( trey | 2007. 06. 29., p – 12:59 )

Na egy TLB-s itt is.

122 TLB Flush Filter May Cause Coherency Problem in
Multiprocessor Systems

Description
Under highly specific internal timing conditions in a multiprocessor configuration, coherency
problems may arise between the page tables in memory and the translations stored in the on-chip
TLBs. This can result in the possible use of stale translations even after software has performed a
TLB flush.

Potential Effect on System
Unpredictable system failure. This scenario has only been observed in a highly randomized synthetic
stress test.

Suggested Workaround
In multiprocessor or multicore systems, disable the TLB flush filter by setting HWCR.FFDIS (bit 6 of
MSR 0xC001_0015).

Fix Planned
No

AMD Opteron

Jelenleg 169-es számnál tartunk.

--
trey @ gépház