Re: [PATCH v7 2/2] mm: replace hardcoded 3% with admin_reserve_pages knob

2013-04-08 Thread Andrew Shewmaker
On Sat, Apr 6, 2013 at 6:48 PM, Simon Jeons wrote: > Hi Andrew, > > On 04/05/2013 11:02 PM, Andrew Shewmaker wrote: >> >> On Wed, Apr 3, 2013 at 9:50 PM, Simon Jeons wrote: FAQ >> ... * How do you calculate a minimum useful reserve? A user or the admin n

Re: [PATCH v7 2/2] mm: replace hardcoded 3% with admin_reserve_pages knob

2013-04-06 Thread Simon Jeons
Hi Andrew, On 04/05/2013 11:02 PM, Andrew Shewmaker wrote: On Wed, Apr 3, 2013 at 9:50 PM, Simon Jeons wrote: FAQ ... * How do you calculate a minimum useful reserve? A user or the admin needs enough memory to login and perform recovery operations, which includes, at a minimum:

Re: [PATCH v7 2/2] mm: replace hardcoded 3% with admin_reserve_pages knob

2013-04-05 Thread Andrew Shewmaker
On Wed, Apr 3, 2013 at 9:50 PM, Simon Jeons wrote: >> FAQ >> ... >> * How do you calculate a minimum useful reserve? >> >> A user or the admin needs enough memory to login and perform >> recovery operations, which includes, at a minimum: >> >> sshd or login + bash (or some other shel

Re: [PATCH v7 2/2] mm: replace hardcoded 3% with admin_reserve_pages knob

2013-04-03 Thread Simon Jeons
Hi Andrew, On 03/25/2013 09:42 PM, Andrew Shewmaker wrote: Add an admin_reserve_kbytes knob to allow admins to change the hardcoded memory reserve to something other than 3%, which may be multiple gigabytes on large memory systems. Only about 8MB is necessary to enable recovery in the default mod

[PATCH v7 2/2] mm: replace hardcoded 3% with admin_reserve_pages knob

2013-03-25 Thread Andrew Shewmaker
Add an admin_reserve_kbytes knob to allow admins to change the hardcoded memory reserve to something other than 3%, which may be multiple gigabytes on large memory systems. Only about 8MB is necessary to enable recovery in the default mode, and only a few hundred MB are required even when overcommi