Il 18/07/2013 10:17, Peter Lieven ha scritto: > > maybe i have missed it in your patches, but would it be also possible to issue > DISCARDZEROES ioctl on linux to return zero status for block devices also?
I think that would belong in your patches. Once we have discard_zeroes, we can use it as you suggested. It is a good occasion to ask Linux developers for clarifications about the meaning of discard_zeroes in the presence of misaligned requests. But because of legacy, we might need to query the kernel for the granularity ourselves---which is ugly because it is not available through a ioctl, only sysfs. Paolo
