Am 14.04.2025 um 17:34 hat Stefan Hajnoczi geschrieben: > On Fri, Apr 11, 2025 at 10:15:13AM +0200, Hanna Czenczek wrote: > > On 10.04.25 20:41, Stefan Hajnoczi wrote: > > > Populate the pdiscard_alignment block limit so the block layer is able > > > align discard requests correctly. > > > > > > Signed-off-by: Stefan Hajnoczi <stefa...@redhat.com> > > > --- > > > block/file-posix.c | 56 +++++++++++++++++++++++++++++++++++++++++++++- > > > 1 file changed, 55 insertions(+), 1 deletion(-) > > > > Ah, I didn’t know sysfs is actually fair game. Should we not also get the > > maximum discard length then, too? > > The maximum discard length behaves differently: the Linux block layer > splits requests according to the maximum discard length. If the guest > submits a discard request that is too large for the host, the host block > layer will split it and the request succeeds. That is why I didn't make > any changes to the maximum discard length in this series.
Do we need to do something with it for SCSI passthrough? Similar to how we expose bs->bl.max_hw_transfer/iov in the block limits VPD page? Kevin
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