linux-kernel - [RFC][PATCH 8/10] I/O context inheritance

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Message-Id: <20080422.225823.95333470.taka@valinux.co.jp>
Date:	Tue, 22 Apr 2008 22:58:23 +0900 (JST)
From:	Hirokazu Takahashi <taka@...inux.co.jp>
To:	jens.axboe@...cle.com, agk@...rceware.org
Cc:	dm-devel@...hat.com, linux-kernel@...r.kernel.org
Subject: [RFC][PATCH 8/10] I/O context inheritance


The crypt module will duplicate a given bio in its own way, so the newly
allocated bio should inherit the the io_context from the original one.

Signed-off-by: Hirokazu Takahashi <taka@...inux.co.jp>


--- linux-2.6.25.bio0/drivers/md/dm-crypt.c	2008-04-22 15:48:36.000000000 +0900
+++ linux-2.6.25/drivers/md/dm-crypt.c	2008-04-22 15:53:28.000000000 +0900
@@ -581,6 +581,7 @@ static void clone_init(struct dm_crypt_i
 	clone->bi_end_io  = crypt_endio;
 	clone->bi_bdev    = cc->dev->bdev;
 	clone->bi_rw      = io->base_bio->bi_rw;
+	clone->bi_io_context = ioc_object_link(io->base_bio->bi_io_context);
 	clone->bi_destructor = dm_crypt_bio_destructor;
 }
 

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