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
--
SUSE Labs, Novell Inc.
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