>>> POSIX_FADV_DONTNEED = drop page cache if possible >>> POSIX_FADV_NOREUSE = reduce page cache eligibility >> >> Eeek. >> >> Your POSIX_FADV_NOREUSE is very different from POSIX definition. >> POSIX says, >> >> POSIX_FADV_NOREUSE >> Specifies that the application expects to access the specified data once and then >> not reuse it thereafter. >> >> IfI understand correctly, it designed for calling _before_ data access >> and to be expected may prevent lru activation. But your NORESE is designed >> for calling _after_ data access. Big difference might makes a chance of >> portability issue. > > You're right. NOREUSE is designed to implement drop behind policy. > > I'll post a new patch that will plug this logic in DONTNEED (like the > presious version), but without breaking the old /proc/sys/vm/drop_caches > behavior. Great! 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>