Hi All, On 05/24/2010 07:48 PM, Nitin Gupta wrote: > Creates RAM based block devices: /dev/zramX (X = 0, 1, ...). > Pages written to these disks are compressed and stored in memory > itself. These disks allow very fast I/O and compression provides > good amounts of memory savings. > > This is enhancement over existing ramzswap driver which creates > virtual block devices (/dev/ramzswapX) which could be used only > as swap disks. > > Now, with the ability to handle any kind of I/O request, zram > devices have lot more use cases: > - /tmp storage > - various caches under /var > - swap disks > - maybe even more! :) > > Performance numbers can be found at: > http://code.google.com/p/compcache/wiki/zramperf > Any reviews/comments, please? I also performed iozone tests to stress zram: http://code.google.com/p/compcache/wiki/zramIOzone Note that the effect of pagecache could not be completely avoided, even when pagecache was dropped every 1 second. So, this iozone test should not be considered for speed measurements but as a stress test only. For speed tests, you can refer 'dd' test results included in changelog (patch 1). No errors were observed during either iozone or dd tests. Thanks, Nitin _______________________________________________ devel mailing list devel@xxxxxxxxxxxxxxxxxxxxxx http://driverdev.linuxdriverproject.org/mailman/listinfo/devel
