From: Andy Lutomirski <luto@kernel.org>
To: xen-devel@lists.xenproject.org
Cc: Juergen Gross <jgross@suse.com>,
x86@kernel.org, linux-kernel@vger.kernel.org,
Andy Lutomirski <luto@kernel.org>,
Boris Ostrovsky <boris.ostrovsky@oracle.com>
Subject: [PATCH] x86/xen: Improve failed hypercall debugging
Date: Tue, 2 May 2017 10:59:22 -0700 [thread overview]
Message-ID: <1eda2acc5ed68b41f24ba7ab2672976fd92a7f9e.1493747901.git.luto__43051.1971273974$1493748049$gmane$org@kernel.org> (raw)
When fiddling with xen_exit_mmap(), I noticed that failed multicall
debugging doesn't work if the multicall is just one call. Fix it.
Cc: Juergen Gross <jgross@suse.com>
Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Cc: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Signed-off-by: Andy Lutomirski <luto@kernel.org>
---
arch/x86/xen/multicalls.c | 26 +++++++++++++-------------
1 file changed, 13 insertions(+), 13 deletions(-)
diff --git a/arch/x86/xen/multicalls.c b/arch/x86/xen/multicalls.c
index ea54a08d8301..b6b3f024d342 100644
--- a/arch/x86/xen/multicalls.c
+++ b/arch/x86/xen/multicalls.c
@@ -96,23 +96,23 @@ void xen_mc_flush(void)
for (i = 0; i < b->mcidx; i++)
if (b->entries[i].result < 0)
ret++;
+ }
#if MC_DEBUG
- if (ret) {
- printk(KERN_ERR "%d multicall(s) failed: cpu %d\n",
- ret, smp_processor_id());
- dump_stack();
- for (i = 0; i < b->mcidx; i++) {
- printk(KERN_DEBUG " call %2d/%d: op=%lu arg=[%lx] result=%ld\t%pF\n",
- i+1, b->mcidx,
- b->debug[i].op,
- b->debug[i].args[0],
- b->entries[i].result,
- b->caller[i]);
- }
+ if (ret) {
+ printk(KERN_ERR "%d multicall(s) failed: cpu %d\n",
+ ret, smp_processor_id());
+ dump_stack();
+ for (i = 0; i < b->mcidx; i++) {
+ printk(KERN_DEBUG " call %2d/%d: op=%lu arg=[%lx] result=%ld\t%pF\n",
+ i+1, b->mcidx,
+ b->debug[i].op,
+ b->debug[i].args[0],
+ b->entries[i].result,
+ b->caller[i]);
}
-#endif
}
+#endif
b->mcidx = 0;
b->argidx = 0;
--
2.9.3
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next reply other threads:[~2017-05-02 17:59 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-05-02 17:59 Andy Lutomirski [this message]
2017-05-02 17:59 [PATCH] x86/xen: Improve failed hypercall debugging Andy Lutomirski
2017-05-02 18:28 ` Boris Ostrovsky
2017-05-02 18:28 ` Boris Ostrovsky
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