于 2011年06月22日 17:16, Mel Gorman 写道:
What I meant was that there is a rational reason why 512M is the default for enabling THP by default. Tuning it lower than that by any means makes very little sense. Tuning it higher might make some sense but it is more likely that THP would simply be disabled via sysctl. I see very little advantage to introducing this Kconfig option other than as a source of confusion when running make oldconfig.
The tunable range is (512, 8192), so 512M is the minimum. Sure, I knew it can be disabled via /sys, actually we can do even more in user-space, that is totally move the 512M check out of kernel, why we didn't? In short, I think we should either remove the 512M from kernel, or make 512M to be tunable. Thanks. -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. 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>