Regression V3.11-rc1 bisected: [readdir] convert procfs

From: Richard Genoud
Date: Mon Aug 12 2013 - 10:18:58 EST

Hi,

I've found something peculiar while I was testing v3.11:
There's a lot of directory missing (actually hiding) in /proc :

/proc/sys/, /proc/fs/, /proc/bus/ etc...
all the directories that are not PIDs are in "stealth mode":
they don't appear with an ls (nor a find), but I can list their contents.

I've bisecting that to the commit
f0c3b5093addc8bfe9fe3a5b01acb7ec7969eafa ( [readdir] convert procfs )

This happens on nfsroot, but also on UBIFS.

Here are my platform details:
- arm (at91sam9g35-ek)
- defconfig attached
- using uImage and at91sam9g35ek.dtb
- libuClibc-0.9.33.2.so


# ls -l /proc/
total 0
dr-xr-xr-x 7 root root 0 Dec 31 17:00 1/
dr-xr-xr-x 7 root root 0 Dec 31 17:00 121/
dr-xr-xr-x 7 root root 0 Dec 31 17:00 123/
dr-xr-xr-x 7 root root 0 Dec 31 17:00 125/
dr-xr-xr-x 7 root root 0 Dec 31 17:15 1306/
dr-xr-xr-x 7 root root 0 Dec 31 17:15 1307/
dr-xr-xr-x 7 root root 0 Dec 31 17:00 2/
dr-xr-xr-x 7 root root 0 Dec 31 17:00 236/
dr-xr-xr-x 7 root root 0 Dec 31 17:00 237/
dr-xr-xr-x 7 root root 0 Dec 31 17:00 242/
dr-xr-xr-x 7 root root 0 Dec 31 17:00 243/
dr-xr-xr-x 7 root root 0 Dec 31 17:00 244/
dr-xr-xr-x 7 root root 0 Dec 31 17:00 245/
dr-xr-xr-x 7 root root 0 Dec 31 17:00 3/
dr-xr-xr-x 7 root root 0 Dec 31 17:00 313/
dr-xr-xr-x 7 root root 0 Dec 31 17:00 314/
dr-xr-xr-x 7 root root 0 Dec 31 17:00 326/
dr-xr-xr-x 7 root root 0 Dec 31 17:00 328/
dr-xr-xr-x 7 root root 0 Dec 31 17:00 331/
dr-xr-xr-x 7 root root 0 Dec 31 17:00 361/
dr-xr-xr-x 7 root root 0 Dec 31 17:00 362/
dr-xr-xr-x 7 dbus dbus 0 Dec 31 17:00 364/
dr-xr-xr-x 7 root root 0 Dec 31 17:00 372/
dr-xr-xr-x 7 root root 0 Dec 31 17:00 376/
dr-xr-xr-x 7 root root 0 Dec 31 17:00 378/
dr-xr-xr-x 7 root root 0 Dec 31 17:00 389/
dr-xr-xr-x 7 root root 0 Dec 31 17:00 390/
dr-xr-xr-x 7 root root 0 Dec 31 17:00 5/
dr-xr-xr-x 7 root root 0 Dec 31 17:00 6/
dr-xr-xr-x 7 root root 0 Dec 31 17:00 7/
dr-xr-xr-x 7 root root 0 Dec 31 17:00 8/
dr-xr-xr-x 7 root root 0 Dec 31 17:00 9/
-r--r--r-- 1 root root 0 Dec 31 17:15 buddyinfo
-r--r--r-- 1 root root 0 Dec 31 17:15 cmdline
-r--r--r-- 1 root root 8478 Dec 31 17:15 config.gz
-r--r--r-- 1 root root 0 Dec 31 17:15 consoles
-r--r--r-- 1 root root 0 Dec 31 17:15 cpuinfo
-r--r--r-- 1 root root 0 Dec 31 17:15 crypto
-r--r--r-- 1 root root 0 Dec 31 17:15 devices
-r--r--r-- 1 root root 0 Dec 31 17:15 diskstats
-r--r--r-- 1 root root 0 Dec 31 17:15 filesystems
-r--r--r-- 1 root root 0 Dec 31 17:15 interrupts
-r--r--r-- 1 root root 0 Dec 31 17:15 kallsyms
-r--r--r-- 1 root root 0 Dec 31 17:15 key-users
-r-------- 1 root root 0 Dec 31 17:15 kmsg
-r-------- 1 root root 0 Dec 31 17:15 kpagecount
-r-------- 1 root root 0 Dec 31 17:15 kpageflags
-r--r--r-- 1 root root 0 Dec 31 17:15 loadavg
-r--r--r-- 1 root root 0 Dec 31 17:15 locks
-r--r--r-- 1 root root 0 Dec 31 17:15 meminfo
-r--r--r-- 1 root root 0 Dec 31 17:15 pagetypeinfo
-r--r--r-- 1 root root 0 Dec 31 17:15 partitions
lrwxrwxrwx 1 root root 0 Dec 31 17:00 self -> 1307/
-r-------- 1 root root 0 Dec 31 17:15 slabinfo
-r--r--r-- 1 root root 0 Dec 31 17:15 softirqs
-r--r--r-- 1 root root 0 Dec 31 17:15 stat
--w------- 1 root root 0 Dec 31 17:15 sysrq-trigger
-r--r--r-- 1 root root 0 Dec 31 17:15 timer_list
-r--r--r-- 1 root root 0 Dec 31 17:15 uptime
-r--r--r-- 1 root root 0 Dec 31 17:15 version
-r-------- 1 root root 0 Dec 31 17:15 vmallocinfo
-r--r--r-- 1 root root 0 Dec 31 17:15 vmstat
-r--r--r-- 1 root root 0 Dec 31 17:15 zoneinfo
# ls -ld /proc/sy*
--w------- 1 root root 0 Dec 31 17:15 /proc/sysrq-trigger
# ls -ld /proc/sys
dr-xr-xr-x 1 root root 0 Dec 31 17:00 /proc/sys/
# ls -l /proc/sys/
total 0
dr-xr-xr-x 1 root root 0 Dec 31 17:16 debug/
dr-xr-xr-x 1 root root 0 Dec 31 17:16 dev/
dr-xr-xr-x 1 root root 0 Dec 31 17:16 fs/
dr-xr-xr-x 1 root root 0 Dec 31 17:00 kernel/
dr-xr-xr-x 1 root root 0 Dec 31 17:00 net/
dr-xr-xr-x 1 root root 0 Dec 31 17:16 vm/
# uname -a
Linux LNS 3.10.0-rc6-00032-gf0c3b50 #34 Mon Aug 12 15:30:14 CEST 2013
armv5tejl GNU/Linux
# cat /proc/cmdline
console=ttyS0,115200 loglevel=8 ip=dhcp root=/dev/nfs
nfsroot=10.128.0.9:/nfsroot,v3



Best regards,
Richard.

Attachment: defconfig
Description: Binary data