linux-kernel - [PATCH v3 0/2] mm: batch free swaps for zap_pte

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-Id: <20240807215859.57491-1-21cnbao@gmail.com>
Date: Thu,  8 Aug 2024 09:58:57 +1200
From: Barry Song <21cnbao@...il.com>
To: akpm@...ux-foundation.org,
	linux-mm@...ck.org
Cc: chrisl@...nel.org,
	david@...hat.com,
	hughd@...gle.com,
	justinjiang@...o.com,
	kaleshsingh@...gle.com,
	kasong@...cent.com,
	linux-kernel@...r.kernel.org,
	ryan.roberts@....com,
	v-songbaohua@...o.com,
	ying.huang@...el.com
Subject: [PATCH v3 0/2] mm: batch free swaps for zap_pte_range()

From: Barry Song <v-songbaohua@...o.com>

Batch free swap slots for zap_pte_range(), making munmap three times
faster when the page table entries are filled with swap entries to
be freed. This is likely another advantage of using mTHP.

-v3:
  * collect David's acked-by for patch1/2
  * further refine the code per David;
  * fix a corner case which might leak swap slots, thanks for Kairui's
    comment.
-v2:
  https://lore.kernel.org/all/20240807082508.358322-1-21cnbao@gmail.com/
  * cleanup the name of the instances of swap_info_struct, per
    Andrew, David;
  * refine the code to add fallback in the batch free function,
    Thanks for David's suggestion.
-v1:
  https://lore.kernel.org/all/20240806012409.61962-1-21cnbao@gmail.com/

Barry Song (2):
  mm: rename instances of swap_info_struct to meaningful 'si'
  mm: attempt to batch free swap entries for zap_pte_range()

 mm/swapfile.c | 410 ++++++++++++++++++++++++++++----------------------
 1 file changed, 232 insertions(+), 178 deletions(-)

-- 
2.34.1