Re: [Qemu-devel] [PATCH] add MADV_DONTFORK to guest physical memory

[Andrea Arcangeli]

On Wed, Jan 05, 2011 at 02:26:19PM -0600, Michael Roth wrote:
> Yah you're right, but I've seen several discussions about using mempath 
> for tmpfs/ram-backed files for things like numa/zram/etc so tend to 
> think of it as something potentially more than just a hook for 
> hugetlbfs, which is becoming less and less useful. But the MADV_DONTFORK 
> stuff should still be immediately applicable.

Yes, MADV_DONTFORK should be set all on all guest physical memory
without options so I hope the new patch I just posted is fine to stop
the spurious -ENOMEM failures in fork.

The ksm part should go incremental but 99% of it will be about
changing the command line, making the madvise conditional will be
trivial as well.