On Thu, Jan 19, 2012 at 11:05 AM, Ronen Hod<rhod@xxxxxxxxxx> wrote:I'm not saying that the kernel should use it directly but it seemsWould you suggest to use min_free_kbytes as the threshold for sendingI believe that it will be best if the kernel publishes an idealIsn't
number_of_free_pages (in /proc/meminfo or whatever). Such number is easy to
work with since this is what applications do, they free pages. Applications
will be able to refer to this number from their garbage collector, or before
allocating memory also if they did not get a notification, and it is also
useful if several applications free memory at the same time.
/proc/sys/vm/min_free_kbytes
pretty much just that?
low_memory_notifications to applications, and separately as a target value
for the applications' memory giveaway?
like the kind of "ideal number of free pages" threshold you're
suggesting. So userspace can read that value and use it as the "number
of free pages" threshold for VM events, no?
Pekka