Hi Kun, On Sat, Nov 14, 2020 at 5:18 AM yangerkun <yangerkun@xxxxxxxxxx> wrote: > While using ext4 with data=journal(3.10 kernel), we meet a problem that > we think may never happend... [...] Could you please confirm you mean 5.10-rc* kernel instead of 3.10? (It seems so as you mention a recent commit below.) Thanks! > For now, what I have seen that can dirty buffer directly is > ext4_page_mkwrite(64a9f1449950 ("ext4: data=journal: fixes for > ext4_page_mkwrite()")), and runing ext4_punch_hole with keep_size > /ext4_page_mkwrite parallel can trigger above warning easily. [...] -- Mauricio Faria de Oliveira