Re: [PATCH v2 1/1] kexec: dump kmessage before machine_kexec

2021-01-28 Thread Pavel Tatashin
On Thu, Jan 28, 2021 at 3:01 PM Eric W. Biederman wrote: > > Pavel Tatashin writes: > > > kmsg_dump(KMSG_DUMP_SHUTDOWN) is called before > > machine_restart(), machine_halt(), machine_power_off(), the only one that > > is missing is machine_kexec(). > > > > The dmesg output that it contains can

Re: [PATCH v2 1/1] kexec: dump kmessage before machine_kexec

2021-01-28 Thread Eric W. Biederman
Pavel Tatashin writes: > kmsg_dump(KMSG_DUMP_SHUTDOWN) is called before > machine_restart(), machine_halt(), machine_power_off(), the only one that > is missing is machine_kexec(). > > The dmesg output that it contains can be used to study the shutdown > performance of both kernel and systemd

Re: [PATCH v2 1/1] kexec: dump kmessage before machine_kexec

2021-01-27 Thread Baoquan He
On 01/26/21 at 03:41pm, Pavel Tatashin wrote: > kmsg_dump(KMSG_DUMP_SHUTDOWN) is called before > machine_restart(), machine_halt(), machine_power_off(), the only one that > is missing is machine_kexec(). > > The dmesg output that it contains can be used to study the shutdown > performance of

[PATCH v2 1/1] kexec: dump kmessage before machine_kexec

2021-01-26 Thread Pavel Tatashin
kmsg_dump(KMSG_DUMP_SHUTDOWN) is called before machine_restart(), machine_halt(), machine_power_off(), the only one that is missing is machine_kexec(). The dmesg output that it contains can be used to study the shutdown performance of both kernel and systemd during kexec reboot. Here is example