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(parent: 47e2650) | patch
eliminate possible race in parallel TLB shootdown IPI
authorTycho Nightingale <tychon@FreeBSD.org>
Tue, 13 Oct 2020 18:28:48 +0000 (18:28 +0000)
committerTycho Nightingale <tychon@FreeBSD.org>
Tue, 13 Oct 2020 18:28:48 +0000 (18:28 +0000)
commit42360f5c5b575b3f4098110fc8dfd2f4d11b6481
treed10770ec509e709c49ed220353ff1cf0a40c0042tree | snapshot
parent47e2650ea4ff1d7d603b6b1c53b8cb6789532210commit | diff
eliminate possible race in parallel TLB shootdown IPI

On the target side TLB shootdown IPI handler, prevent the compiler
from performing a forward store optimization which may mask a
subsequent update to the scoreboard by the initiator.

Reported by: Max Laier, Anton Rang
Discussed with: kib
Sponsored by: Dell EMC Isilon
sys/amd64/amd64/mp_machdep.c diff | blob | history
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