LKML Archive on lore.kernel.org
help / color / mirror / Atom feed
* fix memcpy_to_page and memzero_page
@ 2021-07-13  5:52 Christoph Hellwig
  2021-07-13  5:52 ` [PATCH 1/2] mm: call flush_dcache_page in " Christoph Hellwig
  2021-07-13  5:52 ` [PATCH 2/2] mm: use kmap_local_page in memzero_page Christoph Hellwig
  0 siblings, 2 replies; 6+ messages in thread
From: Christoph Hellwig @ 2021-07-13  5:52 UTC (permalink / raw)
  To: Andrew Morton; +Cc: Ira Weiny, linux-kernel, linux-mm

Hi all,

we need to call flush_dcache_page on any kmapped page, and on any page
we write to that may be mapped into the page cache, which can happen
quite frequently for anything we use raw pages for.

Patch 1 make sure memcpy_to_page and memzero_page to do the right thing
for that, and patch 2 fixes up the lost switch to kmap_local_page for
memzero_page.

^ permalink raw reply	[flat|nested] 6+ messages in thread

end of thread, other threads:[~2021-07-14  8:09 UTC | newest]

Thread overview: 6+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2021-07-13  5:52 fix memcpy_to_page and memzero_page Christoph Hellwig
2021-07-13  5:52 ` [PATCH 1/2] mm: call flush_dcache_page in " Christoph Hellwig
2021-07-14  1:31   ` Andrew Morton
2021-07-14  5:28     ` Christoph Hellwig
2021-07-14  8:09   ` Ira Weiny
2021-07-13  5:52 ` [PATCH 2/2] mm: use kmap_local_page in memzero_page Christoph Hellwig

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).