Opened 10 years ago

Closed 9 years ago

#549 closed defect (notadefect)

Atomic operations are not SMP-safe

Reported by: Jakub Jermář Owned by: Jakub Jermář
Priority: major Milestone: 0.6.0
Component: helenos/kernel/generic Version: mainline
Keywords: smp, barriers Cc:
Blocker for: Depends on:
See also:


Jiri Zarevucky noticed there are no memory barriers in the HelenOS atomic primitives (both kernel and uspace), which makes them SMP unsafe.

Change History (1)

comment:1 by Jakub Jermář, 9 years ago

Resolution: notadefect
Status: newclosed

Closing as not a bug. The atomics have to be used with explicit memory barriers to be SMP safe.

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