On 06/05/2019 13:50, Song Liu wrote: > [...] > IIUC, we need this for all raid types. Is it possible to fix that in md.c so > all types get the fix? > > Thanks, > Song > Hi Song, thanks again for reviewing my code and provide input, much appreciated! I understand this could in theory affects all the RAID levels, but in practice I don't think it'll happen. RAID0 is the only "blind" mode of RAID, in the sense it's the only one that doesn't care at all with failures. In fact, this was the origin of my other thread [0], regarding the change of raid0's behavior in error cases..because it currently does not care with members being removed and rely only in filesystem failures (after submitting many BIOs to the removed device). That said, in this change I've only took care of raid0, since in my understanding the other levels won't submit BIOs to dead devices; we can experiment that to see if it's true. But I'd be happy to change all other levels also if you think it's appropriate (or a simple generic change to md.c if it is enough). Do you think we could go ahead with this change, and further improve that (to cover all raid cases if necessary)? Cheers, Guilherme [0] https://marc.info/?l=linux-raid&m=155562509905735
