[libvirt] [PATCH 0/4] Add caching of QEMU probed capabilities

[Daniel P. Berrange]

Probing capabilities takes 200-300ms per binary and we have as many
as 26 binaries. This noticably slows down libvirtd startup. It does
not look like performance of probing QEMU can be improved, so this
series introduces caching of the capabilities information. So the
first time libvirtd starts it'll be slow, but thereafter it is fast.
The cache is invalidated any time the QEMU binary timestamp changes
or the libvirtd binary or driver module timestamp changes.

Daniel P. Berrange (4):
  Add helper APIs for generating cryptographic hashes
  Convert lock driver plugins to use new crypto APIs
  Cache result of QEMU capabilities extraction
  Refresh qemu capabilities if libvirtd binary changes

 .gitignore                        |   1 +
 daemon/libvirtd.c                 |   2 +
 include/libvirt/virterror.h       |   1 +
 po/POTFILES.in                    |   1 +
 src/Makefile.am                   |   1 +
 src/driver.c                      |   2 +
 src/libvirt_private.syms          |   6 +
 src/locking/lock_driver_lockd.c   |  32 +--
 src/locking/lock_driver_sanlock.c |  42 +---
 src/qemu/qemu_capabilities.c      | 418 +++++++++++++++++++++++++++++++++++++-
 src/qemu/qemu_capabilities.h      |   2 +
 src/qemu/qemu_driver.c            |   1 +
 src/util/vircrypto.c              |  80 ++++++++
 src/util/vircrypto.h              |  40 ++++
 src/util/virerror.c               |   1 +
 src/util/virutil.c                |  23 +++
 src/util/virutil.h                |   4 +
 tests/Makefile.am                 |   5 +
 tests/vircryptotest.c             |  90 ++++++++
 19 files changed, 682 insertions(+), 70 deletions(-)
 create mode 100644 src/util/vircrypto.c
 create mode 100644 src/util/vircrypto.h
 create mode 100644 tests/vircryptotest.c

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1.8.5.3