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Re: [dm-devel] [PATCH 0/2] multipath: Stop extra scans on stacked devices



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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