> Hmm, What if you do want to evict it from the cache for testing purposes? > Perhaps this functionality should be associated with POSIX_FADV_NOREUSE? > dd has been recently modified to support invalidating the cache for a file, > and it uses POSIX_FADV_DONTNEED for that. > http://git.sv.gnu.org/gitweb/?p=coreutils.git;a=commitdiff;h=5f311553 This change don't break dd. dd don't have a special privilege of file cache dropping if it's also used by other processes. if you want to drop a cache forcely (maybe for testing), you need to use /proc/sys/vm/drop_caches. It's ok to ignore other processes activity because it's privilege operation. 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>