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See the cross-post cover letter for more details: https://www.redhat.com/archives/libguestfs/2019-August/msg00322.html Based-on: https://lists.gnu.org/archive/html/qemu-devel/2019-08/msg04805.html [Andrey Shinkevich block: workaround for unaligned byte range in fallocate()] Eric Blake (5): nbd: Improve per-export flag handling in server nbd: Prepare for NBD_CMD_FLAG_FAST_ZERO nbd: Implement client use of NBD FAST_ZERO nbd: Implement server use of NBD FAST_ZERO nbd: Tolerate m...

...AM, Vladimir Sementsov-Ogievskiy wrote: > 23.08.2019 17:37, Eric Blake wrote: >> See the cross-post cover letter for more details: >> https://www.redhat.com/archives/libguestfs/2019-August/msg00322.html >> >> Based-on: https://lists.gnu.org/archive/html/qemu-devel/2019-08/msg04805.html >> [Andrey Shinkevich block: workaround for unaligned byte range in fallocate()] > > I assume, I can look at git://repo.or.cz/qemu/ericb.git fast-zero branch? Yes, I posted a fast-zero branch for all four projects that I touched (with the obvious similar URLs). They might have no...

This is a cover letter to a series of patches being proposed in tandem to four different projects: - nbd: Document a new NBD_CMD_FLAG_FAST_ZERO command flag - qemu: Implement the flag for both clients and server - libnbd: Implement the flag for clients - nbdkit: Implement the flag for servers, including the nbd passthrough client If you want to test the patches together, I've pushed a