On 8/25/2025 5:59 PM, wangyufei wrote: > Hi everyone, > > We've been interested in this patch about parallelizing writeback [1] > and have been following its discussion and development. Our testing in > several application scenarios on mobile devices has shown significant > performance improvements. > Hi, Thanks for sharing this work. Could you clarify a few details about your test setup? - Which filesystem did you run these experiments on? - What were the specifics of the workload (number of threads, block size, I/O size)? - If you are using fio, can you please share the fio command. - How much RAM was available on the test system? - Can you share the performance improvement numbers you observed? That would help in understanding the impact of parallel writeback? I made similar modifications to dynamically configure the number of writeback threads in this experimental patch. Refer to patches 14 and 15: https://lore.kernel.org/all/20250807045706.2848-1-kundan.kumar@xxxxxxxxxxx/ The key difference is that this change also enables a reduction in the number of writeback threads. Thanks, Kundan >
