Re: [PATCH v4 12/12] xen/spinlock: support higher number of cpus

On 29.02.2024 18:04, Jürgen Groß wrote: > On 29.02.24 17:54, Jan Beulich wrote: >> On 29.02.2024 17:45, Juergen Gross wrote: >>> On 29.02.24 17:31, Jan Beulich wrote: On 29.02.2024 17:29, Jürgen Groß wrote: > On 29.02.24 16:46, Jan Beulich wrote: >> On 12.12.2023 10:47, Juergen Gross w

Re: [PATCH v4 12/12] xen/spinlock: support higher number of cpus

On 29.02.24 17:54, Jan Beulich wrote: On 29.02.2024 17:45, Juergen Gross wrote: On 29.02.24 17:31, Jan Beulich wrote: On 29.02.2024 17:29, Jürgen Groß wrote: On 29.02.24 16:46, Jan Beulich wrote: On 12.12.2023 10:47, Juergen Gross wrote: Allow 16 bits per cpu number, which is the limit impos

Re: [PATCH v4 12/12] xen/spinlock: support higher number of cpus

On 29.02.2024 17:45, Juergen Gross wrote: > On 29.02.24 17:31, Jan Beulich wrote: >> On 29.02.2024 17:29, Jürgen Groß wrote: >>> On 29.02.24 16:46, Jan Beulich wrote: On 12.12.2023 10:47, Juergen Gross wrote: > Allow 16 bits per cpu number, which is the limit imposed by > spinlock_tick

Re: [PATCH v4 12/12] xen/spinlock: support higher number of cpus

On 29.02.24 17:31, Jan Beulich wrote: On 29.02.2024 17:29, Jürgen Groß wrote: On 29.02.24 16:46, Jan Beulich wrote: On 12.12.2023 10:47, Juergen Gross wrote: Allow 16 bits per cpu number, which is the limit imposed by spinlock_tickets_t. This will allow up to 65535 cpus, while increasing only

Re: [PATCH v4 12/12] xen/spinlock: support higher number of cpus

On 29.02.2024 17:29, Jürgen Groß wrote: > On 29.02.24 16:46, Jan Beulich wrote: >> On 12.12.2023 10:47, Juergen Gross wrote: >>> Allow 16 bits per cpu number, which is the limit imposed by >>> spinlock_tickets_t. >>> >>> This will allow up to 65535 cpus, while increasing only the size of >>> recurs

Re: [PATCH v4 12/12] xen/spinlock: support higher number of cpus

On 29.02.24 16:46, Jan Beulich wrote: On 12.12.2023 10:47, Juergen Gross wrote: Allow 16 bits per cpu number, which is the limit imposed by spinlock_tickets_t. This will allow up to 65535 cpus, while increasing only the size of recursive spinlocks in debug builds from 8 to 12 bytes. I think w

Re: [PATCH v4 12/12] xen/spinlock: support higher number of cpus

On 12.12.2023 10:47, Juergen Gross wrote: > Allow 16 bits per cpu number, which is the limit imposed by > spinlock_tickets_t. > > This will allow up to 65535 cpus, while increasing only the size of > recursive spinlocks in debug builds from 8 to 12 bytes. I think we want to be more conservative h

Re: [PATCH v4 12/12] xen/spinlock: support higher number of cpus

On 12/12/2023 13:08, Juergen Gross wrote: On 12.12.23 13:39, Julien Grall wrote: Hi, On 12/12/2023 09:47, Juergen Gross wrote: Allow 16 bits per cpu number, which is the limit imposed by spinlock_tickets_t. This will allow up to 65535 cpus, while increasing only the size of recursive spinl

Re: [PATCH v4 12/12] xen/spinlock: support higher number of cpus

On 12.12.23 13:39, Julien Grall wrote: Hi, On 12/12/2023 09:47, Juergen Gross wrote: Allow 16 bits per cpu number, which is the limit imposed by spinlock_tickets_t. This will allow up to 65535 cpus, while increasing only the size of recursive spinlocks in debug builds from 8 to 12 bytes. Sign

Re: [PATCH v4 12/12] xen/spinlock: support higher number of cpus

Hi, On 12/12/2023 09:47, Juergen Gross wrote: Allow 16 bits per cpu number, which is the limit imposed by spinlock_tickets_t. This will allow up to 65535 cpus, while increasing only the size of recursive spinlocks in debug builds from 8 to 12 bytes. Signed-off-by: Juergen Gross --- xen/comm

Re: [PATCH v4 12/12] xen/spinlock: support higher number of cpus

Hi, On 12/12/2023 12:11, Juergen Gross wrote: On 12.12.23 12:40, Julien Grall wrote: Hi Juergen, On 12/12/2023 11:09, Juergen Gross wrote: On 12.12.23 11:10, Julien Grall wrote: Hi Juergen, On 12/12/2023 09:47, Juergen Gross wrote: Allow 16 bits per cpu number, which is the limit imposed b

Re: [PATCH v4 12/12] xen/spinlock: support higher number of cpus

On 12.12.23 12:40, Julien Grall wrote: Hi Juergen, On 12/12/2023 11:09, Juergen Gross wrote: On 12.12.23 11:10, Julien Grall wrote: Hi Juergen, On 12/12/2023 09:47, Juergen Gross wrote: Allow 16 bits per cpu number, which is the limit imposed by spinlock_tickets_t. This will allow up to 655

Re: [PATCH v4 12/12] xen/spinlock: support higher number of cpus

Hi Juergen, On 12/12/2023 11:09, Juergen Gross wrote: On 12.12.23 11:10, Julien Grall wrote: Hi Juergen, On 12/12/2023 09:47, Juergen Gross wrote: Allow 16 bits per cpu number, which is the limit imposed by spinlock_tickets_t. This will allow up to 65535 cpus, while increasing only the size

Re: [PATCH v4 12/12] xen/spinlock: support higher number of cpus

On 12.12.23 11:10, Julien Grall wrote: Hi Juergen, On 12/12/2023 09:47, Juergen Gross wrote: Allow 16 bits per cpu number, which is the limit imposed by spinlock_tickets_t. This will allow up to 65535 cpus, while increasing only the size of recursive spinlocks in debug builds from 8 to 12 byte

Re: [PATCH v4 12/12] xen/spinlock: support higher number of cpus

Hi Juergen, On 12/12/2023 09:47, Juergen Gross wrote: Allow 16 bits per cpu number, which is the limit imposed by spinlock_tickets_t. This will allow up to 65535 cpus, while increasing only the size of recursive spinlocks in debug builds from 8 to 12 bytes. Looking at arch/Kconfig, it looks lik

[PATCH v4 12/12] xen/spinlock: support higher number of cpus

Allow 16 bits per cpu number, which is the limit imposed by spinlock_tickets_t. This will allow up to 65535 cpus, while increasing only the size of recursive spinlocks in debug builds from 8 to 12 bytes. Signed-off-by: Juergen Gross --- xen/common/spinlock.c | 1 + xen/include/xen/spinloc