From: Christoph Hellwig <hch@infradead.org>
To: Andy Grover <agrover@redhat.com>
Cc: target-devel@vger.kernel.org, linux-scsi@vger.kernel.org
Subject: Re: [PATCH 13/15] target: Enforce 1 page max for control cdb buffer sizes
Date: Tue, 28 Jun 2011 16:15:51 -0400 [thread overview]
Message-ID: <20110628201551.GD9676@infradead.org> (raw)
In-Reply-To: <1309289377-8029-14-git-send-email-agrover@redhat.com>
On Tue, Jun 28, 2011 at 12:29:35PM -0700, Andy Grover wrote:
> Due to all cdbs' data buffers being referenced by scatterlists, buffers
> of more than a page are not contiguous. Instead of handling this in all
> control command handlers, we may be able to get away with just limiting
> control cdb data buffers to one page. The only control CDBs we handle that
> have potentially large data buffers are REPORT LUNS and UNMAP, so if we
> didn't want to live with this limitation, they would need to be modified
> to walk the pages in the data buffer's sgl.
I think this should be moved earlier in the series, that is before
making all control CDBs use SG lists.
next prev parent reply other threads:[~2011-06-28 20:15 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-06-28 19:29 [PATCH 0/15] Target updates for June 28 Andy Grover
2011-06-28 19:29 ` [PATCH 01/15] target: Remove ifdeffed code in t_g_process_write Andy Grover
2011-06-28 20:10 ` Christoph Hellwig
2011-06-28 20:50 ` Andy Grover
2011-06-28 19:29 ` [PATCH 02/15] target: Pass 2nd param of transport_split_cdb by value Andy Grover
2011-06-28 20:11 ` Christoph Hellwig
2011-06-28 19:29 ` [PATCH 03/15] target: Make all control CDBs scatter-gather Andy Grover
2011-06-28 20:22 ` Christoph Hellwig
2011-06-28 19:29 ` [PATCH 04/15] target: Disable rd_dr Andy Grover
2011-06-28 19:29 ` [PATCH 05/15] target: Eliminate usage of struct se_mem Andy Grover
2011-06-28 21:12 ` Christoph Hellwig
2011-06-28 23:22 ` Andy Grover
2011-06-28 19:29 ` [PATCH 06/15] target: Rename task_sg_num to task_sg_nents Andy Grover
2011-06-28 19:29 ` [PATCH 07/15] target: Remove custom debug macros for pr_debug. Use pr_err() Andy Grover
2011-06-28 19:29 ` [PATCH 08/15] target: Remove custom debug macros in non-iscsi fabrics Andy Grover
2011-06-28 19:29 ` [PATCH 09/15] target/iscsi: Remove iscsi_target_debug.h and usage of TRACE() & printk() Andy Grover
2011-06-28 19:29 ` [PATCH 10/15] target/iscsi: Remove SE_CMD macro Andy Grover
2011-06-28 19:29 ` [PATCH 11/15] target: WRITE_SAME_16 and WRITE_SAME_32 should be DATA_SG_IO cdbs Andy Grover
2011-06-28 20:14 ` Christoph Hellwig
2011-06-28 20:40 ` Andy Grover
2011-06-28 19:29 ` [PATCH 12/15] target: Set WSNZ=1 in block limits VPD. Abort if WRITE_SAME sectors = 0 Andy Grover
2011-06-28 19:29 ` [PATCH 13/15] target: Enforce 1 page max for control cdb buffer sizes Andy Grover
2011-06-28 20:15 ` Christoph Hellwig [this message]
2011-06-28 19:29 ` [PATCH 14/15] target: Remove direct ramdisk code Andy Grover
2011-06-28 21:15 ` Christoph Hellwig
2011-06-28 19:29 ` [PATCH 15/15] target: Remove transport do_se_mem_map callback Andy Grover
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