Hi Minchan, On 07/07/2014 08:53 AM, Minchan Kim wrote: > Linux doesn't have an ability to free pages lazy while other OS > already have been supported that named by madvise(MADV_FREE). > > The gain is clear that kernel can discard freed pages rather than > swapping out or OOM if memory pressure happens. > > Without memory pressure, freed pages would be reused by userspace > without another additional overhead(ex, page fault + allocation > + zeroing). > > How to work is following as. > > When madvise syscall is called, VM clears dirty bit of ptes of > the range. This should be updated because the implementation has been changed. It also remove the page from the swapcache if it is. Thank you for your effort! -- Thanks. Zhang Yanfei -- To unsubscribe from this list: send the line "unsubscribe linux-api" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
