Re: md resync vs. swap (was Re: Swap not starting)
On Thu, 10 Jan 2002, Dave Sherohman wrote:
> On Thu, Jan 10, 2002 at 11:13:11AM -0500, Mike Dresser wrote:
> > Something in the back of my mind says it's to do with having a swap
> > file/partition on the raid volume, that that is a bad thing while it is
> > syncing it.
> >
> > I don't remember exactly though.
>
> I suppose that could lead to some nasty recursion if it had to swap
> while resyncing the swap device...
>
> If that's the only reason, though, then it seems like it should be safe
> to activate non-md swap devices without any concern for what the md
> subsystem is up to.
>
> Anyone know of other reasons why taking that check out and running
> swapon unconditionally might be a bad idea?
Well, swap devices over lvm, which has sort of the same problem with swap
devices over raid.
Bottom line: don't do something as dumb as swap on lvm ;-)
BTW, swap on a md device should be safe, IF the md device is running
(rebuilding or not -- doing it during a rebuild will probably slow down the
system to a crawl, though).
--
"One disk to rule them all, One disk to find them. One disk to bring
them all and in the darkness grind them. In the Land of Redmond
where the shadows lie." -- The Silicon Valley Tarot
Henrique Holschuh
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