From: Jens Axboe <axboe@suse.de>
To: Kai Makisara <Kai.Makisara@kolumbus.fi>
Cc: matthew@wil.cx, linux-scsi@vger.kernel.org
Subject: Re: [PATCH] SCSI sym53c8xx_2: bigger transfer limits
Date: Wed, 1 Mar 2006 16:29:29 +0100 [thread overview]
Message-ID: <20060301152929.GZ4816@suse.de> (raw)
In-Reply-To: <Pine.LNX.4.63.0602282104040.6272@kai.makisara.local>
On Tue, Feb 28 2006, Kai Makisara wrote:
> This patch enables clustering and sets max_sectors to 0xffff to enable
> reading and writing of large blocks with tapes (and large transfers with
> sg). This change is needed after the sg and st drivers started using
> chained bios through scsi_request_async() in 2.6.16.
>
> Signed-off-by: Kai Makisara <kai.makisara@kolumbus.fi>
>
> --- linux-2.6.16-rc5/drivers/scsi/sym53c8xx_2/sym_glue.c 2006-02-04 13:25:48.000000000 +0200
> +++ linux-2.6.16-rc5-k1/drivers/scsi/sym53c8xx_2/sym_glue.c 2006-02-18 09:45:24.000000000 +0200
> @@ -1978,7 +1978,8 @@ static struct scsi_host_template sym2_te
> .eh_bus_reset_handler = sym53c8xx_eh_bus_reset_handler,
> .eh_host_reset_handler = sym53c8xx_eh_host_reset_handler,
> .this_id = 7,
> - .use_clustering = DISABLE_CLUSTERING,
> + .use_clustering = ENABLE_CLUSTERING,
> + .max_sectors = 0xFFFF,
Strictly speaking, the clustering bit is unrelated. I seem to recall
Gerard years ago talking about some sym chips that did not like
clustering, hence it was disabled.
--
Jens Axboe
next prev parent reply other threads:[~2006-03-01 15:29 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-02-28 19:14 [PATCH] SCSI sym53c8xx_2: bigger transfer limits Kai Makisara
2006-02-28 20:41 ` Matthew Wilcox
2006-03-01 15:29 ` Jens Axboe [this message]
2006-03-01 15:39 ` James Bottomley
2006-03-01 15:54 ` Jens Axboe
2006-03-01 16:00 ` Douglas Gilbert
2006-03-01 16:11 ` Jens Axboe
2006-03-01 16:17 ` James Bottomley
2006-03-01 20:34 ` Kai Makisara
2006-03-01 20:43 ` Jens Axboe
2006-03-01 22:24 ` Kai Makisara
2006-03-02 3:57 ` Matthew Wilcox
2006-03-02 7:29 ` Jens Axboe
2006-03-04 8:16 ` Kai Makisara
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