Date: Fri, 19 Oct 2012 14:11:03 -0400
From: Vivek Goyal <vgoyal@redhat.com>
To: Kent Overstreet <koverstreet@google.com>
Cc: linux-bcache@vger.kernel.org, linux-kernel@vger.kernel.org,
        dm-devel@redhat.com, tj@kernel.org, axboe@kernel.dk,
        martin.petersen@oracle.com
Subject: Re: [PATCH v4 2/2] block: Convert integrity to bvec_alloc_bs()
Message-ID: <20121019181103.GH27052@redhat.com>
References: <1350331769-14856-1-git-send-email-koverstreet@google.com>
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On Mon, Oct 15, 2012 at 01:09:02PM -0700, Kent Overstreet wrote:
> This adds a pointer to the bvec array to struct bio_integrity_payload,
> instead of the bvecs always being inline; then the bvecs are allocated
> with bvec_alloc_bs().
> 
> Changed bvec_alloc_bs() and bvec_free_bs() to take a pointer to a
> mempool instead of the bioset, so that bio integrity can use a different
> mempool for its bvecs, and thus avoid a potential deadlock.
> 
> This is eventually for immutable bio vecs - immutable bvecs aren't
> useful if we still have to copy them, hence the need for the pointer.
> Less code is always nice too, though.

I think this patch should be part of your immutable prep work series or
later series. First patch is the stand alone fix for bio integrity for
bio_split() case. I would say post that separately and hopefully martin
likes it and acks it. It is simple enough and looks right to me though.

Thanks
Vivek
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