[libvirt] [PATCH RFC 0/2] Implement l3 CAT

This is a RFC patch to implement l3 CAT. There's old RFC V3 [1] patch, but don't get any attentions, reason maybe that it's is not a workable one. I address some of the comments for RFC V2 version from Martin. 1. Add file lock while access /sys/fs/resctrl base on kernel documents [3]. 2. Variable renaming. 3. Tested locally to create vm with cachetune defined and works well. Issues want to get some comments: I can not pass syntax-check as I reference the cache tune and cachebank definition (from conf/domain_conf.h). Since I need a complex struct to pass cachetune and host's cachetune information to resctrl. I can split patch if it's hard to review. Sorry for inconvient. Patch was pushed to github [4] for easing read. [1] https://www.redhat.com/archives/libvir-list/2017-June/msg00069.html [2] https://www.redhat.com/archives/libvir-list/2017-April/msg01466.html [3] https://www.kernel.org/doc/Documentation/x86/intel_rdt_ui.txt [4] https://github.com/taget/libvirt/commits/cache Eli Qiao (2): Resctrl: Add new xml element to support cache tune Resctrl: Add uitls functions to operate sysfs resctrl docs/schemas/domaincommon.rng | 54 ++ include/libvirt/virterror.h | 1 + src/Makefile.am | 1 + src/conf/domain_conf.c | 131 +++++ src/conf/domain_conf.h | 21 + src/libvirt_private.syms | 9 + src/qemu/qemu_process.c | 54 ++ src/util/virerror.c | 1 + src/util/virresctrl.c | 851 ++++++++++++++++++++++++++++++ src/util/virresctrl.h | 79 +++ tests/Makefile.am | 8 +- tests/virresctrldata/L3-free.schemata | 1 + tests/virresctrldata/L3CODE-free.schemata | 1 + tests/virresctrldata/L3DATA-free.schemata | 1 + tests/virresctrldata/linux-resctrl | 1 + tests/virresctrldata/linux-resctrl-cdp | 1 + tests/virresctrltest.c | 119 +++++ 17 files changed, 1333 insertions(+), 1 deletion(-) create mode 100644 src/util/virresctrl.c create mode 100644 src/util/virresctrl.h create mode 100644 tests/virresctrldata/L3-free.schemata create mode 100644 tests/virresctrldata/L3CODE-free.schemata create mode 100644 tests/virresctrldata/L3DATA-free.schemata create mode 120000 tests/virresctrldata/linux-resctrl create mode 120000 tests/virresctrldata/linux-resctrl-cdp create mode 100644 tests/virresctrltest.c -- 1.9.1