diff options
| author | Jamie Liu <jamieliu@google.com> | 2019-06-06 16:27:09 -0700 |
|---|---|---|
| committer | Shentubot <shentubot@google.com> | 2019-06-06 16:29:46 -0700 |
| commit | b3f104507d7a04c0ca058cbcacc5ff78d853f4ba (patch) | |
| tree | fb45110e8c9329b16165a92e67edb2c184de0dd6 /pkg/sentry/kernel/task.go | |
| parent | a26043ee53a2f38b81c9eaa098d115025e87f4c3 (diff) | |
"Implement" mbind(2).
We still only advertise a single NUMA node, and ignore mempolicy
accordingly, but mbind() at least now succeeds and has effects reflected
by get_mempolicy().
Also fix handling of nodemasks: round sizes to unsigned long (as
documented and done by Linux), and zero trailing bits when copying them
out.
PiperOrigin-RevId: 251950859
Diffstat (limited to 'pkg/sentry/kernel/task.go')
| -rw-r--r-- | pkg/sentry/kernel/task.go | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/pkg/sentry/kernel/task.go b/pkg/sentry/kernel/task.go index f9378c2de..4d889422f 100644 --- a/pkg/sentry/kernel/task.go +++ b/pkg/sentry/kernel/task.go @@ -455,12 +455,13 @@ type Task struct { // single numa node, all policies are no-ops. We only track this information // so that we can return reasonable values if the application calls // get_mempolicy(2) after setting a non-default policy. Note that in the - // real syscall, nodemask can be longer than 4 bytes, but we always report a - // single node so never need to save more than a single bit. + // real syscall, nodemask can be longer than a single unsigned long, but we + // always report a single node so never need to save more than a single + // bit. // // numaPolicy and numaNodeMask are protected by mu. numaPolicy int32 - numaNodeMask uint32 + numaNodeMask uint64 // If netns is true, the task is in a non-root network namespace. Network // namespaces aren't currently implemented in full; being in a network |