On Wed, Apr 27, 2011 at 14:13, Andrea Righi wrote: > Introduce a new fadvise flag to drop page cache pages of a single > filesystem. > > At the moment it is possible to drop page cache pages via > /proc/sys/vm/drop_pagecache or via posix_fadvise(POSIX_FADV_DONTNEED). > > The first method drops the whole page cache while the second can be used > to drop page cache pages of a single file descriptor. However, there's > not a simple way to drop all the pages of a filesystem (we could scan > all the file descriptors and use posix_fadvise(POSIX_FADV_DONTNEED), but > this solution obviously doesn't scale well). what if you open the mount point and use POSIX_FADV_DONTNEED on that dir handle ? if you required write access for that level, it'd also implicitly take care of the permission issue. but maybe this is just trying to fit existing code in the wrong way. -mike -- To unsubscribe from this list: send the line "unsubscribe linux-api" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
