From: FUJITA Tomonori <tomof@acm.org>
Date: Sat, 14 Jan 2006 00:05:44 +0000 (-0600)
Subject: [SCSI] iscsi: data digest page cache usage fix
X-Git-Tag: v2.6.16-rc1~162^2~19
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=56851698c23430f0f291d6e50da344e6b414f3b9;p=pandora-kernel.git

[SCSI] iscsi: data digest page cache usage fix

Users can write to a page while we are sending it and making
digest calculations. This ends up causing us to retry the command
when a digest error is later reported. By using sock_no_sendpage
when data digests are calculated we can avoid a lot of (not all but it
helps) the retries becuase sock_no_sendpage is not zero copy.

Signed-off-by: Alex Aizman <itn780@yahoo.com>
Signed-off-by: Dmitry Yusupov <dmitry_yus@yahoo.com>
Signed-off-by: Mike Christie <michaelc@cs.wisc.edu>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
---

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