Re: question about the limited interrupt vector resource on a single cpu

2018-06-06 Thread Thomas Gleixner
On Wed, 6 Jun 2018, Pingfan Liu wrote: > On Wed, Jun 6, 2018 at 5:34 PM, Thomas Gleixner wrote: > > On Wed, 6 Jun 2018, Pingfan Liu wrote: > > > >> On Wed, Jun 6, 2018 at 5:15 PM, Thomas Gleixner wrote: > >> > On Wed, 6 Jun 2018, Pingfan Liu wrote: > >> > > >> >> For x86, there is around 200 vect

Re: question about the limited interrupt vector resource on a single cpu

2018-06-06 Thread Pingfan Liu
On Wed, Jun 6, 2018 at 5:34 PM, Thomas Gleixner wrote: > On Wed, 6 Jun 2018, Pingfan Liu wrote: > >> On Wed, Jun 6, 2018 at 5:15 PM, Thomas Gleixner wrote: >> > On Wed, 6 Jun 2018, Pingfan Liu wrote: >> > >> >> For x86, there is around 200 vectors left for external device on a >> >> single logic

Re: question about the limited interrupt vector resource on a single cpu

2018-06-06 Thread Thomas Gleixner
On Wed, 6 Jun 2018, Pingfan Liu wrote: > On Wed, Jun 6, 2018 at 5:15 PM, Thomas Gleixner wrote: > > On Wed, 6 Jun 2018, Pingfan Liu wrote: > > > >> For x86, there is around 200 vectors left for external device on a > >> single logic cpu. > >> > >> Is there any case that we exhaust them in real wo

Re: question about the limited interrupt vector resource on a single cpu

2018-06-06 Thread Pingfan Liu
On Wed, Jun 6, 2018 at 5:15 PM, Thomas Gleixner wrote: > On Wed, 6 Jun 2018, Pingfan Liu wrote: > >> For x86, there is around 200 vectors left for external device on a >> single logic cpu. >> >> Is there any case that we exhaust them in real world, and is it worth to fix? > > Exhaustion is unlikel

Re: question about the limited interrupt vector resource on a single cpu

2018-06-06 Thread Thomas Gleixner
On Wed, 6 Jun 2018, Pingfan Liu wrote: > For x86, there is around 200 vectors left for external device on a > single logic cpu. > > Is there any case that we exhaust them in real world, and is it worth to fix? Exhaustion is unlikely, but how would you fix it? The vector space per CPU is limited b

question about the limited interrupt vector resource on a single cpu

2018-06-06 Thread Pingfan Liu
For x86, there is around 200 vectors left for external device on a single logic cpu. Is there any case that we exhaust them in real world, and is it worth to fix? Thanks, Pingfan