linux-kernel - Re: [PATCH v2 0/5] fs: refactor write_begin/write_end and add ext4 IOCB

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

Message-ID: <aFqf8sbGsQ0kEme3@casper.infradead.org>
Date: Tue, 24 Jun 2025 13:54:10 +0100
From: Matthew Wilcox <willy@...radead.org>
To: 陈涛涛 Taotao Chen <chentaotao@...iglobal.com>
Cc: "tytso@....edu" <tytso@....edu>,
	"hch@...radead.org" <hch@...radead.org>,
	"adilger.kernel@...ger.ca" <adilger.kernel@...ger.ca>,
	"brauner@...nel.org" <brauner@...nel.org>,
	"jani.nikula@...ux.intel.com" <jani.nikula@...ux.intel.com>,
	"rodrigo.vivi@...el.com" <rodrigo.vivi@...el.com>,
	"tursulin@...ulin.net" <tursulin@...ulin.net>,
	"airlied@...il.com" <airlied@...il.com>,
	"linux-fsdevel@...r.kernel.org" <linux-fsdevel@...r.kernel.org>,
	"linux-ext4@...r.kernel.org" <linux-ext4@...r.kernel.org>,
	"linux-block@...r.kernel.org" <linux-block@...r.kernel.org>,
	"intel-gfx@...ts.freedesktop.org" <intel-gfx@...ts.freedesktop.org>,
	"dri-devel@...ts.freedesktop.org" <dri-devel@...ts.freedesktop.org>,
	"linux-mm@...ck.org" <linux-mm@...ck.org>,
	"linux-doc@...r.kernel.org" <linux-doc@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"chentao325@...com" <chentao325@...com>
Subject: Re: [PATCH v2 0/5] fs: refactor write_begin/write_end and add ext4
 IOCB_DONTCACHE support

On Tue, Jun 24, 2025 at 12:11:59PM +0000, 陈涛涛 Taotao Chen wrote:
> From: Taotao Chen <chentaotao@...iglobal.com>
> 
> This patch series refactors the address_space_operations write_begin()
> and write_end() callbacks to take struct kiocb * as their first argument,
> allowing IOCB flags such as IOCB_DONTCACHE to propagate to filesystem’s
> buffered write path.
> 
> Ext4 is updated to implement handling of the IOCB_DONTCACHE flag in its
> buffered write path and to advertise support via the FOP_DONTCACHE file
> operation flag.
> 
> Additionally, the i915 driver’s shmem write paths are updated to bypass
> the legacy write_begin/write_end interface in favor of directly calling
> write_iter(), using a constructed synchronous kiocb. Another i915 patch
> replaces a manual write loop with kernel_write() in shmem object creation.

Thanks, this is a really good cleanup.