Open hanshu830 opened 3 years ago
So do we have plan to update OP-TEE Driver more friendly with linux freezer ?
Patches are welcome! I can help reviewing.
Patches are welcome! I can help reviewing.
Okay, I will try on this.
Meanwhile, update related information regarding to this issue.
cat << EOF > issue82.sh
#!/bin/sh
#
# Since open session will use RPC call, here raise more open session
# the duplicate rate will be more higher.
#
xtest 4001 &
xtest 4002 &
xtest 4003 &
# Platform specific wake up source
echo +10 > /sys/class/rtc/rtc0/wakealarm
# Raise system sleep
echo mem > /sys/power/state
[ 41.234263] Freezing user space processes ...
[ 61.241939] Freezing of tasks failed after 20.003 seconds (3 tasks refusing to freeze, wq_busy=0):
[ 61.250801] xtest R running task 0 1915 1914 0x00000009
[ 61.257754] Call trace:
[ 61.260162] [<ffffff8008085a94>] __switch_to+0xa4/0xb8
[ 61.265237] [< (null)>] (null)
[ 61.269878] xtest D 0 1916 1914 0x00000001
[ 61.275295] Call trace:
[ 61.277704] [<ffffff8008085a94>] __switch_to+0xa4/0xb8
[ 61.282783] [<ffffff8008a05a70>] __schedule+0x1a8/0x5c8
[ 61.287940] [<ffffff8008a05ebc>] schedule+0x2c/0x90
[ 61.292756] [<ffffff8008a093c8>] schedule_timeout+0x1b0/0x298
[ 61.298433] [<ffffff8008a06b90>] wait_for_common+0x98/0x140
[ 61.303939] [<ffffff8008a06c4c>] wait_for_completion+0x14/0x20
[ 61.309701] [<ffffff8008794554>] optee_handle_rpc+0x45c/0x4f0
[ 61.315374] [<ffffff8008793984>] optee_do_call_with_arg+0xe4/0xf8
[ 61.321394] [<ffffff8008793b74>] optee_open_session+0xe4/0x1b0
[ 61.327158] [<ffffff800879206c>] tee_ioctl+0xbc4/0xd58
[ 61.332232] [<ffffff80081aef6c>] do_vfs_ioctl+0xa4/0x7b0
[ 61.337476] [<ffffff80081af6bc>] SyS_ioctl+0x44/0x78
@jenswi-linaro
Just create a pull request #84, not sure this is enough, please help to review, thanks!
Hello, I was just encountered an issue with CA break linux system suspend operation. Linux freezer reports the corresponding CA process can't be froze. Here is the scenario:
I just noted that linux freezer has some help functions to avoid this happened(refer to include/linux/freezer.h). e.g.
Check with the latest OP-TEE Driver seems doesn't utilize this kind of help function. Not sure this is the correct way or OP-TEE Driver has other consideration of this. So do we have plan to update OP-TEE Driver more friendly with linux freezer ?
Thanks!