https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=289297
Bug ID: 289297
Summary: Intel Xeon 6 with high number of threads : kernel
panic
Product: Base System
Version: 15.0-CURRENT
Hardware: amd64
OS: Any
Status: New
Severity: Affects Only Me
Priority: ---
Component: kern
Assignee: [email protected]
Reporter: [email protected]
Created attachment 263484
--> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=263484&action=edit
acpidump -dt (zipped version, too big)
Hi,
We have two brand new servers with 2x Intel 6787p, 86 cores / 172 threads each,
total of 344 threads.
A user from FreeBSD forum has a good idea on what is happening :
The problem is that an attempt is made to use APIC IDs larger than 255. With 2
CPUs, each having 86 cores and each core having 2 threads, the number of CPUs
as seen by FreeBSD becomes quite large. With each CPU having its own APIC, APIC
IDs larger than 255 have to be used. There are some problems reported with
that. See <https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=288122>,
<https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=287492> and
<https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=273022>
And he suggested that I am opening this ticket and attaching the acpidump -dt
Thanks !
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