On 2013-11-25 07:55, Jim Salter wrote: > Can you elaborate on this please? I'm not directly familiar with > cgroups, I'd greatly appreciate a quick-and-dirty example of using BIO > cgroup to limit I/O bandwidth. > > Limiting bandwidth definitely would ameliorate the problem for me; I > already use pv's bw-limiting feature to make btrfs send | btrfs receive > tolerable. > > On 11/25/2013 07:25 AM, Austin S Hemmelgarn wrote: >> 2. allow the user to set a reasonable I/O bandwidth limit on the scrub >> processes (you could already do this with the BIO cgroup, but it would >> be nice to not need that to be compiled into the kernel to have this >> happen) > I'm not very clear on the specifics, (the only cgroup I personally use with any regularity is freezer), but I would suggest looking at Documentation/cgroups/blkio-controller.txt in the kernel source tree (cgroups are one of the better subsystems WRT documentation). I'm pretty certain that most distributions have the required kernel options compiled in by default, and automatically mount the needed filesystems. -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
