--- Peter Wemm <[EMAIL PROTECTED]> wrote: > On Friday 07 April 2006 12:47 pm, Paul Marciano > wrote: > > Hello. I read a while back about someone working > on > > supporting sparse kernel crash dumps (dumping only > the > > active kernel pages to the dump device as opposed > to > > all physical memory - for machines where the phys > mem > > is greater than the dump dev space.) > > > > Does anyone know the status of that project? Was > it > > committed, or are there plans to commit it? > > I have a working prototype as of last night. There > should be something > committable in the next week or two. > > When I boot my 2GB machine and force a crash dump > from single user mode, the > fully debuggable vmcore file is in the 40-50MB > range. A busy machine with > 12GB ram took about 150MB to dump. > > There are still some things to work out. It was > written for the amd64 kernel, > but can be ported to i386. > > -Peter >
That's very timely news Peter. Do you think your code is easily back-portable to 5.4? Are the changes limited to dump_machdep.c or otherwise not dependent on a great deal of -current updates? Do you compress the data stream at all (e.g. gzip)? I have a specific need on a CompactFlash based system. I have a 256MB IDE mode card on a machine with 512MB physical memory. I can probably commit 128MB of the card as a dumpdev but I can't go beyond that. Good luck with it. Regards, Paul. __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com _______________________________________________ email@example.com mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "[EMAIL PROTECTED]"