From: Alasdair G Kergon Date: Thu, 10 Dec 2009 23:52:23 +0000 (+0000) Subject: dm: bind new table before destroying old X-Git-Tag: v2.6.33-rc1~75^2~23 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=a794015597a2d9b437470c7692aac77e5fc08cd2;p=pandora-kernel.git dm: bind new table before destroying old When replacing a mapped device's table during a 'resume', delay the destruction of the old table until the new one is successfully in place. This will make it easier for a later patch to transfer internal state information from the old table to the new one (something we do not currently support) while giving us more options for reversion if a later part of the operation fails. Devices are always in the suspended state during dm_swap_table(). This patch reinforces the requirement that all I/O must have been flushed from the table targets while in this state (including any in workqueues). In the case of 'noflush' suspending, unprocessed I/O should have been 'pushed back' to the dm core prior to this point, for resubmission after the new table is in place. Signed-off-by: Alasdair G Kergon --- Reading git-diff-tree failed