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SubjectRe: Linux 2.4.0-test8 and swap/journaling fs on raid
On Wednesday September 27, pavel@suse.cz wrote:
> Hi!
>
> > On Wednesday September 27, cservin@cromagnon.com wrote:
> > > I was just wondering if the issues with swap on a raid device and with using a
> > > journaling fs on a raid device had been fixed in the latest 2.4.0-test
> > > kernels?
> >
> > Yes. md in 2.4 doesn't do interesting things with the buffer cache,
> > so swap and journaling filesystems should have no issues with it.
>
> That is not neccessarily enough. nbd also does not play with buffer cache,
> still you can't swap onto it.

True.
However the reason that you cannot swap to RAID1/5 in 2.2 +
raid-patches is that it does interesting things with the buffer cache
while reconstructing drives.
As 2.4 doesn't, the reason is removed, and you can swap to it.

NeilBrown
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