lkml.org 
[lkml]   [2019]   [Jul]   [31]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
Subject[PATCH v2 0/2] khugepaged: collapse pmd for pte-mapped THP
Date
Changes v1 => v2:
1. Call collapse_pte_mapped_thp() directly from uprobe_write_opcode();
2. Add VM_BUG_ON() for addr alignment in khugepaged_add_pte_mapped_thp()
and collapse_pte_mapped_thp().

This set is the newer version of 5/6 and 6/6 of [1]. Newer version of
1-4 of the work [2] was recently picked by Andrew.

Patch 1 enables khugepaged to handle pte-mapped THP. These THPs are left
in such state when khugepaged failed to get exclusive lock of mmap_sem.

Patch 2 leverages work in 1 for uprobe on THP. After [2], uprobe only
splits the PMD. When the uprobe is disabled, we get pte-mapped THP.
After this set, these pte-mapped THP will be collapsed as pmd-mapped.

[1] https://lkml.org/lkml/2019/6/23/23
[2] https://www.spinics.net/lists/linux-mm/msg185889.html

Song Liu (2):
khugepaged: enable collapse pmd for pte-mapped THP
uprobe: collapse THP pmd after removing all uprobes

include/linux/khugepaged.h | 12 ++++
kernel/events/uprobes.c | 9 +++
mm/khugepaged.c | 138 +++++++++++++++++++++++++++++++++++++
3 files changed, 159 insertions(+)

--
2.17.1

\
 
 \ /
  Last update: 2019-07-31 20:35    [W:1.210 / U:0.008 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site