From: "Theodore Ts'o" <tytso@mit.edu>
To: "陈涛涛 Taotao Chen" <chentaotao@didiglobal.com>
Cc: "hch@infradead.org" <hch@infradead.org>,
"adilger.kernel@dilger.ca" <adilger.kernel@dilger.ca>,
"willy@infradead.org" <willy@infradead.org>,
"brauner@kernel.org" <brauner@kernel.org>,
"jani.nikula@linux.intel.com" <jani.nikula@linux.intel.com>,
"rodrigo.vivi@intel.com" <rodrigo.vivi@intel.com>,
"tursulin@ursulin.net" <tursulin@ursulin.net>,
"airlied@gmail.com" <airlied@gmail.com>,
"linux-fsdevel@vger.kernel.org" <linux-fsdevel@vger.kernel.org>,
"linux-ext4@vger.kernel.org" <linux-ext4@vger.kernel.org>,
"linux-block@vger.kernel.org" <linux-block@vger.kernel.org>,
"intel-gfx@lists.freedesktop.org"
<intel-gfx@lists.freedesktop.org>,
"dri-devel@lists.freedesktop.org"
<dri-devel@lists.freedesktop.org>,
"linux-mm@kvack.org" <linux-mm@kvack.org>,
"linux-doc@vger.kernel.org" <linux-doc@vger.kernel.org>,
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Subject: Re: [PATCH v2 4/5] ext4: handle IOCB_DONTCACHE in buffered write path
Date: Wed, 25 Jun 2025 10:35:59 -0400 [thread overview]
Message-ID: <20250625143559.GE28249@mit.edu> (raw)
In-Reply-To: <20250624121149.2927-5-chentaotao@didiglobal.com>
On Tue, Jun 24, 2025 at 12:12:09PM +0000, 陈涛涛 Taotao Chen wrote:
> From: Taotao Chen <chentaotao@didiglobal.com>
>
> Add support for the IOCB_DONTCACHE flag in ext4_write_begin() and
> ext4_da_write_begin(). When set in the kiocb, the FGP_DONTCACHE bit
> is passed to the page cache lookup, preventing written pages from
> being retained in the cache.
>
> Only the handling logic is implemented here; the behavior remains
> inactive until ext4 advertises support via FOP_DONTCACHE.
>
> This change relies on prior patches that refactor the write_begin
> interface to use struct kiocb and introduce DONTCACHE handling in ext4.
>
> Part of a series refactoring address_space_operations write_begin and
> write_end callbacks to use struct kiocb for passing write context and
> flags.
>
> Signed-off-by: Taotao Chen <chentaotao@didiglobal.com>
Acked-by: Theodore Ts'o <tytso@mit.edu>
next prev parent reply other threads:[~2025-06-25 14:36 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-06-24 12:11 [PATCH v2 0/5] fs: refactor write_begin/write_end and add ext4 IOCB_DONTCACHE support 陈涛涛 Taotao Chen
2025-06-24 12:12 ` [PATCH v2 1/5] drm/i915: Use kernel_write() in shmem object create 陈涛涛 Taotao Chen
2025-06-24 12:23 ` Matthew Wilcox
2025-06-25 10:41 ` Chentaotao
2025-06-24 12:12 ` [PATCH v2 2/5] drm/i915: Refactor shmem_pwrite() to use kiocb and write_iter 陈涛涛 Taotao Chen
2025-06-24 12:12 ` [PATCH v2 3/5] fs: change write_begin/write_end interface to take struct kiocb * 陈涛涛 Taotao Chen
2025-06-24 12:51 ` Matthew Wilcox
2025-06-25 8:04 ` Christian Brauner
2025-06-27 2:40 ` Chen Taotao
2025-06-24 12:12 ` [PATCH v2 4/5] ext4: handle IOCB_DONTCACHE in buffered write path 陈涛涛 Taotao Chen
2025-06-25 14:35 ` Theodore Ts'o [this message]
2025-06-24 12:12 ` [PATCH v2 5/5] ext4: declare support for FOP_DONTCACHE 陈涛涛 Taotao Chen
2025-06-24 12:53 ` Matthew Wilcox
2025-06-25 10:46 ` Chen Taotao
2025-06-25 14:36 ` Theodore Ts'o
2025-06-24 12:54 ` [PATCH v2 0/5] fs: refactor write_begin/write_end and add ext4 IOCB_DONTCACHE support Matthew Wilcox
2025-06-25 6:56 ` hch
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