[Xen-devel] [PATCH] common/gnttab: Process softirqs while dumping grant tables

[Andrew Cooper <andrew.cooper3@xxxxxxxxxx>]

OSSTests upgrade to Jessie has identified that with a sufficiently large grant
table, a watchdog timeout can occur.

http://logs.test-lab.xenproject.org/osstest/logs/134399/test-amd64-amd64-xl-qemuu-debianhvm-amd64-shadow/serial-chardonnay0.log

Reported-by: Ian Jackson <Ian.Jackson@xxxxxxxxxx>
Signed-off-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
---
CC: Jan Beulich <JBeulich@xxxxxxxx>
CC: Wei Liu <wei.liu2@xxxxxxxxxx>
CC: Roger Pau Monné <roger.pau@xxxxxxxxxx>
CC: Stefano Stabellini <sstabellini@xxxxxxxxxx>
CC: Julien Grall <julien.grall@xxxxxxx>
CC: Ian Jackson <Ian.Jackson@xxxxxxxxxx>
---
 xen/common/grant_table.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/xen/common/grant_table.c b/xen/common/grant_table.c
index 80728ea..344b3ee 100644
--- a/xen/common/grant_table.c
+++ b/xen/common/grant_table.c
@@ -3956,6 +3956,9 @@ static void gnttab_usage_print(struct domain *rd)
         uint16_t status;
         uint64_t frame;
 
+        if ( !(ref & 31) )
+            process_pending_softirqs();
+
         act = active_entry_acquire(gt, ref);
         if ( !act->pin )
         {
-- 
2.1.4


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