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Migrating a task to a CPU which is concurrently being taken offline can cause the migration to fail silently, with the task left running on the old CPU. This is usually not the end of the world, but when forcefully migrating a 32-bit task during execve() from a 64-bit task, it is imperative that we do not attempt to return to userspace on a 64-bit-only CPU. Take the CPU hotplug lock for read while forcefully migrating a 32-bit task on execve() so that the migration cannot fail. Bug: 187917024 Change-Id: I6eaf2a564fe3ad73c03f0a6029aade09c707330f Signed-off-by: Will Deacon <willdeacon@google.com> |
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| .. | ||
| autogroup.c | ||
| autogroup.h | ||
| clock.c | ||
| completion.c | ||
| core.c | ||
| cpuacct.c | ||
| cpudeadline.c | ||
| cpudeadline.h | ||
| cpufreq_schedutil.c | ||
| cpufreq.c | ||
| cpupri.c | ||
| cpupri.h | ||
| cputime.c | ||
| deadline.c | ||
| debug.c | ||
| fair.c | ||
| features.h | ||
| idle.c | ||
| isolation.c | ||
| loadavg.c | ||
| Makefile | ||
| membarrier.c | ||
| OWNERS | ||
| pelt.c | ||
| pelt.h | ||
| psi.c | ||
| rt.c | ||
| sched-pelt.h | ||
| sched.h | ||
| smp.h | ||
| stats.c | ||
| stats.h | ||
| stop_task.c | ||
| swait.c | ||
| topology.c | ||
| wait_bit.c | ||
| wait.c | ||