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[Bug 1001984] New: i386 SMP startup hangs (primary CPU spinlocks forever)
- From: bugzilla-daemon at bugs dot ecos dot sourceware dot org
- To: unassigned at bugs dot ecos dot sourceware dot org
- Date: Fri, 09 May 2014 12:27:00 +0000
- Subject: [Bug 1001984] New: i386 SMP startup hangs (primary CPU spinlocks forever)
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http://bugs.ecos.sourceware.org/show_bug.cgi?id=1001984
Bug ID: 1001984
Summary: i386 SMP startup hangs (primary CPU spinlocks forever)
Product: eCos
Version: 3.0
Target: pc (i386 PC target)
Architecture/Host All
OS:
Status: UNCONFIRMED
Severity: normal
Priority: low
Component: HAL
Assignee: unassigned@bugs.ecos.sourceware.org
Reporter: christoph.borchert@tu-dortmund.de
CC: ecos-bugs@ecos.sourceware.org
Created attachment 2510
--> http://bugs.ecos.sourceware.org/attachment.cgi?id=2510&action=edit
patch
Dear eCos developers,
it appears that during i386 SMP startup, the primary CPU spinlocks forever,
waiting for cyg_hal_smp_cpu_entry[cpu] being reset. I assume this should be
carried out be the secondary CPUs, after that cyg_hal_smp_cpu_entry[cpu] has
been set. This behavior can be reproduced with qemu/kvm -smp 2.
Attached is a patch that solves this issue (at least for me).
Best regards,
Christoph
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