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Re: [Xen-devel] libxc: correctly unmap pages after core-dumping a pv guest
Markus Groß writes ("[Xen-devel] libxc: correctly unmap pages after
core-dumping a pv guest"):
> But to unmap the pages later, the dinfo->p2m_size has to be set accordingly.
> This was not done, instead a variable named p2m_size was set.
> This way P2M_FL_ENTRIES was always zero and the pages were left mapped.
> The following patch fixes this.
Thanks. The existing code here is pretty unfortunate.
In xc_domain_dumpcore_via_callback where you make your change, "dinfo"
refers to a struct domain_info_context which is local to that
function. But in the called function xc_core_arch_map_p2m_rw, "dinfo"
refers to another identical structure allocated locally to the small
wrapper function xc_core_arch_map_p2m. All rather tangled.
But, anyway, your change is correct so I have applied it.
Next time, though, can you please be sure to add a Signed-off-by line,
to signify your certification in accordance with the Developer's
Certificate of Origin ? In this case I'll go ahead as it's only a
couple of lines.
>From Documentation/SubmittingPatches in the Linux kernel tree:
Developer's Certificate of Origin 1.1
By making a contribution to this project, I certify that:
(a) The contribution was created in whole or in part by me and I
have the right to submit it under the open source license
indicated in the file; or
(b) The contribution is based upon previous work that, to the best
of my knowledge, is covered under an appropriate open source
license and I have the right under that license to submit that
work with modifications, whether created in whole or in part
by me, under the same open source license (unless I am
permitted to submit under a different license), as indicated
in the file; or
(c) The contribution was provided directly to me by some other
person who certified (a), (b) or (c) and I have not modified
(d) I understand and agree that this project and the contribution
are public and that a record of the contribution (including all
personal information I submit with it, including my sign-off) is
maintained indefinitely and may be redistributed consistent with
this project or the open source license(s) involved.
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