Hello Honza, This is a solution that uses dquot_srcu to avoid race condition between dqput() and dquot_mark_dquot_dirty(). I performed a 24+h fault injection stress test (6 VMs, 4 test threads per VM) and have not found any problems. And I tested the performance based on the latest mainline (6aeadf7896bf), the patch set did not lead to performance degradation, and even a little bit of improvement. V1->V2: Modify the solution to use dquot_srcu. Baokun Li (7): quota: factor out dquot_write_dquot() quota: add new global dquot list releasing_dquots quota: rename dquot_active() to inode_dquot_active() quota: add new helper dquot_active() quota: fix dqput() to follow the guarantees dquot_srcu should provide quota: simplify drop_dquot_ref() quota: remove unused function put_dquot_list() fs/quota/dquot.c | 237 +++++++++++++++++++++++++++-------------------- 1 file changed, 134 insertions(+), 103 deletions(-) -- 2.31.1
