On 08/05/2013 11:04 AM, Luigi Semenzato wrote: > We can reproduce this by running a few processes that mmap large > chunks of memory, then randomly touch pages to fault them in. We also > think this happens when a process writes a large amount of data using > buffered I/O, and the "Buffers" field in /proc/meminfo exceeds 1GB. > (This is something that can and should be corrected by using > unbuffered I/O instead, but it's a data point.) Where are all the buffers coming from? Most I/O to/from filesystems should be instantiating relatively modest amounts of Buffers. Are you doing I/O directly to devices for some reason? -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>