Re: [PATCH bpf-next 0/5] bpf, x86: enable EXECMEM_ROX_CACHE for BPF allocations

[Mike Rapoport <rppt@kernel.org>]

Hi Daniel,

On Thu, Jul 09, 2026 at 02:12:04PM +0200, Daniel Borkmann wrote:
> Hi Mike,
> 
> On 7/9/26 10:03 AM, Mike Rapoport wrote:
> > Gentle ping
> > 
> > On Fri, Jun 26, 2026 at 09:42:27PM +0300, Mike Rapoport (Microsoft) wrote:
> > > Hi,
> > > 
> > > BPF allocations of executable memory on x86 are essentially read-only. Most
> > > paths that call bpf_jit_alloc_exec() immediately make it ROX with
> > > set_memory_rox().
> > > 
> > > The code generation, at least on x86, uses separately allocated writable
> > > buffers and then updates the actual text memory with text_poke().
> > > 
> > > These patches do several small adjustments to how BPF allocates executable
> > > memory and enable EXECMEM_ROX_CACHE for BPF allocations on x86.
>
> I think there was an open Q from Alexei wrt the sashiko reports [0] and
> whether you could address them. Once done, please resend to bpf list.

Thanks for the link!
I'm not subscribed to bpf@ and it took me a few minutes to realize why I
don't see this in my inbox.
 
> Thanks,
> Daniel
> 
>   [0] https://lore.kernel.org/bpf/20260626-execmem-x86-rox-bpf-v0-v1-0-45a0b0ed4fe9@kernel.org/#r

-- 
Sincerely yours,
Mike.