Hello Honza, This is a solution that uses dquot_srcu to avoid race condition between dqput() and dquot_mark_dquot_dirty(). I performed a 12+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 next branch (5c875096d590), this patch set didn't degrade performance, but rather had a ~5% improvement. V1->V2: Modify the solution to use dquot_srcu. V2->V3: Merge some patches, optimize descriptions. Simplify solutions, and fix some spelling errors. Baokun Li (5): quota: factor out dquot_write_dquot() quota: rename dquot_active() to inode_quota_active() quota: add new helper dquot_active() quota: fix dqput() to follow the guarantees dquot_srcu should provide quota: simplify drop_dquot_ref() fs/quota/dquot.c | 244 ++++++++++++++++++++++++----------------------- 1 file changed, 125 insertions(+), 119 deletions(-) -- 2.31.1
