On Dec 16, 2007, at 11:40 PM, John Watlington wrote: > I'm curious how you measured this, as the underlying hardware only > supports a max. transfer rate of around 20 MiB/s...
As Artem mentioned, UBIFS employs a write-back cache, meaning writes aren't flushed to the underlying medium immediately; pages are instead marked dirty in the page cache and written back when evicted. This makes a hell of a lot of sense. In a synchronous filesystem like JFFS2, constant and repeated writes to the same single page will keep pummeling the underlying flash needlessly. With UBIFS, such writes succeed instantly but only cause a write/erase cycle on the flash to be triggered when the page gets kicked out of the page cache either because the RAM is needed or because of the kernel thread performing dirty page writeback on a timer. -- Ivan Krstić <[EMAIL PROTECTED]> | http://radian.org _______________________________________________ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
