Hello! On my x86-64 PC (Intel Core i5 2500, 16GB RAM), I have the same 3.11 kernel built for the i686 (with PAE) and x86-64 architectures. What's really troubling me is that the x86-64 kernel has the following problem: When I copy large files to any storage device, be it my HDD with ext4 partitions or flash drive with FAT32 partitions, the kernel first caches them in memory entirely then flushes them some time later (quite unpredictably though) or immediately upon invoking "sync". How can I disable this memory cache altogether (or at least minimize caching)? When running the i686 kernel with the same configuration I don't observe this effect - files get written out almost immediately (for instance "sync" takes less than a second, whereas on x86-64 it can take a dozen of _minutes_ depending on a file size and storage performance). I'm _not_ talking about disabling write cache on my storage itself (hdparm -W 0 /dev/XXX) - firstly this command is detrimental to the performance of my PC, secondly, it won't help in this instance. Swap is totally disabled, usually my memory is entirely free. My kernel configuration can be fetched here: https://bugzilla.kernel.org/show_bug.cgi?id=63531 Please, advise. Best regards, Artem -- 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/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>