From: KOSAKI Motohiro Date: Fri, 5 Mar 2010 21:41:59 +0000 (-0800) Subject: mm/mempolicy.c: fix indentation of the comments of do_migrate_pages X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=da0aa138944311e6745a00ac3d88f03e8d9a46c4;p=openwrt%2Fstaging%2Fblogic.git mm/mempolicy.c: fix indentation of the comments of do_migrate_pages Currently, do_migrate_pages() have very long comment and this is not indent properly. I often misunderstand it is function starting commnents and confused it. this patch fixes it. note: this patch doesn't break 80 column rule. I guess original author intended this indentaion, but an accident corrupted it. Signed-off-by: KOSAKI Motohiro Reviewed-by: Christoph Lameter Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- diff --git a/mm/mempolicy.c b/mm/mempolicy.c index 44dd9d1521ec..bda230e52acd 100644 --- a/mm/mempolicy.c +++ b/mm/mempolicy.c @@ -888,36 +888,36 @@ int do_migrate_pages(struct mm_struct *mm, if (err) goto out; -/* - * Find a 'source' bit set in 'tmp' whose corresponding 'dest' - * bit in 'to' is not also set in 'tmp'. Clear the found 'source' - * bit in 'tmp', and return that pair for migration. - * The pair of nodemasks 'to' and 'from' define the map. - * - * If no pair of bits is found that way, fallback to picking some - * pair of 'source' and 'dest' bits that are not the same. If the - * 'source' and 'dest' bits are the same, this represents a node - * that will be migrating to itself, so no pages need move. - * - * If no bits are left in 'tmp', or if all remaining bits left - * in 'tmp' correspond to the same bit in 'to', return false - * (nothing left to migrate). - * - * This lets us pick a pair of nodes to migrate between, such that - * if possible the dest node is not already occupied by some other - * source node, minimizing the risk of overloading the memory on a - * node that would happen if we migrated incoming memory to a node - * before migrating outgoing memory source that same node. - * - * A single scan of tmp is sufficient. As we go, we remember the - * most recent pair that moved (s != d). If we find a pair - * that not only moved, but what's better, moved to an empty slot - * (d is not set in tmp), then we break out then, with that pair. - * Otherwise when we finish scannng from_tmp, we at least have the - * most recent pair that moved. If we get all the way through - * the scan of tmp without finding any node that moved, much less - * moved to an empty node, then there is nothing left worth migrating. - */ + /* + * Find a 'source' bit set in 'tmp' whose corresponding 'dest' + * bit in 'to' is not also set in 'tmp'. Clear the found 'source' + * bit in 'tmp', and return that pair for migration. + * The pair of nodemasks 'to' and 'from' define the map. + * + * If no pair of bits is found that way, fallback to picking some + * pair of 'source' and 'dest' bits that are not the same. If the + * 'source' and 'dest' bits are the same, this represents a node + * that will be migrating to itself, so no pages need move. + * + * If no bits are left in 'tmp', or if all remaining bits left + * in 'tmp' correspond to the same bit in 'to', return false + * (nothing left to migrate). + * + * This lets us pick a pair of nodes to migrate between, such that + * if possible the dest node is not already occupied by some other + * source node, minimizing the risk of overloading the memory on a + * node that would happen if we migrated incoming memory to a node + * before migrating outgoing memory source that same node. + * + * A single scan of tmp is sufficient. As we go, we remember the + * most recent pair that moved (s != d). If we find a pair + * that not only moved, but what's better, moved to an empty slot + * (d is not set in tmp), then we break out then, with that pair. + * Otherwise when we finish scannng from_tmp, we at least have the + * most recent pair that moved. If we get all the way through + * the scan of tmp without finding any node that moved, much less + * moved to an empty node, then there is nothing left worth migrating. + */ tmp = *from_nodes; while (!nodes_empty(tmp)) {