[Xen-changelog] [xen master] mm: don't request scrubbing until dom0 is running

[patchbot@xxxxxxx]

commit 2483ec0c6805f54317d793c3a18ab3b55619c4ad
Author:     Boris Ostrovsky <boris.ostrovsky@xxxxxxxxxx>
AuthorDate: Fri Sep 1 11:06:21 2017 +0200
Commit:     Jan Beulich <jbeulich@xxxxxxxx>
CommitDate: Fri Sep 1 11:06:21 2017 +0200

    mm: don't request scrubbing until dom0 is running
    
    There is no need to scrub pages freed during dom0 construction since
    once dom0 is ready the heap will be scrubbed by scrub_heap_pages() anyway,
    setting scrub_debug at the end.
    
    Signed-off-by: Boris Ostrovsky <boris.ostrovsky@xxxxxxxxxx>
    Reviewed-by: Wei Liu <wei.liu2@xxxxxxxxxx>
---
 xen/common/page_alloc.c | 6 +-----
 1 file changed, 1 insertion(+), 5 deletions(-)

diff --git a/xen/common/page_alloc.c b/xen/common/page_alloc.c
index 2b8bb95..dbad1e1 100644
--- a/xen/common/page_alloc.c
+++ b/xen/common/page_alloc.c
@@ -2248,16 +2248,12 @@ void free_domheap_pages(struct page_info *pg, unsigned 
int order)
 
             spin_unlock_recursive(&d->page_alloc_lock);
 
-#ifndef CONFIG_SCRUB_DEBUG
             /*
              * Normally we expect a domain to clear pages before freeing them,
              * if it cares about the secrecy of their contents. However, after
              * a domain has died we assume responsibility for erasure.
              */
-            scrub = !!d->is_dying;
-#else
-            scrub = true;
-#endif
+            scrub = d->is_dying || scrub_debug;
         }
         else
         {
--
generated by git-patchbot for /home/xen/git/xen.git#master

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