linux-kernel - Re: [PATCH 2/4] fs: return writeback errors for IOCB_DONTCACHE in generic_write

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Message-ID: <20251104155314.GA1056@lst.de>
Date: Tue, 4 Nov 2025 16:53:14 +0100
From: Christoph Hellwig <hch@....de>
To: "Nirjhar Roy (IBM)" <nirjhar.roy.lists@...il.com>
Cc: Christoph Hellwig <hch@....de>, "Darrick J. Wong" <djwong@...nel.org>,
	Carlos Maiolino <cem@...nel.org>,
	Christian Brauner <brauner@...nel.org>, Jan Kara <jack@...e.cz>,
	"Martin K. Petersen" <martin.petersen@...cle.com>,
	linux-kernel@...r.kernel.org, linux-xfs@...r.kernel.org,
	linux-fsdevel@...r.kernel.org, linux-raid@...r.kernel.org,
	linux-block@...r.kernel.org
Subject: Re: [PATCH 2/4] fs: return writeback errors for IOCB_DONTCACHE in
 generic_write_sync

On Tue, Nov 04, 2025 at 05:34:50PM +0530, Nirjhar Roy (IBM) wrote:
> So, what you are saying is file_check_and_advance_wb_err() will
> wait/block till the write back request done in
> filemap_fdatawrite_range_kick() is completely submitted

No, it won't wait.  But filemap_fdatawrite_range_kick isn't asynchronous,
so it doesn't have to wait either.