Re: [PATCH v5 1/6] mm: rmap: fix cache flush on THP pages

2022-03-22 Thread Christoph Hellwig
On Fri, Mar 18, 2022 at 03:45:24PM +0800, Muchun Song wrote: > The flush_cache_page() only remove a PAGE_SIZE sized range from the cache. > However, it does not cover the full pages in a THP except a head page. > Replace it with flush_cache_range() to fix this issue. At least, no > problems were fo

[PATCH v5 1/6] mm: rmap: fix cache flush on THP pages

2022-03-18 Thread Muchun Song
The flush_cache_page() only remove a PAGE_SIZE sized range from the cache. However, it does not cover the full pages in a THP except a head page. Replace it with flush_cache_range() to fix this issue. At least, no problems were found due to this. Maybe because the architectures that have virtual in