Messages in this thread | ![/](/images/icornerl.gif) | | Date | Thu, 3 Apr 2003 12:06:11 -0800 | From | Andrew Morton <> | Subject | Re: [PATCH 2.5.66-mm2] Fix page_convert_anon locking issues |
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Dave McCracken <dmccr@us.ibm.com> wrote: > > > --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. >
page_referenced() has the same problem, so refill_inactive_zone() will need to lock pages too.
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