[Xen-changelog] [xen-3.4-testing] x86: run timers when populating Dom0's P2M table

["Xen patchbot-3.4-testing" <patchbot-3.4-testing@xxxxxxxxxxxxxxxxxxx>]

# HG changeset patch
# User Keir Fraser <keir.fraser@xxxxxxxxxx>
# Date 1251968563 -3600
# Node ID b1d3e2067b3c8d7946fa9fbafe62a36524cbfd69
# Parent  fdec98c673e8be286ee8ceaefcdd038c74d1c6c4
x86: run timers when populating Dom0's P2M table

When booting Dom0 with huge amounts of memory, and/or memory accesses
being sufficiently slow (due to NUMA effects), and the ACPI PM timer
or a high frequency HPET being used, the time it takes to populate the
M2P table may significantly exceed the overflow time of the platform
timer, screwing up time management to the point where Dom0 boot fails.

Signed-off-by: Jan Beulich <jbeulich@xxxxxxxxxx>
xen-unstable changeset:   20112:7e1943203942
xen-unstable date:        Mon Aug 24 08:02:08 2009 +0100
---
 xen/arch/x86/domain_build.c |    6 ++++++
 1 files changed, 6 insertions(+)

diff -r fdec98c673e8 -r b1d3e2067b3c xen/arch/x86/domain_build.c
--- a/xen/arch/x86/domain_build.c       Thu Sep 03 10:02:12 2009 +0100
+++ b/xen/arch/x86/domain_build.c       Thu Sep 03 10:02:43 2009 +0100
@@ -877,6 +877,8 @@ int __init construct_dom0(
         else
             ((unsigned int *)vphysmap_start)[pfn] = mfn;
         set_gpfn_from_mfn(mfn, pfn);
+        if (!(pfn & 0xfffff))
+            process_pending_timers();
     }
     si->first_p2m_pfn = pfn;
     si->nr_p2m_frames = d->tot_pages - count;
@@ -895,6 +897,8 @@ int __init construct_dom0(
 #ifndef NDEBUG
             ++alloc_epfn;
 #endif
+            if (!(pfn & 0xfffff))
+                process_pending_timers();
         }
     }
     BUG_ON(pfn != d->tot_pages);
@@ -915,6 +919,8 @@ int __init construct_dom0(
             set_gpfn_from_mfn(mfn, pfn);
 #undef pfn
             page++; pfn++;
+            if (!(pfn & 0xfffff))
+                process_pending_timers();
         }
     }
 

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