Messages in this thread | | | Date | Fri, 16 Jun 2017 22:39:52 +0200 | From | Dick Streefland <> | Subject | Re: autofs multi-map regression |
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On Friday 2017-06-16 12:03, Eric W. Biederman wrote: | Interesting... | | Can you test this on a stock 4.11 kernel? | | I definitely need a little bit more information to solve this. That | commit did not add any new error condidtions so I need to understand | what state you are getting yourself into that is affected by this | commit. | | Is there a chance you can post /proc/self/mountinfo from when this is | happening?
I've installed the mainline 4.11 kernel from:
http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.11/
and this kernel works correctly!
So either this issue was fixed in the meantime, or it is something specific to the Ubuntu kernel. I guess I should file a bug report with Ubuntu then?
I've also looked at /proc/self/mountinfo before and directly after the mount attempt. Here are the ext4 and autofs entries for the failing 4.4 kernel:
before: 23 0 8:2 / / rw,relatime shared:1 - ext4 /dev/sda2 rw,errors=remount-ro,data=ordered 41 19 0:34 / /proc/sys/fs/binfmt_misc rw,relatime shared:24 - autofs systemd-1 rw,fd=34,pgrp=1,timeout=0,minproto=5,maxproto=5,direct 46 23 8:4 / /loc rw,nosuid,nodev,noatime shared:30 - ext4 /dev/sda4 rw,block_validity,delalloc,barrier,user_xattr,acl 202 23 0:44 / /net rw,relatime shared:160 - autofs /etc/auto.net rw,fd=6,pgrp=1724,timeout=120,minproto=5,maxproto=5,indirect
after: 23 0 8:2 / / rw,relatime shared:1 - ext4 /dev/sda2 rw,errors=remount-ro,data=ordered 41 19 0:34 / /proc/sys/fs/binfmt_misc rw,relatime shared:24 - autofs systemd-1 rw,fd=34,pgrp=1,timeout=0,minproto=5,maxproto=5,direct 46 162 8:4 / /loc rw,nosuid,nodev,noatime shared:30 - ext4 /dev/sda4 rw,block_validity,delalloc,barrier,user_xattr,acl 202 23 0:44 / /net rw,relatime shared:160 - autofs /etc/auto.net rw,fd=6,pgrp=1724,timeout=120,minproto=5,maxproto=5,indirect 157 202 8:2 / /net/localhost rw,relatime shared:1 - ext4 /dev/sda2 rw,errors=remount-ro,data=ordered 161 157 0:47 / /net/localhost/loc rw,relatime shared:119 - autofs /etc/auto.net rw,fd=6,pgrp=1724,timeout=120,minproto=5,maxproto=5,offset 162 23 0:47 / /loc rw,relatime shared:119 - autofs /etc/auto.net rw,fd=6,pgrp=1724,timeout=120,minproto=5,maxproto=5,offset
And here the info for the working mainline 4.11 kernel:
before: 23 0 8:2 / / rw,relatime shared:1 - ext4 /dev/sda2 rw,errors=remount-ro,data=ordered 74 19 0:36 / /proc/sys/fs/binfmt_misc rw,relatime shared:56 - autofs systemd-1 rw,fd=35,pgrp=1,timeout=0,minproto=5,maxproto=5,direct,pipe_ino=12754 45 23 8:4 / /loc rw,nosuid,nodev,noatime shared:28 - ext4 /dev/sda4 rw,block_validity,delalloc,barrier,user_xattr,acl 208 23 0:46 / /net rw,relatime shared:164 - autofs /etc/auto.net rw,fd=6,pgrp=1545,timeout=120,minproto=5,maxproto=5,indirect,pipe_ino=26555
after: 23 0 8:2 / / rw,relatime shared:1 - ext4 /dev/sda2 rw,errors=remount-ro,data=ordered 74 19 0:36 / /proc/sys/fs/binfmt_misc rw,relatime shared:56 - autofs systemd-1 rw,fd=35,pgrp=1,timeout=0,minproto=5,maxproto=5,direct,pipe_ino=12754 45 175 8:4 / /loc rw,nosuid,nodev,noatime shared:28 - ext4 /dev/sda4 rw,block_validity,delalloc,barrier,user_xattr,acl 208 23 0:46 / /net rw,relatime shared:164 - autofs /etc/auto.net rw,fd=6,pgrp=1545,timeout=120,minproto=5,maxproto=5,indirect,pipe_ino=26555 162 208 8:2 / /net/localhost rw,relatime shared:1 - ext4 /dev/sda2 rw,errors=remount-ro,data=ordered 166 162 0:48 / /net/localhost/loc rw,relatime shared:122 - autofs /etc/auto.net rw,fd=6,pgrp=1545,timeout=120,minproto=5,maxproto=5,offset,pipe_ino=26555 167 23 0:48 / /loc rw,relatime shared:122 - autofs /etc/auto.net rw,fd=6,pgrp=1545,timeout=120,minproto=5,maxproto=5,offset,pipe_ino=26555 174 166 8:4 / /net/localhost/loc rw,nosuid,nodev,noatime shared:28 - ext4 /dev/sda4 rw,block_validity,delalloc,barrier,user_xattr,acl 175 167 8:4 / /loc rw,nosuid,nodev,noatime shared:28 - ext4 /dev/sda4 rw,block_validity,delalloc,barrier,user_xattr,acl
-- Dick
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