Andrea Arcangeli wrote: > On Thu, Mar 27, 2008 at 03:56:56PM +0200, Avi Kivity wrote: > >> That's not good. We need to support the older userspace, for a while yet. >> >> Why is there a problem? IIRC it's just anonymous memory. >> > > Problem is that for it to be unmapped __do_fault must call > page_add_new_anon_rmap on it. Even anon would be 1, that would mean > cow and that's clearly not what you want as it would lose the > visibility on the future guest writes. anon will be 0 if qemu is > reading for example, leaving pinned anonymous memory that mmu > notifiers won't be able to swap anymore. This is about providing the > guarantee to the admin, that if he enables the mmu notifiers in the > kernel, giving access to /dev/kvm won't give full mlock privileges > too. Not sure if anybody will care, but it's a bit like removing the > limit on tmpfs that only half ram can be pinned. >
We can put it under a Kconfig option. -- error compiling committee.c: too many arguments to function ------------------------------------------------------------------------- Check out the new SourceForge.net Marketplace. It's the best place to buy or sell services for just about anything Open Source. http://ad.doubleclick.net/clk;164216239;13503038;w?http://sf.net/marketplace _______________________________________________ kvm-devel mailing list kvm-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/kvm-devel
