[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

[win-pv-devel] [PATCH 0/9] Reduce xenstore noise on backend changes

Currently, each Pdo creates a single watch for its backend path,
but uses a single common thread event. This means that for any
backend path change, every backend area, for all VBDs, is scanned
for changes. This includes when the backend state variable is changed
which generates a lot of unneccesary xenstore traffic (mostly reads)
during VBD enumeration and connection.

Owen Smith (9):
  Move __FdoNotifyInstaller to DriverNotifyInstaller
  Simplify StorPort entry points
  Refactor Pnp/Power handlers
  Rework enumeration code to work at PASSIVE_LEVEL in the scan thread
  Dont create Pdo for emulated devices
  Create a seperate thread per VBD to handle backend change watches
  Wrap all driver.c globals in a struct
  Change enumeration function to take PANSI_STRING array to simplify
    parsing of the data returned by STORE(Directory)
  Remove logging from failed Pdo Pnp IRPs

 src/xenvbd/driver.c   | 333 +++++++++------------
 src/xenvbd/driver.h   |   8 +-
 src/xenvbd/fdo.c      | 794 ++++++++++++++++++++++----------------------------
 src/xenvbd/fdo.h      |  27 +-
 src/xenvbd/frontend.c |  54 +++-
 src/xenvbd/frontend.h |   7 -
 src/xenvbd/pdo.c      |  92 ++----
 src/xenvbd/pdo.h      |  10 +-
 8 files changed, 557 insertions(+), 768 deletions(-)


win-pv-devel mailing list



Lists.xenproject.org is hosted with RackSpace, monitoring our
servers 24x7x365 and backed by RackSpace's Fanatical Support®.