linux-kernel - [PATCH v3 0/3] Cleanup and fixups for vmemmap handling

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Date:   Thu,  4 Feb 2021 14:43:22 +0100
From:   Oscar Salvador <osalvador@...e.de>
To:     akpm@...ux-foundation.org
Cc:     David Hildenbrand <david@...hat.com>,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        Andy Lutomirski <luto@...nel.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        x86@...nel.org, "H . Peter Anvin" <hpa@...or.com>,
        Michal Hocko <mhocko@...nel.org>, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org, Oscar Salvador <osalvador@...e.de>
Subject: [PATCH v3 0/3] Cleanup and fixups for vmemmap handling

Hi,

this series contains cleanups to remove dead code that handles
unaligned cases for 4K and 1GB pages (patch#1 and pathc#2) when
removing the vemmmap range, and a fix (patch#3) to handle the case
when two vmemmap ranges intersect a PMD.

More details can be found in the respective changelogs.

 v2 -> v3:
 - Make sure we do not clear the PUD entry in case
   we are not removing the whole range.
 - Add Reviewed-by

 v1 -> v2:
 - Remove dead code in remove_pud_table as well
 - Addessed feedback by David
 - Place the vmemap functions that take care of unaligned PMDs
   within CONFIG_SPARSEMEM_VMEMMAP

Oscar Salvador (3):
  x86/vmemmap: Drop handling of 4K unaligned vmemmap range
  x86/vmemmap: Drop handling of 1GB vmemmap ranges
  x86/vmemmap: Handle unpopulated sub-pmd ranges

 arch/x86/mm/init_64.c | 189 ++++++++++++++++++++++++++----------------
 1 file changed, 118 insertions(+), 71 deletions(-)

-- 
2.26.2