linux-ext4 - Re: [PATCH] ext4: Retry block allocation for failed DIO and DAX writes

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Message-ID: <20160401060635.GB29897@thunk.org>
Date:	Fri, 1 Apr 2016 02:06:35 -0400
From:	Theodore Ts'o <tytso@....edu>
To:	Jan Kara <jack@...e.cz>
Cc:	linux-ext4@...r.kernel.org
Subject: Re: [PATCH] ext4: Retry block allocation for failed DIO and DAX
 writes

On Mon, Mar 21, 2016 at 02:12:26PM +0100, Jan Kara wrote:
> Currently if block allocation for DIO or DAX write fails due to ENOSPC,
> we just returned it to userspace. However these ENOSPC errors can be
> transient because the transaction freeing blocks has not yet committed.
> This demonstrates as failures of generic/102 test when the filesystem is
> mounted with 'dax' mount option.
> 
> Fix the problem by properly retrying the allocation in case of ENOSPC
> error in get blocks functions used for direct IO.
> 
> Signed-off-by: Jan Kara <jack@...e.cz>

Thanks, applied.

						- Ted
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