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authorJason Liu <r64343@freescale.com>2013-01-11 14:31:47 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2013-01-11 14:54:54 -0800
commit7964c06d66c76507d8b6b662bffea770c29ef0ce (patch)
treef723b15a16d13a17b252df12579fe9956d554a4a /fs/jffs2
parentc0232ae861df679092c15960b6cd9f589d9b7177 (diff)
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mm: compaction: fix echo 1 > compact_memory return error issue
when run the folloing command under shell, it will return error sh/$ echo 1 > /proc/sys/vm/compact_memory sh/$ sh: write error: Bad address After strace, I found the following log: ... write(1, "1\n", 2) = 3 write(1, "", 4294967295) = -1 EFAULT (Bad address) write(2, "echo: write error: Bad address\n", 31echo: write error: Bad address ) = 31 This tells system return 3(COMPACT_COMPLETE) after write data to compact_memory. The fix is to make the system just return 0 instead 3(COMPACT_COMPLETE) from sysctl_compaction_handler after compaction_nodes finished. Signed-off-by: Jason Liu <r64343@freescale.com> Suggested-by: David Rientjes <rientjes@google.com> Acked-by: Mel Gorman <mgorman@suse.de> Cc: Rik van Riel <riel@redhat.com> Cc: Minchan Kim <minchan@kernel.org> Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Acked-by: David Rientjes <rientjes@google.com> Cc: <stable@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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