[Bug 512321] Re: please backport devtmpfs to the lucid linux-imx51 kernel tree

[Bryan Wu]

Ogra,

I already cherry picked 2 devtmpfs patches to my fsl-imx51 git branch:
http://kernel.ubuntu.com/git?p=roc/ubuntu-lucid.git;a=shortlog;h=refs/heads/lp512321_devtmpfs

And please download the kernel package here to help me test:
http://people.canonical.com/~roc/kernel/lp512321_devtmpfs/

Here is some test on my side:
--
roc at babbage:~$ dmesg | head
Initializing cgroup subsys cpuset
Initializing cgroup subsys cpu
Linux version 2.6.31-602-imx51 (root at roc-desktop) (gcc version 4.3.3 (Sourcery G++ Lite 2009q1-203) ) #4 Tue Jan 26 11:27:08 CST 2010 (Ubuntu 2.6.31-602.4-imx51)
CPU: ARMv7 Processor [412fc081] revision 1 (ARMv7), cr=10c53c7f
CPU: VIPT nonaliasing data cache, VIPT nonaliasing instruction cache
Machine: Freescale MX51 Babbage Board
Memory policy: ECC disabled, Data cache writeback
On node 0 totalpages: 122880
free_area_init_node: node 0, pgdat c061cce4, node_mem_map c0692000
  DMA zone: 128 pages used for memmap
roc at babbage:~$ df
Filesystem           1K-blocks      Used Available Use% Mounted on
/dev/sda1            152459812   2446924 142268356   2% /
none                    234340     21244    213096  10% /dev
none                    239172      1164    238008   1% /dev/shm
none                    239172        84    239088   1% /var/run
none                    239172         0    239172   0% /var/lock
none                    239172         0    239172   0% /lib/init/rw
roc at babbage:~$ cat /proc/mounts 
rootfs / rootfs rw 0 0
none /sys sysfs rw,nosuid,nodev,noexec,relatime 0 0
none /proc proc rw,nosuid,nodev,noexec,relatime 0 0
none /dev devtmpfs rw,relatime,size=234340k,nr_inodes=58585,mode=755 0 0
none /dev/.bootchart/proc proc rw,relatime 0 0
/dev/disk/by-uuid/fd8c99d5-8e53-4d99-9d4e-75b8c96e7b94 / ext4 rw,relatime,errors=remount-ro,barrier=1,data=ordered 0 0
none /sys/fs/fuse/connections fusectl rw,relatime 0 0
none /sys/kernel/debug debugfs rw,relatime 0 0
none /sys/kernel/security securityfs rw,relatime 0 0
none /dev/pts devpts rw,nosuid,noexec,relatime,gid=5,mode=620,ptmxmode=000 0 0
none /dev/shm tmpfs rw,nosuid,nodev,relatime 0 0
none /var/run tmpfs rw,nosuid,relatime,mode=755 0 0
none /var/lock tmpfs rw,nosuid,nodev,noexec,relatime 0 0
none /lib/init/rw tmpfs rw,nosuid,relatime,mode=755 0 0
binfmt_misc /proc/sys/fs/binfmt_misc binfmt_misc rw,nosuid,nodev,noexec,relatime 0 0
gvfs-fuse-daemon /home/roc/.gvfs fuse.gvfs-fuse-daemon rw,nosuid,nodev,relatime,user_id=1000,group_id=1000 0 0
roc at babbage:~$ sudo mount -t devtmpfs -o mode=0755 none dev                                                                                                                                                        
[sudo] password for roc: 
roc at babbage:~$ df
Filesystem           1K-blocks      Used Available Use% Mounted on
/dev/sda1            152459812   2447320 142267960   2% /
none                    234340     22336    212004  10% /dev
none                    239172      1164    238008   1% /dev/shm
none                    239172        84    239088   1% /var/run
none                    239172         0    239172   0% /var/lock
none                    239172         0    239172   0% /lib/init/rw
none                    234340     22336    212004  10% /home/roc/dev
roc at babbage:~$ cd dev/
roc at babbage:~/dev$ ls
apm_bios         loop2               ram10   snd     tty26  tty48    uio0
binder           loop3               ram11   stderr  tty27  tty49    urandom
block            loop4               ram12   stdin   tty28  tty5     vcs
bus              loop5               ram13   stdout  tty29  tty50    vcs1
char             loop6               ram14   tty     tty3   tty51    vcs2
console          loop7               ram15   tty0    tty30  tty52    vcs3
cpu_dma_latency  mapper              ram2    tty1    tty31  tty53    vcs4
disk             mem                 ram3    tty10   tty32  tty54    vcs5
ecryptfs         mmcblk0             ram4    tty11   tty33  tty55    vcs6
fb0              mmcblk0p1           ram5    tty12   tty34  tty56    vcs7
fb1              mmcblk0p2           ram6    tty13   tty35  tty57    vcsa
fb2              mxc_iim             ram7    tty14   tty36  tty58    vcsa1
fd               mxc_ipu             ram8    tty15   tty37  tty59    vcsa2
full             mxc_vpu             ram9    tty16   tty38  tty6     vcsa3
fuse             network_latency     random  tty17   tty39  tty60    vcsa4
hidraw0          network_throughput  rfkill  tty18   tty4   tty61    vcsa5
i2c-0            null                rtc0    tty19   tty40  tty62    vcsa6
i2c-1            pktcdvd             sahara  tty2    tty41  tty63    vcsa7
i2c-3            ppp                 sda     tty20   tty42  tty7     watchdog
input            psaux               sda1    tty21   tty43  tty8     zero
kmsg             ptmx                sda2    tty22   tty44  tty9
log              pts                 sda5    tty23   tty45  ttymxc0
loop0            ram0                sg0     tty24   tty46  ttymxc1
loop1            ram1                shm     tty25   tty47  ttymxc2
roc at babbage:~/dev$ cd ..
--

Cheers,
-Bryan

-- 
please backport devtmpfs to the lucid linux-imx51 kernel tree
https://bugs.launchpad.net/bugs/512321
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