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envelope-from=MChang@suse.com; helo=EUR01-HE1-obe.outbound.protection.outlook.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/06/23 02:47:18 X-ACL-Warn: Detected OS = Windows NT kernel [generic] [fuzzy] X-Spam_score_int: -35 X-Spam_score: -3.6 X-Spam_bar: --- X-Spam_report: (-3.6 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, MSGID_FROM_MTA_HEADER=0.001, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H2=-1, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001 autolearn=_AUTOLEARN X-Spam_action: no action X-BeenThere: grub-devel@gnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: The development of GNU GRUB List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 23 Jun 2020 06:47:31 -0000 On Mon, Jun 22, 2020 at 10:16:49PM -0400, Mike Gilbert wrote: > On Sun, Jun 21, 2020 at 2:56 PM Eli Schwartz wrote: > > But anyway this isn't true. There are valid reasons to reinstall grub on > > old systems, in which case you are most likely not benefiting from zstd > > support one way or another, but in this case, rerunning grub-install > > destroys the working bootloader code and fails to replace. > > This sounds like a bug/defect in grub-install. Ideally, it would look > at the size of the embedding area, and abort early if it is too small. > This should happen before files are copied to /boot/grub, but > currently it is done afterward. Even though the system can stay bootable, it cannot receive any grub updates afterward, thus breaking the principle of backward compatibilty that new build couldn't run at all on an existing system running old grub. Thanks, Michael > > _______________________________________________ > Grub-devel mailing list > Grub-devel@gnu.org > https://lists.gnu.org/mailman/listinfo/grub-devel