Messages in this thread | | | Date | Tue, 31 Jul 2012 17:41:51 +0100 | From | "Jan Beulich" <> | Subject | Re: [Xen-devel] [PATCH] extend_brk and fixes to users of extend_brk (v1). |
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>>> On 31.07.12 at 18:15, Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> wrote: > On Tue, Jul 31, 2012 at 08:49:21AM -0700, H. Peter Anvin wrote: >> This means you're either abusing the brk allocator to do something >> it is not meant to do... which may mean you can a failure in *other* >> code, or you have a bug in your code that you haven't fixed. > > Its the latter - and of one of the patches in this patchset fixes that.
But then you also can't assume that fitting a 2Gb MMIO hole will suffice; I have a machine here that I can configure to have a 3Gb hole, so I think you really need to be on the safe side and allow to cover all the way up to 4Gb with the space you reserve.
Jan
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