Messages in this thread | | | Date | Sun, 15 Oct 2006 17:54:46 +1000 | From | Nick Piggin <> | Subject | Re: [patch 3/3] mm: fault handler to replace nopage and populate |
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Hi Ingo,
Ingo Oeser wrote: > Hi Nick, > > On Thursday, 12. October 2006 14:07, Nick Piggin wrote: > >>Actually, filemap_xip needs some attention I think... if xip files >>can be truncated or invalidated (I assume they can), then we need to >>lock the page, validate that it is the correct one and not truncated, >>and return with it locked. > > > ??? > > Isn't XIP for "eXecuting In Place" from ROM or FLASH?
Yes, I assume so. It seems that it isn't restricted to executing, but is basically a terminology to mean that it bypasses the pagecache.
> How to truncate these? I thought the whole idea of > XIP was a pure RO mapping?
Well, not filemap_xip.
> > They should be valid from mount to umount. > > Regards > > Ingo Oeser, a bit puzzled about that...
See mm/filemap_xip.c:xip_file_write, xip_truncate_page.
Thanks, Nick
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