On 2017/6/27 下午8:04, tang.junhui@xxxxxxxxxx wrote: > Hello Eric, Coly, > > I use a 1400G SSD device a bcache cache device, > and attach with 10 back-end devices, > and run random small write IOs, > when gc works, It takes about 15 seconds, > and the up layer application IOs was suspended at this time, > How could we bear such a long time IO stopping? > Is there any way we can avoid this problem? > > I am very anxious about this question, any comment would be valuable. I encounter same situation too. Hmm, I assume there are some locking issue here, to prevent application to send request and insert keys in LSM tree, no matter in writeback or writethrough mode. This is a lazy and fast response, I need to check the code then provide an accurate reply :-) -- Coly Li -- To unsubscribe from this list: send the line "unsubscribe linux-bcache" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
