Hi Mike,
On Wed, Oct 09, 2024 at 09:08:14PM +0300, Mike Rapoport wrote:
> From: "Mike Rapoport (Microsoft)"
>
> When module text memory will be allocated with ROX permissions, the
> memory at the actual address where the module will live will contain
> invalid instructions and there will be a wr
Op 09-10-2024 om 20:08 schreef Mike Rapoport:
From: "Mike Rapoport (Microsoft)"
Using large pages to map text areas reduces iTLB pressure and improves
performance.
Extend execmem_alloc() with an ability to use huge pages with ROX
permissions as a cache for smaller allocations.
To populate the
On Wed, Oct 9, 2024 at 10:47 PM Mike Rapoport wrote:
>
> On Wed, Oct 09, 2024 at 03:23:40PM -0700, Song Liu wrote:
> > On Wed, Oct 9, 2024 at 11:10 AM Mike Rapoport wrote:
> > [...]
> > > diff --git a/include/linux/module.h b/include/linux/module.h
> > > index 88ecc5e9f523..7039f609c6ef 100644
>
On Thu, Oct 10, 2024 at 05:30:33PM +0900, Sergey Senozhatsky wrote:
> On (24/10/09 21:08), Mike Rapoport wrote:
> > From: "Mike Rapoport (Microsoft)"
> >
> > Enable execmem's cache of PMD_SIZE'ed pages mapped as ROX for module
> > text allocations.
> >
>
> With this modprobe disappoints kmemlea
On Wed, Oct 09, 2024 at 11:58:33PM -0700, Christoph Hellwig wrote:
> On Wed, Oct 09, 2024 at 09:08:15PM +0300, Mike Rapoport wrote:
> > /**
> > * struct execmem_info - architecture parameters for code allocations
> > + * @fill_trapping_insns: set memory to contain instructions that will trap
> >
On Wed, Oct 09, 2024 at 01:24:27PM -0700, Andrew Morton wrote:
> On Wed, 9 Oct 2024 21:08:15 +0300 Mike Rapoport wrote:
>
> > Using large pages to map text areas reduces iTLB pressure and improves
> > performance.
>
> Are there any measurable performance improvements?
I don't have any numbers,
> +extern void apply_alternatives(struct alt_instr *start, struct alt_instr
> *end,
> +struct module *mod);
> +extern void apply_retpolines(s32 *start, s32 *end, struct module *mod);
> +extern void apply_returns(s32 *start, s32 *end, struct module *mod);
> +extern void
On Thu, Oct 10, 2024 at 09:03:42AM +0200, Christoph Hellwig wrote:
> > I think we should try to have a little fewer nested macros
> > to evaluate here, right now this ends up expanding
> > __pfn_to_phys, PFN_PHYS, PAGE_SHIFT, CONFIG_PAGE_SHIFT,
> > page_to_pfn and __page_to_pfn. While the behavior
Looks good:
Reviewed-by: Christoph Hellwig
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On Wed, Oct 09, 2024 at 02:06:27PM +, Arnd Bergmann wrote:
> This is clearly a good idea, and I'm happy to take that through
> the asm-generic tree if there are no complaints.
>
> Do you have any other patches that depend on it?
Well, I have new code that would benefit from these helpers, but
On (24/10/09 21:08), Mike Rapoport wrote:
> From: "Mike Rapoport (Microsoft)"
>
> Enable execmem's cache of PMD_SIZE'ed pages mapped as ROX for module
> text allocations.
>
With this modprobe disappoints kmemleak
[ 12.700128] kmemleak: Found object by alias at 0xa000a000
[ 12.70217
On Wed, Oct 9, 2024, at 18:08, Mike Rapoport wrote:
> From: "Mike Rapoport (Microsoft)"
>
> Several architectures support text patching, but they name the header
> files that declare patching functions differently.
>
> Make all such headers consistently named text-patching.h and add an empty
> hea
On Wed, Oct 9, 2024 at 8:09 PM Mike Rapoport wrote:
> From: "Mike Rapoport (Microsoft)"
>
> Several architectures support text patching, but they name the header
> files that declare patching functions differently.
>
> Make all such headers consistently named text-patching.h and add an empty
> he
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