From: David Vrabel <david.vrabel@citrix.com>
Date: Wed, 28 Oct 2015 13:39:05 +0000 (+0000)
Subject: x86/xen: add reschedule point when mapping foreign GFNs
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=914beb9fc26d6225295b8315ab54026f8f22755c;p=linux-beck.git

x86/xen: add reschedule point when mapping foreign GFNs

Mapping a large range of foreign GFNs can take a long time, add a
reschedule point after each batch of 16 GFNs.

Signed-off-by: David Vrabel <david.vrabel@citrix.com>
Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
---

diff --git a/arch/x86/xen/mmu.c b/arch/x86/xen/mmu.c
index 9c479fe40459..ac161db63388 100644
--- a/arch/x86/xen/mmu.c
+++ b/arch/x86/xen/mmu.c
@@ -2888,6 +2888,7 @@ static int do_remap_gfn(struct vm_area_struct *vma,
 		addr += range;
 		if (err_ptr)
 			err_ptr += batch;
+		cond_resched();
 	}
 out: