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Re: [RFC PATCH] xen/x86: Increase xen_e820_map to E820_X_MAX possible entries

From Alex Thorlton <athorlton@sgi.com>
Newsgroups linux.kernel
Subject Re: [RFC PATCH] xen/x86: Increase xen_e820_map to E820_X_MAX possible entries
Date 2016-11-15 16:30 +0100
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On Tue, Nov 15, 2016 at 10:55:49AM +0100, Juergen Gross wrote:
> I'd go with the new error code. What about E2BIG or ENOSPC?
> 
> I think the hypervisor should fill in the number of entries required
> in this case.
> 
> In case nobody objects I can post patches for this purpose (both Xen
> and Linux).

This sounds like a good solution to me.  I think it's definitely more
appropriate than simply bumping up the size of xen_e820_map, especially
considering the fact that it's theoretically possible for the e820 map
generated by the hypercall to grow too large, even on a non-EFI machine,
where my change would have no effect.

Thanks for your input!

- Alex

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Thread

[RFC PATCH] xen/x86: Increase xen_e820_map to E820_X_MAX possible entries Alex Thorlton <athorlton@sgi.com> - 2016-11-15 01:20 +0100
  Re: [RFC PATCH] xen/x86: Increase xen_e820_map to E820_X_MAX possible  entries Juergen Gross <jgross@suse.com> - 2016-11-15 07:40 +0100
    Re: [RFC PATCH] xen/x86: Increase xen_e820_map to E820_X_MAX  possible entries "Jan Beulich" <JBeulich@suse.com> - 2016-11-15 08:20 +0100
    Re: [RFC PATCH] xen/x86: Increase xen_e820_map to E820_X_MAX possible  entries Juergen Gross <jgross@suse.com> - 2016-11-15 08:40 +0100
      Re: [RFC PATCH] xen/x86: Increase xen_e820_map to E820_X_MAX  possible entries "Jan Beulich" <JBeulich@suse.com> - 2016-11-15 09:10 +0100
      Re: [RFC PATCH] xen/x86: Increase xen_e820_map to E820_X_MAX possible  entries Juergen Gross <jgross@suse.com> - 2016-11-15 09:50 +0100
        Re: [RFC PATCH] xen/x86: Increase xen_e820_map to E820_X_MAX  possible entries "Jan Beulich" <JBeulich@suse.com> - 2016-11-15 10:50 +0100
        Re: [RFC PATCH] xen/x86: Increase xen_e820_map to E820_X_MAX possible  entries Juergen Gross <jgross@suse.com> - 2016-11-15 11:00 +0100
          Re: [RFC PATCH] xen/x86: Increase xen_e820_map to E820_X_MAX  possible entries "Jan Beulich" <JBeulich@suse.com> - 2016-11-15 11:50 +0100
          Re: [RFC PATCH] xen/x86: Increase xen_e820_map to E820_X_MAX possible  entries Juergen Gross <jgross@suse.com> - 2016-11-15 12:10 +0100
            Re: [RFC PATCH] xen/x86: Increase xen_e820_map to E820_X_MAX  possible entries "Jan Beulich" <JBeulich@suse.com> - 2016-11-15 12:20 +0100
          Re: [RFC PATCH] xen/x86: Increase xen_e820_map to E820_X_MAX  possible entries Alex Thorlton <athorlton@sgi.com> - 2016-11-15 16:30 +0100
            Re: [RFC PATCH] xen/x86: Increase xen_e820_map to E820_X_MAX possible  entries Juergen Gross <jgross@suse.com> - 2016-11-16 07:10 +0100

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