Re: [PATCH v4 1/2] arm64: Introduce IRQ stack

2015-10-08 Thread Pratyush Anand
Hi Jungseok, On 08/10/2015:11:32:43 PM, Jungseok Lee wrote: > On Oct 8, 2015, at 7:25 PM, Pratyush Anand wrote: > > Hi Jungseok, > > Hi Pratyush, > > > > > On 07/10/2015:03:28:11 PM, Jungseok Lee wrote: > >> Currently, kernel context and interrupts are handled using a single > >> kernel stack

Re: [PATCH v4 1/2] arm64: Introduce IRQ stack

2015-10-08 Thread Jungseok Lee
On Oct 8, 2015, at 7:25 PM, Pratyush Anand wrote: > Hi Jungseok, Hi Pratyush, > > On 07/10/2015:03:28:11 PM, Jungseok Lee wrote: >> Currently, kernel context and interrupts are handled using a single >> kernel stack navigated by sp_el1. This forces a system to use 16KB >> stack, not 8KB one.

Re: [PATCH v4 1/2] arm64: Introduce IRQ stack

2015-10-08 Thread Pratyush Anand
Hi Jungseok, On 07/10/2015:03:28:11 PM, Jungseok Lee wrote: > Currently, kernel context and interrupts are handled using a single > kernel stack navigated by sp_el1. This forces a system to use 16KB > stack, not 8KB one. This restriction makes low memory platforms suffer > from memory pressure

Re: [PATCH v4 1/2] arm64: Introduce IRQ stack

2015-10-08 Thread Pratyush Anand
Hi Jungseok, On 07/10/2015:03:28:11 PM, Jungseok Lee wrote: > Currently, kernel context and interrupts are handled using a single > kernel stack navigated by sp_el1. This forces a system to use 16KB > stack, not 8KB one. This restriction makes low memory platforms suffer > from memory pressure

Re: [PATCH v4 1/2] arm64: Introduce IRQ stack

2015-10-08 Thread Jungseok Lee
On Oct 8, 2015, at 7:25 PM, Pratyush Anand wrote: > Hi Jungseok, Hi Pratyush, > > On 07/10/2015:03:28:11 PM, Jungseok Lee wrote: >> Currently, kernel context and interrupts are handled using a single >> kernel stack navigated by sp_el1. This forces a system to use 16KB >> stack, not 8KB one.

Re: [PATCH v4 1/2] arm64: Introduce IRQ stack

2015-10-08 Thread Pratyush Anand
Hi Jungseok, On 08/10/2015:11:32:43 PM, Jungseok Lee wrote: > On Oct 8, 2015, at 7:25 PM, Pratyush Anand wrote: > > Hi Jungseok, > > Hi Pratyush, > > > > > On 07/10/2015:03:28:11 PM, Jungseok Lee wrote: > >> Currently, kernel context and interrupts are handled using a single > >> kernel stack

[PATCH v4 1/2] arm64: Introduce IRQ stack

2015-10-07 Thread Jungseok Lee
Currently, kernel context and interrupts are handled using a single kernel stack navigated by sp_el1. This forces a system to use 16KB stack, not 8KB one. This restriction makes low memory platforms suffer from memory pressure accompanied by performance degradation. This patch addresses the issue

[PATCH v4 1/2] arm64: Introduce IRQ stack

2015-10-07 Thread Jungseok Lee
Currently, kernel context and interrupts are handled using a single kernel stack navigated by sp_el1. This forces a system to use 16KB stack, not 8KB one. This restriction makes low memory platforms suffer from memory pressure accompanied by performance degradation. This patch addresses the issue