On Mon, Mar 11, 2013 at 11:11:26AM +0800, Simon Jeons wrote: > Hi Johannes, > On 03/08/2013 10:35 AM, Johannes Weiner wrote: > >On Thu, Mar 07, 2013 at 06:07:23PM -0800, Raymond Jennings wrote: > >>Just a two cent question, but is there any merit to having the kernel > >>defragment swap space? > >That is a good question. > > One question here: > > The comments of setup_swap_extents: > An ordered list of swap extents is built at swapon time and is then > used at swap_writepage/swap_readpage tiem for locating where on disk > a page belongs. > But I didn't see any handle of swap extents in > swap_writepage/swap_readpage, why? This is not the right place for such questions. If you are interested in how the kernel works, buy a book, read the code, consult the kernel newbies project if you get stuck. Also, the answer to your question is within a few lines of each other in that same code file. Make an effort. -- 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>