From: Olaf Hering <olaf@aepfle.de>
Date: Fri, 25 Mar 2011 08:57:28 +0000 (+0000)
Subject: xentrace: print calculated numbers in calculate_tbuf_size()
X-Git-Url: https://dgit.raspbian.org/?a=commitdiff_plain;h=b850b9b5730eae9ad058bf17f5b760183a021a90;p=xen.git

xentrace: print calculated numbers in calculate_tbuf_size()

Print number of pages to allocate for per-cpu tracebuffer and metadata
to ease debugging when allocation fails.

Signed-off-by: Olaf Hering <olaf@aepfle.de>
---

diff --git a/xen/common/trace.c b/xen/common/trace.c
index e290cdce17..cebc5d48d8 100644
--- a/xen/common/trace.c
+++ b/xen/common/trace.c
@@ -127,6 +127,8 @@ static int calculate_tbuf_size(unsigned int pages)
     t_info_words = num_online_cpus() * pages + t_info_first_offset;
     t_info_bytes = t_info_words * sizeof(uint32_t);
     t_info_pages = PFN_UP(t_info_bytes);
+    printk(XENLOG_INFO "xentrace: requesting %u t_info pages for %u trace pages on %u cpus\n",
+               t_info_pages, pages, num_online_cpus());
     return pages;
 }