb@freebsd.org> <50C90567.8080406@FreeBSD.org> <50C909BD.9090709@mu.org> <50C91B32.4080904@FreeBSD.org> <50C91CD3.7030900@mu.org> <50C9206D.6080502@FreeBSD.org> <50C9271C.70803@mu.org> <20121215210333.GH1411@garage.freebsd.pl>
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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
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