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

[Christophe Varoqui]

Thanks for the reminder.

This set is applied.


On Tue, Mar 11, 2014 at 5:34 PM, Xose Vazquez Perez
<xose.vazquez at gmail.com> wrote:
> 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.