33 lines
1.3 KiB
Diff
33 lines
1.3 KiB
Diff
|
# Commit 0f7b6f91ac1bbfd33b23c291b14874b9561909d2
|
||
|
|
# Date 2013-03-20 10:00:01 +0100
|
||
|
|
# Author Andrew Cooper <andrew.cooper3@citrix.com>
|
||
|
|
# Committer Jan Beulich <jbeulich@suse.com>
|
||
|
|
AMD/IOMMU: Process softirqs while building dom0 iommu mappings
|
||
|
|
|
||
|
|
Recent changes which have made their way into xen-4.2 stable have pushed the
|
||
|
|
runtime of construct_dom0() over 5 seconds, which has caused regressions in
|
||
|
|
XenServer testing because of our 5 second watchdog.
|
||
|
|
|
||
|
|
The root cause is that amd_iommu_dom0_init() does not process softirqs and in
|
||
|
|
particular the nmi_timer which causes the watchdog to decide that no useful
|
||
|
|
progress is being made.
|
||
|
|
|
||
|
|
This patch adds periodic calls to process_pending_softirqs() at the same
|
||
|
|
interval as the Intel variant of this function. The server which was failing
|
||
|
|
with the watchdog test now boots reliably with a timeout of 1 second.
|
||
|
|
|
||
|
|
Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>
|
||
|
|
|
||
|
|
--- a/xen/drivers/passthrough/amd/pci_amd_iommu.c
|
||
|
|
+++ b/xen/drivers/passthrough/amd/pci_amd_iommu.c
|
||
|
|
@@ -285,6 +285,9 @@ static void __init amd_iommu_dom0_init(s
|
||
|
|
if ( mfn_valid(pfn) )
|
||
|
|
amd_iommu_map_page(d, pfn, pfn,
|
||
|
|
IOMMUF_readable|IOMMUF_writable);
|
||
|
|
+
|
||
|
|
+ if ( !(i & 0xfffff) )
|
||
|
|
+ process_pending_softirqs();
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|