Messages in this thread | | | Date | Sat, 10 Oct 2009 14:06:14 +0200 | From | Pavel Machek <> | Subject | Re: [PATCH 00/31] Swap over NFS -v20 |
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Hi!
> > One of them > > would be the whole VM/net work to just make swap over nbd/iscsi safe. > > Getting those two 'fixed' is going to be tons of interesting work > because they involve interaction with userspace daemons. > > NBD has fairly simple userspace, but iSCSI has a rather large userspace > footprint and a rather complicated user/kernel interaction which will be > mighty interesting to get allocation safe. > > Ideally the swap-over-$foo bits have no userspace component. > > That said, Wouter is the NBD userspace maintainer and has expressed > interest into looking at making that work, but its sure going to be > non-trivial, esp. since exposing PF_MEMALLOC to userspace is a, not over > my dead-bodym like thing.
Well, as long as nbd-server is on separate machine (with real swap), safe swapping over network should be ok, without PF_MEMALLOC for userspace or similar nightmares, right? Pavel
-- (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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