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| author | Rickard Green <[email protected]> | 2014-08-07 22:02:25 +0200 |
|---|---|---|
| committer | Rickard Green <[email protected]> | 2014-08-07 23:45:59 +0200 |
| commit | 18c03b13d1a53282e69160fa71a7195a11e84392 (patch) | |
| tree | f2d65d851546d4d2af7a65f9dcd33eb0a5cb5933 /EPLICENCE | |
| parent | 1cbd897c43f0dab1275392a3736e4629c1f80243 (diff) | |
| download | otp-18c03b13d1a53282e69160fa71a7195a11e84392.tar.gz otp-18c03b13d1a53282e69160fa71a7195a11e84392.tar.bz2 otp-18c03b13d1a53282e69160fa71a7195a11e84392.zip | |
Fix emigrate bug in erts_port_task_schedule()
While current run-queue lock is unlocked in the call to
erts_check_emigration_need() from erts_port_task_schedule() the
port can be migrated to another run-queue by another thread.
The code in erts_port_task_schedule() needs to check if this
has occurred when returning from erts_check_emigration_need(), and
if so respect the migration decision. When this was not done,
the thread calling erts_port_task_schedule() held the wrong
run-queue lock which caused invalid updates of the port task queue.
This bug was automatically fixed by the rewrites in the branch
rickard/r16b/port-optimizations-fixes/OTP-10336 (commit
56cef897ca3ad2377e34a6ea5800a54a28cbeb6e) introduced in erts-5.10
and do not effect erts versions after that.
Diffstat (limited to 'EPLICENCE')
0 files changed, 0 insertions, 0 deletions