https://bugzilla.kernel.org/show_bug.cgi?id=86471 --- Comment #2 from Markus Königshaus <m.koenigshaus@xxxxxx> --- Hi Theodore, even after a very long wait, the performance remain so low. The performance is also low when you copy files. I have used dd, so I create only reproducible write access. I have now tested the ext3 FS, same result. After some debugging I found out, there is a delay in start_this_handle (look at the timing), with echo 5 > /sys/kernel/debug/jbd/jbd-debug I get: >> before mysqlshutdown: ... [ 40.400755] fs/jbd/transaction.c: (journal_stop, 1380): h_ref 2 -> 1 [ 40.400755] [ 40.400765] fs/jbd/transaction.c: (journal_stop, 1384): Handle df03e000 going down [ 40.400765] [ 40.400789] fs/jbd/transaction.c: (journal_start, 290): from journal_start [ 40.400789] [ 40.400801] fs/jbd/transaction.c: (start_this_handle, 110): New handle df03e000 going live. [ 40.400801] [ 40.400813] fs/jbd/transaction.c: (start_this_handle, 229): Handle df03e000 given 14 credits (total 21, free 14286) ... >> after mysqlshutdown: ... [ 61.383886] fs/jbd/transaction.c: (journal_stop, 1380): h_ref 2 -> 1 [ 61.383886] [ 61.383896] fs/jbd/transaction.c: (journal_stop, 1384): Handle df03e000 going down [ 61.383896] [ 61.393528] fs/jbd/transaction.c: (start_this_handle, 110): New handle df03e000 going live. [ 61.393528] [ 61.393541] fs/jbd/transaction.c: (start_this_handle, 229): Handle df03e000 given 14 credits (total 21, free 14271) ... I try to isolate the problem in more detail next week, I would welcome tips and help for my try. Regards, Markus -- You are receiving this mail because: You are watching the assignee of the bug.-- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
