On 10/05/2016 16:16, James Bottomley wrote: > > If "is performed" just means "completes", maybe with an error, the > > application would have to resubmit write requests and then try to > > flush the write cache again. > > > > I'm not aware of applications that keep acknowledged write data > > around until the cache flush completion in order to retry writes. > > I think you may be misunderstanding the nature of the returned error. > It will be permanent and fatal and usually signal that the device has > a failed sector that can't be remapped and so the device itself has for > most purposes failed. The only recovery is if you happen to have RAID, > in which case the RAID layer will mostly take care of it.
What about a SPACE ALLOCATION FAILED error or a similar error that can be fixed by administrator actions (or just by a concurrent process doing an UNMAP)? Would a subsequent cache flush cause data loss? Paolo -- To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
