Dave Kleikamp <dave.kleikamp@xxxxxxxxxx> writes: >> Whilst I agree with every contradictory word I said back then ;) >> my current position is to wait to see what happens with Shaggy's "loop: >> Issue O_DIRECT aio using bio_vec" https://lkml.org/lkml/2012/11/22/847 > > As the patches exist today, the loop driver will only make the aio calls > if the underlying file defines a direct_IO address op since > generic_file_read/write_iter() will call a_ops->direct_IO() when > O_DIRECT is set. For tmpfs or any other filesystem that doesn't support > O_DIRECT, the loop driver will continue to call the read() or write() > method. Hi, Hugh and Shaggy, Thanks for your replies--it looks like we're back to square one. I think it would be trivial to add O_DIRECT support to tmpfs, but I'm not convinced it's necessary. Should we wait until bug reports start to come in? Cheers, Jeff -- 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>