Hi! > For testing swap-over-NBD, a machine was booted with 2G of RAM with a > swapfile backed by NBD. 16*NUM_CPU processes were started that create > anonymous memory mappings and read them linearly in a loop. The total > size of the mappings were 4*PHYSICAL_MEMORY to use swap heavily under > memory pressure. Without the patches, the machine locks up within > minutes and runs to completion with them applied. > > Comments? Nice! It is easy to see why swapping needs these fixes, but... dirty memory writeout is used for memory clearing, too. Are same changes neccessary to make that safe? (Perhaps raise 'max dirty %' for testing?) Pavel -- (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxxx For more info on Linux MM, see: http://www.linux-mm.org/ . Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/ Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>