Re: [PATCH v4 13/25] powernv/fadump: support copying multiple kernel memory regions

2019-08-14 Thread Hari Bathini
On 13/08/19 8:33 PM, Mahesh J Salgaonkar wrote: > On 2019-07-16 17:03:30 Tue, Hari Bathini wrote: >> Firmware uses 32-bit field for region size while copying/backing-up >> memory during MPIPL. So, the maximum copy size for a region would >> be a page less than 4GB (aligned to pagesize) but FADum

Re: [PATCH v4 13/25] powernv/fadump: support copying multiple kernel memory regions

2019-08-13 Thread Mahesh J Salgaonkar
On 2019-07-16 17:03:30 Tue, Hari Bathini wrote: > Firmware uses 32-bit field for region size while copying/backing-up > memory during MPIPL. So, the maximum copy size for a region would > be a page less than 4GB (aligned to pagesize) but FADump capture > kernel usually needs more memory than that t

[PATCH v4 13/25] powernv/fadump: support copying multiple kernel memory regions

2019-07-16 Thread Hari Bathini
Firmware uses 32-bit field for region size while copying/backing-up memory during MPIPL. So, the maximum copy size for a region would be a page less than 4GB (aligned to pagesize) but FADump capture kernel usually needs more memory than that to be preserved to avoid running into out of memory error