On Tuesday, January 9, 2018 11:15:56 AM CET Joerg Schilling wrote: > Pavel Raiskup <prais...@redhat.com> wrote: > > > On Tuesday, January 9, 2018 8:59:06 AM CET Paul Eggert wrote: > > > Pavel Raiskup wrote: > > > > So what about special casing that filesystem, where we can lseek() for > > > > holes anyway? > > > > > > If we can lseek for holes, then why not just do that? > > > > Checking whether lseek() actually works costs some additional syscalls _per > > sparse_ file; checking for ST_NBLOCKS() is without this penalty. > > Well, star does this since a long time and the penalty is a few microseconds.
It would be interesting to see how network filesystems are affected. Pavel
