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Szmigiero" , Alex Williamson , =?utf-8?Q?C=C3=A9dric?= Le Goater Cc: Peter Xu , Paolo Bonzini , Avihai Horon , qemu-devel@nongnu.org Subject: Re: [PATCH 1/2] system/runstate: Allow adjustment of priority for VM state change handlers In-Reply-To: References: Date: Mon, 01 Jun 2026 10:26:47 -0300 Message-ID: <874ijmtmqw.fsf@suse.de> MIME-Version: 1.0 Content-Type: text/plain X-Rspamd-Action: no action X-Rspamd-Queue-Id: EED486B67F X-Spamd-Result: default: False [-4.51 / 50.00]; BAYES_HAM(-3.00)[99.99%]; NEURAL_HAM_LONG(-1.00)[-1.000]; R_DKIM_ALLOW(-0.20)[suse.de:s=susede2_rsa,suse.de:s=susede2_ed25519]; NEURAL_HAM_SHORT(-0.20)[-1.000]; MIME_GOOD(-0.10)[text/plain]; MX_GOOD(-0.01)[]; FUZZY_RATELIMITED(0.00)[rspamd.com]; RCVD_VIA_SMTP_AUTH(0.00)[]; RCVD_TLS_ALL(0.00)[]; ARC_NA(0.00)[]; MIME_TRACE(0.00)[0:+]; MISSING_XM_UA(0.00)[]; TO_DN_SOME(0.00)[]; RECEIVED_SPAMHAUS_BLOCKED_OPENRESOLVER(0.00)[2a07:de40:b281:106:10:150:64:167:received]; MID_RHS_MATCH_FROM(0.00)[]; RBL_SPAMHAUS_BLOCKED_OPENRESOLVER(0.00)[2a07:de40:b281:104:10:150:64:97:from]; FROM_EQ_ENVFROM(0.00)[]; FROM_HAS_DN(0.00)[]; RCPT_COUNT_SEVEN(0.00)[7]; RCVD_COUNT_TWO(0.00)[2]; TO_MATCH_ENVRCPT_ALL(0.00)[]; DBL_BLOCKED_OPENRESOLVER(0.00)[szmigiero.name:email,imap1.dmz-prg2.suse.org:rdns,imap1.dmz-prg2.suse.org:helo,oracle.com:email,suse.de:dkim,suse.de:email,suse.de:mid]; DKIM_SIGNED(0.00)[suse.de:s=susede2_rsa,suse.de:s=susede2_ed25519]; DKIM_TRACE(0.00)[suse.de:+] X-Rspamd-Server: rspamd1.dmz-prg2.suse.org Received-SPF: pass client-ip=195.135.223.130; envelope-from=farosas@suse.de; helo=smtp-out1.suse.de X-Spam_score_int: -43 X-Spam_score: -4.4 X-Spam_bar: ---- X-Spam_report: (-4.4 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_MED=-2.3, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: qemu development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org "Maciej S. Szmigiero" writes: > From: "Maciej S. Szmigiero" > > A future patch will need an ability to register qdev VM state change > handlers below and above the normal priority level for the registering > device qdev tree depth, but still properly ordered with respect to handlers > registered at other tree depths. > > To implement this split the priority argument passed to > qemu_add_vm_change_state_handler_prio_full() into two parts: > its 15 most significant bits will now carry the actual qdev tree depth > while the 16 least significant bits will now carry the caller provided > priority adjustment value. > > Although this will limit the qdev tree to a depth of 32k such high limit > shouldn't be a problem in practice. > > Signed-off-by: Maciej S. Szmigiero Reviewed-by: Fabiano Rosas