Re: [PATCH v7 4/4] kexec_file: Load kernel at top of system RAM if required

2018-07-26 Thread Baoquan He
On 07/26/18 at 04:01pm, Michal Hocko wrote: > On Thu 26-07-18 21:37:05, Baoquan He wrote: > > On 07/26/18 at 03:14pm, Michal Hocko wrote: > > > On Thu 26-07-18 15:12:42, Michal Hocko wrote: > > > > On Thu 26-07-18 21:09:04, Baoquan He wrote: > > > > > On 07/26/18 at 02:59pm, Michal Hocko wrote: > >

Re: [PATCH v7 4/4] kexec_file: Load kernel at top of system RAM if required

2018-07-26 Thread Michal Hocko
On Thu 26-07-18 21:37:05, Baoquan He wrote: > On 07/26/18 at 03:14pm, Michal Hocko wrote: > > On Thu 26-07-18 15:12:42, Michal Hocko wrote: > > > On Thu 26-07-18 21:09:04, Baoquan He wrote: > > > > On 07/26/18 at 02:59pm, Michal Hocko wrote: > > > > > On Wed 25-07-18 14:48:13, Baoquan He wrote: > >

Re: [PATCH v7 4/4] kexec_file: Load kernel at top of system RAM if required

2018-07-26 Thread Baoquan He
On 07/26/18 at 03:14pm, Michal Hocko wrote: > On Thu 26-07-18 15:12:42, Michal Hocko wrote: > > On Thu 26-07-18 21:09:04, Baoquan He wrote: > > > On 07/26/18 at 02:59pm, Michal Hocko wrote: > > > > On Wed 25-07-18 14:48:13, Baoquan He wrote: > > > > > On 07/23/18 at 04:34pm, Michal Hocko wrote: > >

Re: [PATCH v7 4/4] kexec_file: Load kernel at top of system RAM if required

2018-07-26 Thread Michal Hocko
On Thu 26-07-18 15:12:42, Michal Hocko wrote: > On Thu 26-07-18 21:09:04, Baoquan He wrote: > > On 07/26/18 at 02:59pm, Michal Hocko wrote: > > > On Wed 25-07-18 14:48:13, Baoquan He wrote: > > > > On 07/23/18 at 04:34pm, Michal Hocko wrote: > > > > > On Thu 19-07-18 23:17:53, Baoquan He wrote: > >

Re: [PATCH v7 4/4] kexec_file: Load kernel at top of system RAM if required

2018-07-26 Thread Michal Hocko
On Thu 26-07-18 21:09:04, Baoquan He wrote: > On 07/26/18 at 02:59pm, Michal Hocko wrote: > > On Wed 25-07-18 14:48:13, Baoquan He wrote: > > > On 07/23/18 at 04:34pm, Michal Hocko wrote: > > > > On Thu 19-07-18 23:17:53, Baoquan He wrote: > > > > > Kexec has been a formal feature in our distro, an

Re: [PATCH v7 4/4] kexec_file: Load kernel at top of system RAM if required

2018-07-26 Thread Baoquan He
On 07/26/18 at 02:59pm, Michal Hocko wrote: > On Wed 25-07-18 14:48:13, Baoquan He wrote: > > On 07/23/18 at 04:34pm, Michal Hocko wrote: > > > On Thu 19-07-18 23:17:53, Baoquan He wrote: > > > > Kexec has been a formal feature in our distro, and customers owning > > > > those kind of very large ma

Re: [PATCH v7 4/4] kexec_file: Load kernel at top of system RAM if required

2018-07-26 Thread Michal Hocko
On Wed 25-07-18 14:48:13, Baoquan He wrote: > On 07/23/18 at 04:34pm, Michal Hocko wrote: > > On Thu 19-07-18 23:17:53, Baoquan He wrote: > > > Kexec has been a formal feature in our distro, and customers owning > > > those kind of very large machine can make use of this feature to speed > > > up t

Re: [PATCH v7 4/4] kexec_file: Load kernel at top of system RAM if required

2018-07-24 Thread Baoquan He
On 07/23/18 at 04:34pm, Michal Hocko wrote: > On Thu 19-07-18 23:17:53, Baoquan He wrote: > > Kexec has been a formal feature in our distro, and customers owning > > those kind of very large machine can make use of this feature to speed > > up the reboot process. On uefi machine, the kexec_file loa

Re: [PATCH v7 4/4] kexec_file: Load kernel at top of system RAM if required

2018-07-24 Thread Baoquan He
Hi Andrew, On 07/19/18 at 12:44pm, Andrew Morton wrote: > On Thu, 19 Jul 2018 23:17:53 +0800 Baoquan He wrote: > > > As far as I can tell, the above is the whole reason for the patchset, > > > yes? To avoid confusing users. > > > > > > In fact, it's not just trying to avoid confusing users. Ke

Re: [PATCH v7 4/4] kexec_file: Load kernel at top of system RAM if required

2018-07-23 Thread Michal Hocko
On Thu 19-07-18 23:17:53, Baoquan He wrote: > Kexec has been a formal feature in our distro, and customers owning > those kind of very large machine can make use of this feature to speed > up the reboot process. On uefi machine, the kexec_file loading will > search place to put kernel under 4G from

Re: [PATCH v7 4/4] kexec_file: Load kernel at top of system RAM if required

2018-07-19 Thread Andrew Morton
On Thu, 19 Jul 2018 23:17:53 +0800 Baoquan He wrote: > Hi Andrew, > > On 07/18/18 at 03:33pm, Andrew Morton wrote: > > On Wed, 18 Jul 2018 10:49:44 +0800 Baoquan He wrote: > > > > > For kexec_file loading, if kexec_buf.top_down is 'true', the memory which > > > is used to load kernel/initrd/pu

Re: [PATCH v7 4/4] kexec_file: Load kernel at top of system RAM if required

2018-07-19 Thread Baoquan He
Hi Andrew, On 07/18/18 at 03:33pm, Andrew Morton wrote: > On Wed, 18 Jul 2018 10:49:44 +0800 Baoquan He wrote: > > > For kexec_file loading, if kexec_buf.top_down is 'true', the memory which > > is used to load kernel/initrd/purgatory is supposed to be allocated from > > top to down. This is wha

Re: [PATCH v7 4/4] kexec_file: Load kernel at top of system RAM if required

2018-07-18 Thread Andrew Morton
On Wed, 18 Jul 2018 10:49:44 +0800 Baoquan He wrote: > For kexec_file loading, if kexec_buf.top_down is 'true', the memory which > is used to load kernel/initrd/purgatory is supposed to be allocated from > top to down. This is what we have been doing all along in the old kexec > loading interface

[PATCH v7 4/4] kexec_file: Load kernel at top of system RAM if required

2018-07-17 Thread Baoquan He
For kexec_file loading, if kexec_buf.top_down is 'true', the memory which is used to load kernel/initrd/purgatory is supposed to be allocated from top to down. This is what we have been doing all along in the old kexec loading interface and the kexec loading is still default setting in some distrib