https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=221029
--- Comment #13 from Nils Beyer <n...@renzel.net> ---
(In reply to Don Lewis from comment #12)
> I'm pretty sure I saw one while doing a buildworld on ZFS as well. I think
> these errors occur less frequently on ZFS. I just did two poudriere runs
> with tmpfs disabled and didn't see this error.
try my buildkernel/buildworld "ryzen_stress_test.sh" script - let it run for
24h. Execute with:
/usr/bin/nohup sh ryzen_stress_test.sh &
and hope for a "nohup.out" file like this:
-----------------------------------------------------------------------------
mkdir: /tmp/ryzen_stress_test: File exists
Wed Jul 26 19:23:09 CEST 2017 begin
Wed Jul 26 19:45:04 CEST 2017 end - errorcode 0
Wed Jul 26 19:45:04 CEST 2017 begin
Wed Jul 26 20:07:06 CEST 2017 end - errorcode 0
Wed Jul 26 20:07:06 CEST 2017 begin
Wed Jul 26 20:29:09 CEST 2017 end - errorcode 0
Wed Jul 26 20:29:09 CEST 2017 begin
Wed Jul 26 20:44:52 CEST 2017 end - errorcode 2
Wed Jul 26 20:44:52 CEST 2017 begin
Wed Jul 26 21:06:52 CEST 2017 end - errorcode 0
Wed Jul 26 21:06:52 CEST 2017 begin
Wed Jul 26 21:28:55 CEST 2017 end - errorcode 0
Wed Jul 26 21:28:55 CEST 2017 begin
Wed Jul 26 21:50:57 CEST 2017 end - errorcode 0
Wed Jul 26 21:50:57 CEST 2017 begin
Wed Jul 26 22:13:00 CEST 2017 end - errorcode 0
Wed Jul 26 22:13:00 CEST 2017 begin
Wed Jul 26 22:35:00 CEST 2017 end - errorcode 0
Wed Jul 26 22:35:00 CEST 2017 begin
-----------------------------------------------------------------------------
> My first suspicion is that this could be race condition in our code exposed
> by more parallelism.
I don't think so because this does happen in poudriere builds, too. These
builds are mainly single-thread builds - "kf5-kservice-5.36.0" for instance
generated that though it is single-threaded. And for buildkernel/buildworld,
this does not happen on my Intel system with the same number of threads (20)
> Which version of the share page patch are you running?
this one:
-------------------------------------------------------------------------------
Index: sys/amd64/include/vmparam.h
===================================================================
--- sys/amd64/include/vmparam.h (revision 321399)
+++ sys/amd64/include/vmparam.h (working copy)
@@ -176,7 +176,7 @@
#define VM_MAXUSER_ADDRESS UVADDR(NUPML4E, 0, 0, 0)
-#define SHAREDPAGE (VM_MAXUSER_ADDRESS - PAGE_SIZE)
+#define SHAREDPAGE (VM_MAXUSER_ADDRESS - 2*PAGE_SIZE)
#define USRSTACK SHAREDPAGE
#define VM_MAX_ADDRESS UPT_MAX_ADDRESS
-------------------------------------------------------------------------------
> Earlier you mentioned not seeing this on the machine using the original
> version.
I think you mean this comment here:
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=219399#c127
I haven't seen them yet at that time - but they appeared in a following
poudriere session...
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