On Sat, Apr 07, 2018 at 02:34:54PM -0500, Justin Hibbits wrote: > On Fri, Apr 6, 2018 at 10:25 AM, Justin Hibbits <chmeeedalf_at_gmail.com> wrote: > > On Fri, Apr 6, 2018 at 10:08 AM, Mark Johnston <markj_at_freebsd.org> wrote: > >> On Fri, Apr 06, 2018 at 12:47:14AM +0000, Justin Hibbits wrote: > >>> My powerpc64 embedded machine is virtually unusable since these vm changes. > >>> I tried setting vfs.zfs.arc_free_target as suggested, and that didn't help > >>> at all. Eventually the machine hangs and just gets stuck in vmdaemon, with > >>> many processes in wait channel btalloc. > >> > >> You don't really have the same symptoms that Don is reporting. > > > > Okay. I latched onto the thread because it seemed similar. > > > >> Threads being stuck in btalloc implies a KVA shortage. So: > >> - What do you mean by "stuck in vmdaemon"? > > > > The machine hangs, and my ssh sessions get killed. I can't do > > anything at the console except break into kdb. When I do, the running > > thread is always vmdaemon. > > > >> - Which commits specifically cause problems? Does reverting r329882 fix the > >> hang? > > > > I'll try reverting it and report back. Thankfully I can buildkernel > > successfully on the machine before it hangs. Can't do more than that, > > though. > > I reverted back to r329881, and successfully built world. Updated to > r329882 and it got stuck with processes in btalloc. > > I've seen other reports of r329882 causing problems on powerpc64 as > well, with other bizarre behaviors. Did you try the patch that I had posted? If not, could you? Please also update zfs_arc_free_target or just apply D14994.Received on Sat Apr 07 2018 - 17:49:41 UTC
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