On Wed, Mar 09, 2016 at 03:59:30AM +0000, Eric Wheeler wrote: > > gargamel:/mnt/mnt# cat /proc/sys/vm/min_free_kbytes > > 19712 > > Ours is set to 256mb (256*1024) and I've never had a problem. > > > Should I change it? > > Could try it, shrug. Done :) > > So clearly on this boot too, it got registered late (20h-ish after boot) > > I find it interesting that it re-registered md5 within 5 minutes of 24 > hours after initial registration: (86242-102)/3600 = 23:55:40 Oh, I didn't do the math, but yeah, that looks very suspicous :) > Is there some kind of cron.daily thing going on? If you have timestamps > for that kernel log, maybe check cron for logs too. I don't have any cronjobs that do anything with bcache, but I have cronjobs that scan all drives and save all partitions plus other related stuff. That said, if I recall correctly, it died just when I restarted a copy to that filesystem (but my memory of that event is getting hazy now). I checked syslog around that time though Mar 6 06:29:50 gargamel kernel: [204255.678548] bcache-register: page allocation failure: order:7, mode:0x24080c0 and found nothing related to a cronjob or /dev/sdl disappearing and coming back. > Are there any intevening non-bcache lines indicating a disk was removed > (eg, bad usb cable) and re-added? Good question, none that I can find. > > > Do you have this patch? > > > https://bitbucket.org/ewheelerinc/linux/commits/a7044848050ac60e178798d20ea8a3ef2be36bc7?at=master > > > > I got the other patches you sent me last time, but didn't end up with > > this one, sorry if you sent it to me and I dropped it. > > I'll apply it now, thanks. > > All of the patches related to troubleshooting with you are here: > > https://bitbucket.org/ewheelerinc/linux/branch/v4.5-rc6-bcache-fixes > and here: > https://bitbucket.org/ewheelerinc/linux/branch/v4.5-rc7-bcache-fixes > > so make sure all 3 are applied. It might still OOM, but it shouldn't > crash if we got it all. Thanks. I just checked that I have all those paatches now. I will report back if I get more interesting output :) 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
