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From: Bernd Schubert <bs_lists-ivAEE9vf7JuUmYeGgvxl9AC/G2K4zDHf@public.gmane.org>
To: general-ZwoEplunGu1OwGhvXhtEPSCwEArCW2h5@public.gmane.org
Cc: linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
	Bernd Schubert <bschubert-LfVdkaOWEx8@public.gmane.org>
Subject: srp sg_tablesize
Date: Fri, 20 Aug 2010 09:49:54 +0200	[thread overview]
Message-ID: <201008200949.54595.bs_lists@aakef.fastmail.fm> (raw)

In ib_srp.c sg_tablesize is defined as 255. With that value we see lots of IO 
requests of size 1020. As I already wrote on linux-scsi, that is really sub-
optimal for DDN storage, as lots of IO requests of size 1020 come up.

Now the question is if we can safely increase it. Is there somewhere a 
definition what is the real hardware supported size? And shouldn't we increase 
sg_tablesize, but also set the .dma_boundary value?


Thanks in advance,
Bernd


-- 
Bernd Schubert
DataDirect Networks
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             reply	other threads:[~2010-08-20  7:49 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2010-08-20  7:49 Bernd Schubert [this message]
     [not found] ` <201008200949.54595.bs_lists-ivAEE9vf7JuUmYeGgvxl9AC/G2K4zDHf@public.gmane.org>
2010-08-20 14:15   ` srp sg_tablesize David Dillow
     [not found]     ` <1282313740.7441.25.camel-FqX9LgGZnHWDB2HL1qBt2PIbXMQ5te18@public.gmane.org>
2010-08-24 19:47       ` Bernd Schubert
     [not found]         ` <201008242147.50692.bs_lists-ivAEE9vf7JuUmYeGgvxl9AC/G2K4zDHf@public.gmane.org>
2010-08-24 20:23           ` David Dillow
2010-08-21 11:14   ` Bart Van Assche
     [not found]     ` <AANLkTimMoyEpfYPFSLLqS9ZCg3VyyOQcd4i2zzCQjHMN-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2010-08-21 16:27       ` David Dillow
     [not found]         ` <1282408043.20840.13.camel-1q1vX8mYZiGLUyTwlgNVppKKF0rrzTr+@public.gmane.org>
2010-08-21 17:28           ` Bart Van Assche
     [not found]             ` <AANLkTimFS=QkHd9+393mS1gQ5ZnL79jSDQaUZ8C_Xd2A-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2010-08-21 18:20               ` Bernd Schubert
     [not found]                 ` <201008212020.55028.bs_lists-ivAEE9vf7JuUmYeGgvxl9AC/G2K4zDHf@public.gmane.org>
2010-08-21 20:50                   ` David Dillow
2010-08-22  7:15                   ` Bart Van Assche
2010-08-21 20:38               ` David Dillow
2010-08-21 18:04           ` Bernd Schubert

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