Re: [PATCH v4 5/8] vmcore: copy ELF note segments in the 2nd kernel per page vmcore objects

2013-05-07 Thread HATAYAMA Daisuke
(2013/05/08 0:08), Vivek Goyal wrote: On Tue, May 07, 2013 at 04:56:46PM +0900, HATAYAMA Daisuke wrote: (2013/04/30 4:36), Vivek Goyal wrote: On Sat, Apr 13, 2013 at 09:21:33AM +0900, HATAYAMA Daisuke wrote: [..] ELF notes are per-cpu, so total size of ELF note segments increases according

Re: [PATCH v4 5/8] vmcore: copy ELF note segments in the 2nd kernel per page vmcore objects

2013-05-07 Thread Vivek Goyal
On Tue, May 07, 2013 at 04:56:46PM +0900, HATAYAMA Daisuke wrote: > (2013/04/30 4:36), Vivek Goyal wrote: > >On Sat, Apr 13, 2013 at 09:21:33AM +0900, HATAYAMA Daisuke wrote: > > > >[..] > >>ELF notes are per-cpu, so total size of ELF note segments increases > >>according to the number of CPUs.

Re: [PATCH v4 5/8] vmcore: copy ELF note segments in the 2nd kernel per page vmcore objects

2013-05-07 Thread HATAYAMA Daisuke
(2013/04/30 4:36), Vivek Goyal wrote: On Sat, Apr 13, 2013 at 09:21:33AM +0900, HATAYAMA Daisuke wrote: [..] ELF notes are per-cpu, so total size of ELF note segments increases according to the number of CPUs. The current maximum number of CPUs on x86_64 is 5192, and there's already system

Re: [PATCH v4 5/8] vmcore: copy ELF note segments in the 2nd kernel per page vmcore objects

2013-05-07 Thread Vivek Goyal
On Tue, May 07, 2013 at 04:56:46PM +0900, HATAYAMA Daisuke wrote: (2013/04/30 4:36), Vivek Goyal wrote: On Sat, Apr 13, 2013 at 09:21:33AM +0900, HATAYAMA Daisuke wrote: [..] ELF notes are per-cpu, so total size of ELF note segments increases according to the number of CPUs. The current

Re: [PATCH v4 5/8] vmcore: copy ELF note segments in the 2nd kernel per page vmcore objects

2013-05-07 Thread HATAYAMA Daisuke
(2013/05/08 0:08), Vivek Goyal wrote: On Tue, May 07, 2013 at 04:56:46PM +0900, HATAYAMA Daisuke wrote: (2013/04/30 4:36), Vivek Goyal wrote: On Sat, Apr 13, 2013 at 09:21:33AM +0900, HATAYAMA Daisuke wrote: [..] ELF notes are per-cpu, so total size of ELF note segments increases according

Re: [PATCH v4 5/8] vmcore: copy ELF note segments in the 2nd kernel per page vmcore objects

2013-04-29 Thread Vivek Goyal
On Sat, Apr 13, 2013 at 09:21:33AM +0900, HATAYAMA Daisuke wrote: [..] > ELF notes are per-cpu, so total size of ELF note segments increases > according to the number of CPUs. The current maximum number of CPUs on > x86_64 is 5192, and there's already system with 4192 CPUs in SGI, > where total

Re: [PATCH v4 5/8] vmcore: copy ELF note segments in the 2nd kernel per page vmcore objects

2013-04-29 Thread Vivek Goyal
On Sat, Apr 13, 2013 at 09:21:33AM +0900, HATAYAMA Daisuke wrote: [..] ELF notes are per-cpu, so total size of ELF note segments increases according to the number of CPUs. The current maximum number of CPUs on x86_64 is 5192, and there's already system with 4192 CPUs in SGI, where total size

[PATCH v4 5/8] vmcore: copy ELF note segments in the 2nd kernel per page vmcore objects

2013-04-18 Thread HATAYAMA Daisuke
Copy ELF note segmnets in buffer on the 2nd kernel and the buffer is allocated on page boundary for the purpose of mmap. The reason why we don't allocate ELF note segments in the 1st kernel (old memory) on page boundary is to keep backward compatibility for old kernels, and one more reason is

[PATCH v4 5/8] vmcore: copy ELF note segments in the 2nd kernel per page vmcore objects

2013-04-18 Thread HATAYAMA Daisuke
Copy ELF note segmnets in buffer on the 2nd kernel and the buffer is allocated on page boundary for the purpose of mmap. The reason why we don't allocate ELF note segments in the 1st kernel (old memory) on page boundary is to keep backward compatibility for old kernels, and one more reason is