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| author | Andrew Cooper <andrew.cooper3@citrix.com> | 2013-04-02 10:48:36 +0200 |
|---|---|---|
| committer | Jan Beulich <jbeulich@suse.com> | 2013-04-02 10:48:36 +0200 |
| commit | dcae564ba85c516d8a4c4be7981bdae07dd03972 (patch) | |
| tree | 8c8c8be4f90bfc0123cd0703335e2a1b2ec0e76d | |
| parent | 2daa977e4e08b94459b6bfe62cf2c8a381df0903 (diff) | |
| download | xen-dcae564ba85c516d8a4c4be7981bdae07dd03972.tar.gz xen-dcae564ba85c516d8a4c4be7981bdae07dd03972.tar.bz2 xen-dcae564ba85c516d8a4c4be7981bdae07dd03972.zip | |
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>
master changeset: 0f7b6f91ac1bbfd33b23c291b14874b9561909d2
master date: 2013-03-20 10:00:01 +0100
| -rw-r--r-- | xen/drivers/passthrough/amd/pci_amd_iommu.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/xen/drivers/passthrough/amd/pci_amd_iommu.c b/xen/drivers/passthrough/amd/pci_amd_iommu.c index 2955cf0af6..281a52bcfa 100644 --- a/xen/drivers/passthrough/amd/pci_amd_iommu.c +++ b/xen/drivers/passthrough/amd/pci_amd_iommu.c @@ -286,6 +286,9 @@ static void __init amd_iommu_dom0_init(struct domain *d) if ( mfn_valid(pfn) ) amd_iommu_map_page(d, pfn, pfn, IOMMUF_readable|IOMMUF_writable); + + if ( !(i & 0xfffff) ) + process_pending_softirqs(); } } |