[ +cc: kent ] On Wed, 24 Feb 2016, Marc MERLIN wrote: > On Wed, Feb 24, 2016 at 06:53:05AM +0000, Eric Wheeler wrote: > > Be sure to cherry-pick these from linux 4.5-rc1: > > git cherry-pick 2ef9ccbf~1..627ccd20 > > or use one of the 4.1 or 3.18 longterm kernels. > > So, I added these patches to my 4.4.2 kernel, but it still crashes when > seeing one cache device at boot. > > Crash: > https://goo.gl/photos/8H1DtYjSijK4ngFv6 > > static void read_dirty(struct cached_dev *dc) > [...] > while (!kthread_should_stop()) { > try_to_freeze(); > > w = bch_keybuf_next(&dc->writeback_keys); > if (!w) > break; > > >>>>> BUG_ON(ptr_stale(dc->disk.c, &w->key, 0)); > > if (KEY_START(&w->key) != dc->last_read || Kent, any idea whats going on here? What is this BUG_ON checking? It looks like dirty data is being read immediately after register, possibly due to a crash. -Eric > > I have to remove the partition for my system to boot. > > Before I destroy it, any other patches I should try? > > And to be fair, it's a huge pain to deal with this, there should be an > easier way to just turn bcache off from the kernel command line. In this > case it was really a lot of work to get back to even a booting system. > > You also said: > > 4.1.18 has the patches, so unless there is something specific in 4.4 that > > you need, I recommend 4.1. We've been running 4.1.17 with patches in > > production for a while and it works great. Haven't tried vanilla 4.1.18 > > yet, but I plan to soon. > > Sadly, I run btrfs, I can't just go to random old kernels like this. > Is bcache not stable in up to date kernels? > > 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/ | PGP 1024R/763BE901 > -- > 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
