linux-kernel - Re: [PATCH v13 14/14] powerpc/64s/radix: Enable huge vmalloc mappings

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Message-ID: <20210416090442.3852817d@canb.auug.org.au>
Date:   Fri, 16 Apr 2021 09:04:42 +1000
From:   Stephen Rothwell <sfr@...b.auug.org.au>
To:     Andrew Morton <akpm@...ux-foundation.org>
Cc:     Christophe Leroy <christophe.leroy@...roup.eu>,
        Nicholas Piggin <npiggin@...il.com>, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org, linux-arch@...r.kernel.org,
        Jonathan Cameron <Jonathan.Cameron@...wei.com>,
        Christoph Hellwig <hch@...radead.org>,
        Rick Edgecombe <rick.p.edgecombe@...el.com>,
        Ding Tianhong <dingtianhong@...wei.com>,
        linuxppc-dev@...ts.ozlabs.org,
        Michael Ellerman <mpe@...erman.id.au>
Subject: Re: [PATCH v13 14/14] powerpc/64s/radix: Enable huge vmalloc
 mappings

Hi all,

On Thu, 15 Apr 2021 11:55:29 -0700 Andrew Morton <akpm@...ux-foundation.org> wrote:
>
> On Thu, 15 Apr 2021 12:23:55 +0200 Christophe Leroy <christophe.leroy@...roup.eu> wrote:
> > > +	 * is done. STRICT_MODULE_RWX may require extra work to support this
> > > +	 * too.
> > > +	 */
> > >   
> > > -	return __vmalloc_node_range(size, 1, MODULES_VADDR, MODULES_END, GFP_KERNEL,
> > > -				    PAGE_KERNEL_EXEC, VM_FLUSH_RESET_PERMS, NUMA_NO_NODE,  
> > 
> > 
> > I think you should add the following in <asm/pgtable.h>
> > 
> > #ifndef MODULES_VADDR
> > #define MODULES_VADDR VMALLOC_START
> > #define MODULES_END VMALLOC_END
> > #endif
> > 
> > And leave module_alloc() as is (just removing the enclosing #ifdef MODULES_VADDR and adding the 
> > VM_NO_HUGE_VMAP  flag)
> > 
> > This would minimise the conflits with the changes I did in powerpc/next reported by Stephen R.
> >   
> 
> I'll drop powerpc-64s-radix-enable-huge-vmalloc-mappings.patch for now,
> make life simpler.

I have dropped that patch from linux-next.
-- 
Cheers,
Stephen Rothwell

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