Re: [PATCH v6 8/8] xen: allow up to 16383 cpus

2024-05-07 Thread Stefano Stabellini
On Tue, 7 May 2024, Julien Grall wrote: > Hi Stefano, > > On 03/05/2024 20:07, Stefano Stabellini wrote: > > On Fri, 3 May 2024, Julien Grall wrote: > > [...] > > > > So are you saying that from Xen point of view, you are expecting no > > > difference > > > between 256 and 512. And therefore you

Re: [PATCH v6 8/8] xen: allow up to 16383 cpus

2024-05-07 Thread Julien Grall
Hi Jan, On 06/05/2024 07:42, Jan Beulich wrote: Of course those calculations depend on what people choose as actual values, but giving an upper bound being a power of 2 may at least serve as a hint to them. This is rather a weak hint. If you want to encourage users to chose a power-of-2 value

Re: [PATCH v6 8/8] xen: allow up to 16383 cpus

2024-05-07 Thread Julien Grall
Hi Stefano, On 03/05/2024 20:07, Stefano Stabellini wrote: On Fri, 3 May 2024, Julien Grall wrote: [...] So are you saying that from Xen point of view, you are expecting no difference between 256 and 512. And therefore you would be happy if to backport patches if someone find differences (or

Re: [PATCH v6 8/8] xen: allow up to 16383 cpus

2024-05-05 Thread Juergen Gross
On 06.05.24 08:42, Jan Beulich wrote: On 03.05.2024 21:07, Stefano Stabellini wrote: On Fri, 3 May 2024, Julien Grall wrote: Hi Stefano, On 02/05/2024 19:13, Stefano Stabellini wrote: On Mon, 29 Apr 2024, Julien Grall wrote: Hi Juergen, On 29/04/2024 12:28, Jürgen Groß wrote: On 29.04.24 1

Re: [PATCH v6 8/8] xen: allow up to 16383 cpus

2024-05-05 Thread Jan Beulich
On 03.05.2024 21:07, Stefano Stabellini wrote: > On Fri, 3 May 2024, Julien Grall wrote: >> Hi Stefano, >> >> On 02/05/2024 19:13, Stefano Stabellini wrote: >>> On Mon, 29 Apr 2024, Julien Grall wrote: Hi Juergen, On 29/04/2024 12:28, Jürgen Groß wrote: > On 29.04.24 13:04, Julie

Re: [PATCH v6 8/8] xen: allow up to 16383 cpus

2024-05-03 Thread Stefano Stabellini
On Fri, 3 May 2024, Julien Grall wrote: > Hi Stefano, > > On 02/05/2024 19:13, Stefano Stabellini wrote: > > On Mon, 29 Apr 2024, Julien Grall wrote: > > > Hi Juergen, > > > > > > On 29/04/2024 12:28, Jürgen Groß wrote: > > > > On 29.04.24 13:04, Julien Grall wrote: > > > > > Hi Juergen, > > > >

Re: [PATCH v6 8/8] xen: allow up to 16383 cpus

2024-05-03 Thread Julien Grall
Hi Stefano, On 02/05/2024 19:13, Stefano Stabellini wrote: On Mon, 29 Apr 2024, Julien Grall wrote: Hi Juergen, On 29/04/2024 12:28, Jürgen Groß wrote: On 29.04.24 13:04, Julien Grall wrote: Hi Juergen, Sorry for the late reply. On 29/04/2024 11:33, Juergen Gross wrote: On 08.04.24 09:10,

Re: [PATCH v6 8/8] xen: allow up to 16383 cpus

2024-05-02 Thread Stefano Stabellini
On Mon, 29 Apr 2024, Julien Grall wrote: > Hi Juergen, > > On 29/04/2024 12:28, Jürgen Groß wrote: > > On 29.04.24 13:04, Julien Grall wrote: > > > Hi Juergen, > > > > > > Sorry for the late reply. > > > > > > On 29/04/2024 11:33, Juergen Gross wrote: > > > > On 08.04.24 09:10, Jan Beulich wrote

Re: [PATCH v6 8/8] xen: allow up to 16383 cpus

2024-04-29 Thread Julien Grall
Hi Juergen, On 29/04/2024 12:28, Jürgen Groß wrote: On 29.04.24 13:04, Julien Grall wrote: Hi Juergen, Sorry for the late reply. On 29/04/2024 11:33, Juergen Gross wrote: On 08.04.24 09:10, Jan Beulich wrote: On 27.03.2024 16:22, Juergen Gross wrote: With lock handling now allowing up to 1

Re: [PATCH v6 8/8] xen: allow up to 16383 cpus

2024-04-29 Thread Jürgen Groß
On 29.04.24 13:04, Julien Grall wrote: Hi Juergen, Sorry for the late reply. On 29/04/2024 11:33, Juergen Gross wrote: On 08.04.24 09:10, Jan Beulich wrote: On 27.03.2024 16:22, Juergen Gross wrote: With lock handling now allowing up to 16384 cpus (spinlocks can handle 65535 cpus, rwlocks ca

Re: [PATCH v6 8/8] xen: allow up to 16383 cpus

2024-04-29 Thread Julien Grall
Hi Juergen, Sorry for the late reply. On 29/04/2024 11:33, Juergen Gross wrote: On 08.04.24 09:10, Jan Beulich wrote: On 27.03.2024 16:22, Juergen Gross wrote: With lock handling now allowing up to 16384 cpus (spinlocks can handle 65535 cpus, rwlocks can handle 16384 cpus), raise the allowed

Re: [PATCH v6 8/8] xen: allow up to 16383 cpus

2024-04-29 Thread Juergen Gross
On 08.04.24 09:10, Jan Beulich wrote: On 27.03.2024 16:22, Juergen Gross wrote: With lock handling now allowing up to 16384 cpus (spinlocks can handle 65535 cpus, rwlocks can handle 16384 cpus), raise the allowed limit for the number of cpus to be configured to 16383. The new limit is imposed b

Re: [PATCH v6 8/8] xen: allow up to 16383 cpus

2024-04-08 Thread Jan Beulich
On 27.03.2024 16:22, Juergen Gross wrote: > With lock handling now allowing up to 16384 cpus (spinlocks can handle > 65535 cpus, rwlocks can handle 16384 cpus), raise the allowed limit for > the number of cpus to be configured to 16383. > > The new limit is imposed by IOMMU_CMD_BUFFER_MAX_ENTRIES

[PATCH v6 8/8] xen: allow up to 16383 cpus

2024-03-27 Thread Juergen Gross
With lock handling now allowing up to 16384 cpus (spinlocks can handle 65535 cpus, rwlocks can handle 16384 cpus), raise the allowed limit for the number of cpus to be configured to 16383. The new limit is imposed by IOMMU_CMD_BUFFER_MAX_ENTRIES and QINVAL_MAX_ENTRY_NR required to be larger than 2