On Thu, Jul 26, 2018 at 5:28 PM Eric Blake <ebl...@redhat.com> wrote:
> On 07/26/2018 06:33 AM, Kevin Wolf wrote: > > The BLKDISCARD ioctl doesn't guarantee that the discarded blocks read as > > all-zero afterwards, so don't try to abuse it for zero writing. We try > > to only use this if BLKDISCARDZEROES tells us that it is safe, but this > > is unreliable on older kernels and a constant 0 in newer kernels. In > > For my own curiosity, which kernel commit switched to constant 0, so I > can read the rationale in that commit message? > This should help https://patchwork.kernel.org/patch/9903757/ Nir
