linux-kernel - Re: [PATCH 10/13] iscsi-target: Add iSCSI Error Recovery Hierarchy support

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Message-ID: <CAJAFBLCgOeqnrPae+GQyjnoOUkF632Nrn4Bh-3d4K3KXCezbqw@mail.gmail.com>
Date:	Thu, 28 Jul 2011 13:42:11 +0200
From:	Fubo Chen <fubo.chen@...il.com>
To:	linux-iscsi-target-dev@...glegroups.com
Cc:	target-devel <target-devel@...r.kernel.org>,
	linux-scsi <linux-scsi@...r.kernel.org>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	Christoph Hellwig <hch@....de>,
	Andy Grover <agrover@...hat.com>,
	Hannes Reinecke <hare@...e.de>,
	Roland Dreier <roland@...estorage.com>,
	James Bottomley <James.Bottomley@...senpartnership.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Nicholas Bellinger <nab@...ux-iscsi.org>
Subject: Re: [PATCH 10/13] iscsi-target: Add iSCSI Error Recovery Hierarchy support

On Sat, Jul 23, 2011 at 10:45 AM, Nicholas A. Bellinger
<nab@...ux-iscsi.org> wrote:
> This patch adds support for RFC-3720 compatiable ErrorRecoveryLevel
> support as defined in Section 6.1.5.  Error Recovery Hierarchy.
>
> This includes support for iSCSI session reinstatement, iSCSI within
> command and within connection recovery, and explict/implict connection
> recovery (CSM-E and CSM-I) from state machines in Section 7 of RFC-3720.
>
> These functions are called from iscsi_target.c to handle processing
> based on the negotiated session-wide ErrorRecoveryLevel parameter.
>
> Signed-off-by: Nicholas A. Bellinger <nab@...ux-iscsi.org>

This is interesting. Is ERL2 similar to md ? If so, when should I use
md and when ERL2 ?

Thanks,

Fubo.
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