jbd2_log_wait_commit hangs

[yoav_rubin2]

powerpc linux 4.1.8-rt8 32bit p4080ds

After erasing and creating 15GB EXT4 fs (for nand flash), sync command occasionally hangs.

found out it hangs inside: jbd2_log_wait_commit().

I saw that many people encountered this problem and didn't find solution.

1. Is there any known fix for this hang?

2.  If not , is it safe to cancel journaling just for the ext4 fs and just for the sync during startup (rest of syncs will execute as usual)  

thanks

[yipingwang]

Hello yoav rubin,

Please refer to the fix of this problem

[PATCH] ext4/jbd2: don't wait (forever) for stale tid caused by wraparound 

Thanks,

Yiping