Date: Mon, 9 Jan 2012 01:28:41 -0800 (PST) From: Don Lewis <truckman@FreeBSD.org> To: nvass@gmx.com Cc: arch@FreeBSD.org, adrian@FreeBSD.org, alfred@FreeBSD.org Subject: Re: [patch] allow crash dumps to Linux swap partitions Message-ID: <201201090928.q099Sfdh025417@gw.catspoiler.org> In-Reply-To: <4F0AB19C.6000601@gmx.com>
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On 9 Jan, Nikos Vassiliadis wrote: > On 1/9/2012 11:11 AM, Don Lewis wrote: >> On 9 Jan, Adrian Chadd wrote: >>> .. doesn't linux swap have some metadata somewhere? >> >> Darned if I know, but it doesn't seem to care about FreeBSD swap data >> overwriting its swap partition. > > Linux will not use the swap partition without the metadata. And > these metadata are located to the start of the partition, that > is, dumping core there will surely destroy them. Don't we write the crash dump at the end of the partition? I thought we did this to make it less likely that we would overwrite the crash dump by using swap before savecore had a chance to run. > Perhaps you can add a warning in the dumpon manual page, that the > swap metadata must be re-created after a coredump?
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