[PATCH 1/4] mm: Initialize lowmem virq when boot-time scrubbing is disabled

From: Boris Ostrovsky <boris.ostrovsky@oracle.com>
To: xen-devel@lists.xen.org
Cc: sstabellini@kernel.org, wei.liu2@citrix.com,
	George.Dunlap@eu.citrix.com, andrew.cooper3@citrix.com,
	ian.jackson@eu.citrix.com, tim@xen.org, jbeulich@suse.com,
	Boris Ostrovsky <boris.ostrovsky@oracle.com>
Subject: [PATCH 1/4] mm: Initialize lowmem virq when boot-time scrubbing is disabled
Date: Mon, 28 Aug 2017 16:40:26 -0400	[thread overview]
Message-ID: <1503952829-11065-2-git-send-email-boris.ostrovsky@oracle.com> (raw)
In-Reply-To: <1503952829-11065-1-git-send-email-boris.ostrovsky@oracle.com>

scrub_heap_pages() does early return if boot-time scrubbing is
disabled, neglecting to initialize lowmem VIRQ.

Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
---
 xen/common/page_alloc.c | 12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)

diff --git a/xen/common/page_alloc.c b/xen/common/page_alloc.c
index 9fa62d2..7d56e92 100644
--- a/xen/common/page_alloc.c
+++ b/xen/common/page_alloc.c
@@ -1849,6 +1849,14 @@ void __init scrub_heap_pages(void)
     int last_distance, best_node;
     int cpus;
 
+    /*
+     * Set bounds for the low mem virq algorithm.
+     * Not the most logical place for this but it needs to be done
+     * after dom0 has been constructed and this seems to be a
+     * convenient location.
+     */
+    setup_low_mem_virq();
+
     if ( !opt_bootscrub )
         return;
 
@@ -1970,10 +1978,6 @@ void __init scrub_heap_pages(void)
 #ifdef CONFIG_SCRUB_DEBUG
     boot_scrub_done = true;
 #endif
-
-    /* Now that the heap is initialized, run checks and set bounds
-     * for the low mem virq algorithm. */
-    setup_low_mem_virq();
 }
 
 
-- 
1.8.3.1


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