[
{
"PEBS": "1",
"EventCode": "0x04",
"Counter": "0,1",
"UMask": "0x8",
"EventName": "MEM_UOPS_RETIRED.DTLB_MISS_LOADS",
"SampleAfterValue": "200003",
"BriefDescription": "Counts the number of load micro-ops retired that cause a DTLB miss",
"Data_LA": "1"
},
{
"EventCode": "0x05",
"Counter": "0,1",
"UMask": "0x1",
"EventName": "PAGE_WALKS.D_SIDE_WALKS",
"SampleAfterValue": "100003",
"BriefDescription": "Counts the total D-side page walks that are completed or started. The page walks started in the speculative path will also be counted",
"EdgeDetect": "1"
},
{
"EventCode": "0x05",
"Counter": "0,1",
"UMask": "0x1",
"EventName": "PAGE_WALKS.D_SIDE_CYCLES",
"SampleAfterValue": "200003",
"BriefDescription": "Counts the total number of core cycles for all the D-side page walks. The cycles for page walks started in speculative path will also be included."
},
{
"EventCode": "0x05",
"Counter": "0,1",
"UMask": "0x2",
"EventName": "PAGE_WALKS.I_SIDE_WALKS",
"SampleAfterValue": "100003",
"BriefDescription": "Counts the total I-side page walks that are completed.",
"EdgeDetect": "1"
},
{
"PublicDescription": "This event counts every cycle when an I-side (walks due to an instruction fetch) page walk is in progress. ",
"EventCode": "0x05",
"Counter": "0,1",
"UMask": "0x2",
"EventName": "PAGE_WALKS.I_SIDE_CYCLES",
"SampleAfterValue": "200003",
"BriefDescription": "Counts the total number of core cycles for all the I-side page walks. The cycles for page walks started in speculative path will also be included."
},
{
"EventCode": "0x05",
"Counter": "0,1",
"UMask": "0x3",
"EventName": "PAGE_WALKS.WALKS",
"SampleAfterValue": "100003",
"BriefDescription": "Counts the total page walks that are completed (I-side and D-side)",
"EdgeDetect": "1"
},
{
"PublicDescription": "This event counts every cycle when a data (D) page walk or instruction (I) page walk is in progress.",
"EventCode": "0x05",
"Counter": "0,1",
"UMask": "0x3",
"EventName": "PAGE_WALKS.CYCLES",
"SampleAfterValue": "200003",
"BriefDescription": "Counts the total number of core cycles for all the page walks. The cycles for page walks started in speculative path will also be included."
}
]tion value='committer'>committer
cgroup: don't online subsystems before cgroup_name/path() are operational
While refactoring cgroup creation, a5bca2152036 ("cgroup: factor out
cgroup_create() out of cgroup_mkdir()") incorrectly onlined subsystems
before the new cgroup is associated with it kernfs_node. This is fine
for cgroup proper but cgroup_name/path() depend on the associated
kernfs_node and if a subsystem makes the new cgroup_subsys_state
visible, which they're allowed to after onlining, it can lead to NULL
dereference.
The current code performs cgroup creation and subsystem onlining in
cgroup_create() and cgroup_mkdir() makes the cgroup and subsystems
visible afterwards. There's no reason to online the subsystems early
and we can simply drop cgroup_apply_control_enable() call from
cgroup_create() so that the subsystems are onlined and made visible at
the same time.
Signed-off-by: Tejun Heo <tj@kernel.org>
Reported-by: Konstantin Khlebnikov <khlebnikov@yandex-team.ru>
Fixes: a5bca2152036 ("cgroup: factor out cgroup_create() out of cgroup_mkdir()")
Cc: stable@vger.kernel.org # v4.6+