linux-kernel - [patch 2/3] mempolicy: mpol_rebind

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Message-ID: <alpine.DEB.0.9999.0710251913130.30400@chino.kir.corp.google.com>
Date:	Thu, 25 Oct 2007 19:14:31 -0700 (PDT)
From:	David Rientjes <rientjes@...gle.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
cc:	Andi Kleen <ak@...e.de>, Paul Jackson <pj@....com>,
	Christoph Lameter <clameter@....com>,
	Lee Schermerhorn <Lee.Schermerhorn@...com>,
	linux-kernel@...r.kernel.org
Subject: [patch 2/3] mempolicy: mpol_rebind_policy cleanup

Set the memory policy nodemask to the new nodemask on rebind only in one
place.  The only memory policy that does not need an associated mpolmask
is MPOL_DEFAULT.

Cc: Andi Kleen <ak@...e.de>
Cc: Christoph Lameter <clameter@....com>
Cc: Lee Schermerhorn <Lee.Schermerhorn@...com>
Signed-off-by: Paul Jackson <pj@....com>
Signed-off-by: David Rientjes <rientjes@...gle.com>
---
 mm/mempolicy.c |    5 ++---
 1 files changed, 2 insertions(+), 3 deletions(-)

diff --git a/mm/mempolicy.c b/mm/mempolicy.c
--- a/mm/mempolicy.c
+++ b/mm/mempolicy.c
@@ -1741,14 +1741,12 @@ static void mpol_rebind_policy(struct mempolicy *pol,
 	case MPOL_INTERLEAVE:
 		nodes_remap(tmp, pol->v.nodes, *mpolmask, *newmask);
 		pol->v.nodes = tmp;
-		*mpolmask = *newmask;
 		current->il_next = node_remap(current->il_next,
 						*mpolmask, *newmask);
 		break;
 	case MPOL_PREFERRED:
 		pol->v.preferred_node = node_remap(pol->v.preferred_node,
 						*mpolmask, *newmask);
-		*mpolmask = *newmask;
 		break;
 	case MPOL_BIND: {
 		nodemask_t nodes;
@@ -1773,13 +1771,14 @@ static void mpol_rebind_policy(struct mempolicy *pol,
 			kfree(pol->v.zonelist);
 			pol->v.zonelist = zonelist;
 		}
-		*mpolmask = *newmask;
 		break;
 	}
 	default:
 		BUG();
 		break;
 	}
+	if (pol->policy != MPOL_DEFAULT)
+		*mpolmask = *newmask;
 }
 
 /*
-
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