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Re: [Qemu-block] [PATCH v4 17/39] qcow2: Update l2_allocate() to support

From: Max Reitz
Subject: Re: [Qemu-block] [PATCH v4 17/39] qcow2: Update l2_allocate() to support L2 slices
Date: Mon, 5 Feb 2018 16:38:58 +0100
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.5.2

On 2018-02-05 15:33, Alberto Garcia wrote:
> This patch updates l2_allocate() to support the qcow2 cache returning
> L2 slices instead of full L2 tables.
> The old code simply gets an L2 table from the cache and initializes it
> with zeroes or with the contents of an existing table. With a cache
> that returns slices instead of tables the idea remains the same, but
> the code must now iterate over all the slices that are contained in an
> L2 table.
> Since now we're operating with slices the function can no longer
> return the newly-allocated table, so it's up to the caller to retrieve
> the appropriate L2 slice after calling l2_allocate() (note that with
> this patch the caller is still loading full L2 tables, but we'll deal
> with that in a separate patch).
> Signed-off-by: Alberto Garcia <address@hidden>
> Reviewed-by: Eric Blake <address@hidden>
> ---
>  block/qcow2-cluster.c | 56 
> +++++++++++++++++++++++++++++++--------------------
>  1 file changed, 34 insertions(+), 22 deletions(-)

Reviewed-by: Max Reitz <address@hidden>

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