From: Martin Wilck <mwilck@suse.com>
To: Benjamin Marzinski <bmarzins@redhat.com>,
device-mapper development <dm-devel@redhat.com>
Subject: Re: [PATCH 01/12] multipath: add "ghost_delay" parameter
Date: Thu, 07 Dec 2017 23:08:09 +0100 [thread overview]
Message-ID: <1512684489.22250.1.camel@suse.com> (raw)
In-Reply-To: <1512672546-12785-2-git-send-email-bmarzins@redhat.com>
On Thu, 2017-12-07 at 12:48 -0600, Benjamin Marzinski wrote:
> If the lower-priority passive paths for a multipath device appear
> first,
> IO can go to them and cause the hardware handler to activate them,
> before the higher priority paths appear, causing the devices to
> failback. Setting the "ghost_delay" parameter to a value greater than
> 0 can avoid this ping-ponging by causing udev to not mark the device
> as
> Ready after its initial creation until either an active path appears,
> or ghost_delay seconds have passed. Multipathd does this by setting
> the MPATH_UDEV_NO_PATHS_FLAG.
>
> Signed-off-by: Benjamin Marzinski <bmarzins@redhat.com>
Reviewed-by: Martin Wilck <mwilck@suse.com>
--
Dr. Martin Wilck <mwilck@suse.com>, Tel. +49 (0)911 74053 2107
SUSE Linux GmbH, GF: Felix Imendörffer, Jane Smithard, Graham Norton
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next prev parent reply other threads:[~2017-12-07 22:08 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-12-07 18:48 [PATCH 00/12] Misc fixes Benjamin Marzinski
2017-12-07 18:48 ` [PATCH 01/12] multipath: add "ghost_delay" parameter Benjamin Marzinski
2017-12-07 22:08 ` Martin Wilck [this message]
2017-12-07 18:48 ` [PATCH 02/12] kpartx: don't delete partitions from partitions Benjamin Marzinski
2017-12-07 22:09 ` Martin Wilck
2017-12-07 18:48 ` [PATCH 03/12] multipath: fix hwhandler check in select_action Benjamin Marzinski
2017-12-07 22:09 ` Martin Wilck
2017-12-07 18:48 ` [PATCH 04/12] libmultipath: cleanup features handling code Benjamin Marzinski
2017-12-07 22:10 ` Martin Wilck
2017-12-08 15:24 ` Martin Wilck
2017-12-08 21:12 ` Benjamin Marzinski
2017-12-07 18:48 ` [PATCH 05/12] multipathd: move helper functions to libmultipath Benjamin Marzinski
2017-12-07 22:11 ` Martin Wilck
2017-12-07 18:49 ` [PATCH 06/12] multipathd: fix device creation issues Benjamin Marzinski
2017-12-08 17:26 ` Martin Wilck
2018-01-30 16:51 ` Martin Wilck
2018-01-30 18:34 ` Benjamin Marzinski
2018-01-30 19:02 ` Martin Wilck
2017-12-07 18:49 ` [PATCH 07/12] multipathd: remove select_* from setup_multipath Benjamin Marzinski
2017-12-08 20:08 ` Martin Wilck
2017-12-07 18:49 ` [PATCH 08/12] libmultipath: __setup_multipath param cleanup Benjamin Marzinski
2017-12-08 20:13 ` Martin Wilck
2017-12-07 18:49 ` [PATCH 09/12] multipathd: move recovery mode code to function Benjamin Marzinski
2017-12-07 22:13 ` Martin Wilck
2017-12-07 18:49 ` [PATCH 10/12] multipathd: clean up set_no_path_retry Benjamin Marzinski
2017-12-07 22:14 ` Martin Wilck
2017-12-07 18:49 ` [PATCH 11/12] multipath: check failed path dmstate in check_path Benjamin Marzinski
2017-12-07 22:14 ` Martin Wilck
2017-12-07 18:49 ` [PATCH 12/12] multipathd: marginal path code fixes Benjamin Marzinski
2017-12-07 22:15 ` Martin Wilck
2018-01-13 9:19 ` [PATCH 00/12] Misc fixes Christophe Varoqui
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