linux-kernel - [PATCH 0/2] Add BLK_FEAT_READ_SYNCHRONOUS and SWP_READ_SYNCHRONOUS

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: <20240919112952.981-1-qun-wei.lin@mediatek.com>
Date: Thu, 19 Sep 2024 19:29:50 +0800
From: Qun-Wei Lin <qun-wei.lin@...iatek.com>
To: Andrew Morton <akpm@...ux-foundation.org>, Matthias Brugger
	<matthias.bgg@...il.com>, AngeloGioacchino Del Regno
	<angelogioacchino.delregno@...labora.com>, Ryan Roberts
	<ryan.roberts@....com>, "Huang, Ying" <ying.huang@...el.com>, "David
 Hildenbrand" <david@...hat.com>, Chris Li <chrisl@...nel.org>, "Matthew
 Wilcox (Oracle)" <willy@...radead.org>, Al Viro <viro@...iv.linux.org.uk>,
	"Dan Schatzberg" <schatzberg.dan@...il.com>, Kairui Song
	<kasong@...cent.com>, Barry Song <baohua@...nel.org>, Jens Axboe
	<axboe@...nel.dk>
CC: <linux-kernel@...r.kernel.org>, <linux-mm@...ck.org>,
	<linux-arm-kernel@...ts.infradead.org>, <linux-mediatek@...ts.infradead.org>,
	<linux-block@...r.kernel.org>, Casper Li <casper.li@...iatek.com>, "Chinwen
 Chang" <chinwen.chang@...iatek.com>, Andrew Yang <andrew.yang@...iatek.com>,
	John Hsu <john.hsu@...iatek.com>, <wsd_upstream@...iatek.com>, Qun-Wei Lin
	<qun-wei.lin@...iatek.com>
Subject: [PATCH 0/2] Add BLK_FEAT_READ_SYNCHRONOUS and SWP_READ_SYNCHRONOUS_IO

This patchset introduces 2 new feature flags, BLK_FEAT_READ_SYNCHRONOUS and
SWP_READ_SYNCHRONOUS_IO.

These changes are motivated by the need to better accommodate certain swap
devices that support synchronous read operations but asynchronous write
operations.

The existing BLK_FEAT_SYNCHRONOUS and SWP_SYNCHRONOUS_IO flags are not
sufficient for these devices, as they enforce synchronous behavior for both
read and write operations.

Patch 1:
- introduce BLK_FEAT_READ_SYNCHRONOUS

Patch 2:
- introduce SWP_READ_SYNCHRONOUS_IO

Qun-Wei Lin (2):
  block: add BLK_FEAT_READ_SYNCHRONOUS feature for synchronous read
  mm, swap: introduce SWP_READ_SYNCHRONOUS_IO

 include/linux/blkdev.h |  8 ++++++++
 include/linux/swap.h   | 31 ++++++++++++++++---------------
 mm/memory.c            |  3 ++-
 mm/page_io.c           |  2 +-
 mm/swapfile.c          |  3 +++
 5 files changed, 30 insertions(+), 17 deletions(-)

-- 
2.45.2