On Fri, May 15, 2015 at 1:37 PM, Darrick J. Wong <darrick.wong@xxxxxxxxxx> wrote: > On Fri, May 15, 2015 at 10:55:32AM -0700, Eric Wheeler wrote: >> > Going through various forum messages and bug reports (for Debian: >> > https://lists.debian.org/debian-kernel/2015/03/msg00060.html for Arch: >> > https://bugs.archlinux.org/task/38843 for some other distro: >> > https://groups.google.com/forum/#!msg/esos-users/NXp8tG7sVE8/QXZyPdZ2saIJ >> > ) it looks like the bcache_writeback kernel thread, being in >> > uninterruptible sleep, keeps the load average at 1.0 (or maybe more) >> > always. Could you please confirm this ? >> >> Try the attached patches that I've been collecting over the past year or >> two. I do not believe they have been merged into mainline (BUT SOMEONE >> NEEDS TO). >> >> I am not sure that these address the load bug, but if the load is being >> increased by a large amount of dmesg output caused by rcu traces, then the >> patches will help. > > I just put all five of them into a 4.0.3 kernel, but sadly they don't > fix the load average bug. That said, they look like pretty reasonable > bugfixes to me. Maybe someone should just send them to Linus, if the > maintainer hasn't otherwise objected? I have put the patches here. https://git.kernel.org/cgit/linux/kernel/git/mlin/linux.git/log/?h=bcache I'm new to bcache code. I'll read these patches and run some tests. Ming -- To unsubscribe from this list: send the line "unsubscribe linux-bcache" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
