[dm-devel] [PATCH 0/2] multipath: Stop extra scans on stacked devices
Xose Vazquez Perez
xose.vazquez at gmail.com
Tue Mar 11 16:34:06 UTC 2014
On 02/12/2014 Benjamin Marzinski wrote:
> Whenever there is a DM_DEVICE_RESUME ioctl, a uevent is generated. Right now,
> when multipath is reloading existing devices do to paths going or coming,
> lvmetad will rescan those devices. This is unnecessary, and can cause a lot
> of overhead. Also, multipath devices with no working paths will get scanned.
> These patches make multipath set a new flag, DM_SUBSYSTEM_UDEV_FLAG0, when it
> is reloading devices due to path changes, and lvmetad can safely ignore it.
> They also add a new udev rules file, 11-dm-mpath.rules, to disable scanning
> when it would not be useful.
>
> Benjamin Marzinski (2):
> New udev rules to deal with stacked devices
> Mark reloads with udev flag
>
> Makefile.inc | 1 +
> kpartx/devmapper.c | 4 ++--
> kpartx/devmapper.h | 8 +++++++-
> kpartx/kpartx.c | 8 ++++----
> libmultipath/configure.c | 4 ++--
> libmultipath/devmapper.c | 26 ++++++++++++++------------
> libmultipath/devmapper.h | 10 ++++++++--
> multipath/11-dm-mpath.rules | 34 ++++++++++++++++++++++++++++++++++
> multipath/Makefile | 3 +++
> multipathd/cli_handlers.c | 4 ++--
> 10 files changed, 77 insertions(+), 25 deletions(-)
> create mode 100644 multipath/11-dm-mpath.rules
This set is missing in git.
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