Re: [PATCH] powerpc/mm: Limit allocation of SWIOTLB on server machines

Konrad Rzeszutek Wilk writes: > On Fri, Jan 08, 2021 at 09:27:01PM -0300, Thiago Jung Bauermann wrote: >> >> Ram Pai writes: >> >> > On Wed, Dec 23, 2020 at 09:06:01PM -0300, Thiago Jung Bauermann wrote: >> >> >> >> Hi Ram, >> >> >> >> Thanks for reviewing this patch. >> >> >> >> Ram Pai

Re: [PATCH] powerpc/mm: Limit allocation of SWIOTLB on server machines

On Fri, Jan 08, 2021 at 09:27:01PM -0300, Thiago Jung Bauermann wrote: > > Ram Pai writes: > > > On Wed, Dec 23, 2020 at 09:06:01PM -0300, Thiago Jung Bauermann wrote: > >> > >> Hi Ram, > >> > >> Thanks for reviewing this patch. > >> > >> Ram Pai writes: > >> > >> > On Fri, Dec 18, 2020 at

Re: [PATCH] powerpc/mm: Limit allocation of SWIOTLB on server machines

Ram Pai writes: > On Wed, Dec 23, 2020 at 09:06:01PM -0300, Thiago Jung Bauermann wrote: >> >> Hi Ram, >> >> Thanks for reviewing this patch. >> >> Ram Pai writes: >> >> > On Fri, Dec 18, 2020 at 03:21:03AM -0300, Thiago Jung Bauermann wrote: >> >> On server-class POWER machines, we don't

Re: [PATCH] powerpc/mm: Limit allocation of SWIOTLB on server machines

On Wed, Dec 23, 2020 at 09:06:01PM -0300, Thiago Jung Bauermann wrote: > > Hi Ram, > > Thanks for reviewing this patch. > > Ram Pai writes: > > > On Fri, Dec 18, 2020 at 03:21:03AM -0300, Thiago Jung Bauermann wrote: > >> On server-class POWER machines, we don't need the SWIOTLB unless we're

Re: [PATCH] powerpc/mm: Limit allocation of SWIOTLB on server machines

Hi Ram, Thanks for reviewing this patch. Ram Pai writes: > On Fri, Dec 18, 2020 at 03:21:03AM -0300, Thiago Jung Bauermann wrote: >> On server-class POWER machines, we don't need the SWIOTLB unless we're a >> secure VM. Nevertheless, if CONFIG_SWIOTLB is enabled we unconditionally >>

Re: [PATCH] powerpc/mm: Limit allocation of SWIOTLB on server machines

On Fri, Dec 18, 2020 at 03:21:03AM -0300, Thiago Jung Bauermann wrote: > On server-class POWER machines, we don't need the SWIOTLB unless we're a > secure VM. Nevertheless, if CONFIG_SWIOTLB is enabled we unconditionally > allocate it. > > In most cases this is harmless, but on a few machine

[PATCH] powerpc/mm: Limit allocation of SWIOTLB on server machines

On server-class POWER machines, we don't need the SWIOTLB unless we're a secure VM. Nevertheless, if CONFIG_SWIOTLB is enabled we unconditionally allocate it. In most cases this is harmless, but on a few machine configurations (e.g., POWER9 powernv systems with 4 GB area reserved for crashdump