On Wed, 3 Aug 2016, Marc MERLIN wrote: > On Wed, Aug 03, 2016 at 05:26:30PM -0700, Eric Wheeler wrote: > > On Wed, 3 Aug 2016, Marc MERLIN wrote: > > > > > This happens on all kernels up to 4.7. > > > Sorry, it happens earlier than ethernet coming up or my storage, so I can't > > > use netconsole or other text dumps: > > > https://goo.gl/photos/ubsi6maZXsjkevYY7 > > > > > > Looks like the warning happens on the registration of one of my bcache, but > > > I can't tell which one or why. > > > > > > Does the trace give any hints? > > > (please ignore the load modules errors below, different issue) > > > > Does it cause a problem, or just warn? > > No problem, but since it's a warning, I'm reporting it. > > > It looks like something needs garbage collected but perhaps isn't. > > > > You could write to sysfs/.../trigger_gc: > > > > https://evilpiepirate.org/git/linux-bcache.git/tree/Documentation/bcache.txt > > trigger_gc > > Writing to this file forces garbage collection to run. > > BTW both this and the just released 4.7.0 are still missing the > documentation updates I contributed months ago. Any idea what's going on > there? > > > If that doesn't work, I wonder what increasing BUCKET_GC_GEN_MAX would do, > > though I don't know if that is safe. Its set to 96U, so its not on on a > > bit boundary which sounds like it could be slightly safer---but I wouldn't > > try it unless this is a test machine. > > That's on the backing device, correct? > I have 3 of them, and I can only write to them way way later in the boot > process. > Should I do that one by one and see if I get output now? When you say do "that" do you mean `trigger_gc` ? I think trigger_gc a cache thing, but the whole bcacheN dev might need to be online before it can be triggered (not sure). Backing devices really have metadata, just superblock. -- Eric Wheeler > > Thanks, > Marc > -- > "A mouse is a device used to point at the xterm you want to type in" - A.S.R. > Microsoft is to operating systems .... > .... what McDonalds is to gourmet cooking > Home page: http://marc.merlins.org/ > -- > 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 > -- 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
