Is it permitted to call flush_dcache_page() on pages that are not in the
page cache?
The documentation is ambiguous, it only mentions how archs can handle
dcache aliases for page cache users.
What about the user space accesses that kmap user space pages directly,
without copy_*_user?
For example:
- ptrace
- disk transfers that end up calling __bio_kmap() - RAID-5, ide error
handling.
Could be from irq context!
- hole handling for O_DIRECT file access.
In all 3 cases, the target could be outside of the page cache.
--
Manfred
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This archive was generated by hypermail 2b29 : Thu Oct 31 2002 - 22:00:37 EST