Messages in this thread | ![/](/images/icornerl.gif) | | Date | Thu, 03 Apr 2003 08:49:55 -0600 | From | Dave McCracken <> | Subject | Re: [PATCH 2.5.66-mm2] Fix page_convert_anon locking issues |
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--On Wednesday, April 02, 2003 17:58:08 -0600 Dave McCracken <dmccr@us.ibm.com> wrote:
> It's looking more and more like we should use your other suggestion. It's > definitely simpler if we can make it failsafe. I'll code it up tomorrow.
I thought of a big hole in the simpler scheme you suggested. It occurred to me that try_to_unmap will fail. It will see the PageAnon flag so it'll just walk the pte_chain and assume it doesn't have to walk the vmas. This will leave the page with some stranded mappings. Actually page_convert_anon will then finish, and we'll have a page where try_to_unmap claims it has succeeded but still has mappings.
Dave McCracken
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