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Fri, 25 Sep 2026 00:49:34 -0700 (PDT) Date: Fri, 25 Sep 2026 09:49:32 +0200 From: Petr Mladek To: Song Liu Cc: Yafang Shao , jpoimboe@kernel.org, jikos@kernel.org, mbenes@suse.cz, joe.lawrence@redhat.com, live-patching@vger.kernel.org Subject: Re: [PATCH v9 0/9] livepatch: Add support for scoped atomic replace Message-ID: References: <20260913024228.72317-1-laoar.shao@gmail.com> Precedence: bulk X-Mailing-List: live-patching@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: On Thu 2026-09-24 13:56:32, Song Liu wrote: > Hi folks, > > Do we have pending comments/changes for this set? If not, can we land this > soon, so that it can go upstream in the upcoming merge window? I still have to review this last version. It is getting on top of my TODO list but... Anyway, my main concern is breaking the backward compatibility. I assumed that we would discuss this during the micro conference at Plumbers first. Best Regards, Petr > Thanks, > Song > > On Sat, Sep 12, 2026 at 7:43 PM Yafang Shao wrote: > > > > Atomic replacement is currently all-or-nothing: a livepatch with > > "replace" set either atomically replaces all previously installed > > livepatches, or - with "replace" disabled - it replaces none. There > > is no way to atomically replace only a selected set of livepatches > > while keeping the rest running untouched. > > > > We previously proposed a BPF+livepatch method to enable rapid > > experimentation with new kernel features without interrupting production > > workloads: > > > > https://lore.kernel.org/live-patching/20260402092607.96430-1-laoar.shao@gmail.com/ > > > > In the resulting discussion, Song and Petr suggested that it should be > > possible to selectively replace or skip individual livepatches. > > > > This patchset introduces a more flexible model using two new fields in > > struct klp_patch: > [...]