linux-kernel - Re: [dm-devel] [PATCH v10 1/8] block: Generalized bio pool freeing

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Message-ID: <20120914182828.GK15728@agk-dp.fab.redhat.com>
Date:	Fri, 14 Sep 2012 19:28:28 +0100
From:	Alasdair G Kergon <agk@...hat.com>
To:	Kent Overstreet <koverstreet@...gle.com>
Cc:	linux-bcache@...r.kernel.org, linux-kernel@...r.kernel.org,
	dm-devel@...hat.com, Jens Axboe <axboe@...nel.dk>,
	Lars Ellenberg <lars.ellenberg@...bit.com>,
	Hannes Reinecke <hare@...e.de>
Subject: Re: [dm-devel] [PATCH v10 1/8] block: Generalized bio pool freeing

On Thu, Sep 06, 2012 at 03:34:55PM -0700, Kent Overstreet wrote:
> With the old code, when you allocate a bio from a bio pool you have to
> implement your own destructor that knows how to find the bio pool the
> bio was originally allocated from.
> 
> This adds a new field to struct bio (bi_pool) and changes
> bio_alloc_bioset() to use it. This makes various bio destructors
> unnecessary, so they're then deleted.
> 
> v6: Explain the temporary if statement in bio_put
 
This patch also silently reverts 
commit 4d7b38b7d944a79da3793b6c92d38682f3905ac9
"dm: clear bi_end_io on remapping failure"

Why?

If it's intentional, please explain it in your patch header and
copy Hannes to reconsider the matter.

If it wasn't intentional, please reinstate it.

Alasdair

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