Hi Kuai, Thanks for the patchset, as you mentioned both both hung problem regarding raid5 bitmap, just want to get confirmation, will this patchset fix the hung or just a performance improvement/code cleanup? In patch4, as you removed the set/clear bit STRIPE_BITMAP_PENDING, I think you should also remove the test_bit line in stripe_can_batch, also the definition enum in raif5.h and the few lines in comments in __add_stripe_bio, same for the line in break_stripe_batch_list. Regards! Jinpu Wang @ IONOS