linux-kernel - linux-next: manual merge of the akpm tree with the tip tree

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Message-Id: <20121210191120.d6984a1183c969ff2bb91d5a@canb.auug.org.au>
Date:	Mon, 10 Dec 2012 19:11:20 +1100
From:	Stephen Rothwell <sfr@...b.auug.org.au>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	linux-next@...r.kernel.org, linux-kernel@...r.kernel.org,
	Rafael Aquini <aquini@...hat.com>,
	Mel Gorman <mgorman@...e.de>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...e.hu>, "H. Peter Anvin" <hpa@...or.com>,
	Peter Zijlstra <peterz@...radead.org>
Subject: linux-next: manual merge of the akpm tree with the tip tree

Hi Andrew,

Today's linux-next merge of the akpm tree got conflicts in mm/migrate.c
and include/linux/migrate.h between commits 070059b28578 ("mm/compaction:
Move migration fail/success stats to migrate.c") and 2d85cca46951
("mm/migrate: Add a tracepoint for migrate_pages") from the tip tree and
commit "mm: adjust address_space_operations.migratepage() return code"
from the akpm tree.

I fixed it up (see below) and can carry the fix as necessary (no action
is required).

-- 
Cheers,
Stephen Rothwell                    sfr@...b.auug.org.au

diff --cc include/linux/migrate.h
index bcb5ddc,50d2974..0000000
--- a/include/linux/migrate.h
+++ b/include/linux/migrate.h
@@@ -7,16 -7,13 +7,23 @@@
  
  typedef struct page *new_page_t(struct page *, unsigned long private, int **);
  
 +enum migrate_reason {
 +	MR_COMPACTION,
 +	MR_MEMORY_FAILURE,
 +	MR_MEMORY_HOTPLUG,
 +	MR_SYSCALL,		/* also applies to cpusets */
 +	MR_MEMPOLICY_MBIND,
 +	MR_NUMA_MISPLACED,
 +	MR_CMA
 +};
 +
+ /*
+  * Return values from addresss_space_operations.migratepage():
+  * - negative errno on page migration failure;
+  * - zero on page migration success;
+  */
+ #define MIGRATEPAGE_SUCCESS		0
+ 
  #ifdef CONFIG_MIGRATION
  
  extern void putback_lru_pages(struct list_head *l);
diff --cc mm/migrate.c
index c0afe60,c3724b6..0000000
--- a/mm/migrate.c
+++ b/mm/migrate.c
@@@ -981,8 -977,7 +981,8 @@@ int migrate_pages(struct list_head *fro
  			case -EAGAIN:
  				retry++;
  				break;
- 			case 0:
+ 			case MIGRATEPAGE_SUCCESS:
 +				nr_succeeded++;
  				break;
  			default:
  				/* Permanent failure */
@@@ -991,14 -986,8 +991,14 @@@
  			}
  		}
  	}
- 	rc = 0;
+ 	rc = nr_failed + retry;
  out:
 +	if (nr_succeeded)
 +		count_vm_events(PGMIGRATE_SUCCESS, nr_succeeded);
 +	if (nr_failed)
 +		count_vm_events(PGMIGRATE_FAIL, nr_failed);
 +	trace_mm_migrate_pages(nr_succeeded, nr_failed, mode, reason);
 +
  	if (!swapwrite)
  		current->flags &= ~PF_SWAPWRITE;
  

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