On Wed, Jan 29, 2025, at 12:14, Segher Boessenkool wrote:
> On Wed, Jan 29, 2025 at 10:45:10AM +0100, Julian Vetter wrote:
>> Remove the eieio() calls in IO functions for PowerPC. While other
>> architectures permit prefetching, combining, and reordering, the eieio()
>> calls on PowerPC prevent suc
On 29.01.25 12:14, Segher Boessenkool wrote:
On Wed, Jan 29, 2025 at 10:45:10AM +0100, Julian Vetter wrote:
Remove the eieio() calls in IO functions for PowerPC. While other
architectures permit prefetching, combining, and reordering, the eieio()
calls on PowerPC prevent such optimizations.
Ye
On Wed, Jan 29, 2025 at 10:45:10AM +0100, Julian Vetter wrote:
> Remove the eieio() calls in IO functions for PowerPC. While other
> architectures permit prefetching, combining, and reordering, the eieio()
> calls on PowerPC prevent such optimizations.
Yes, and it is crucial to prevent combining,
Remove the eieio() calls in IO functions for PowerPC. While other
architectures permit prefetching, combining, and reordering, the eieio()
calls on PowerPC prevent such optimizations. This has only historical
reasons, because in the early arch/powerpc64 code also readl() had these
eieio() calls, bu
