lkml.org 
[lkml]   [2020]   [Sep]   [28]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
Date
SubjectCan we remove the checking of CONFIG_ARCH_HAS_PTE_SPECIAL in __vm_insert_mixed?
Sorry, the previous email is corrupted. This is a resending.

In the current code, if the architecture supports PTE_SPECIAL,
__vm_insert_mixed() becomes a simple encapsulation of insert_pfn()
because it always calls insert_pfn() and never calls insert_page(). This
behavior is inconsistent with the function's name. As described in commit
423bad600443 ("mm: add vm_insert_mixed"), this function is designed to
supports _both_ raw pfns and pfns with struct page, but in architecture
with PTE_SPECIAL, it treats the latter as the former. So, I think we'd
better remove the checking of CONFIG_ARCH_HAS_PTE_SPECIAL to make the
behavior consistent for all architectures. If my understanding is right,
I can submit a patch to fix this. Thanks.

Regards,
Hao Lee

\
 
 \ /
  Last update: 2020-09-28 16:38    [W:0.016 / U:34.468 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site