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Re: [PATCH] Use IE model for static variables in glibc


On 07/10/2015 08:37 PM, Ramana Radhakrishnan wrote:
> On Fri, Jul 10, 2015 at 6:18 AM, Siddhesh Poyarekar <siddhesh@redhat.com> wrote:
>> On Thu, Jul 09, 2015 at 01:40:33PM -0700, Roland McGrath wrote:
> 
> <snip>
>>
>> I also have to look at the impact on ARM since it uses
>> -ftls-model=gnu2 to get tls descriptors.  I reckon it would actually
>> be an improvement, but I'd like to make sure that it is.  There's also
>> a good case IMO to somehow compute static TLS usage within libc.so and
>> libpthread.so and add that to the surplus.  That way the surplus would
>> be reserved specifically for user DSOs that absolutely want to use IE
>> and libc will never encroach that.  Again a good project for 2.23.
> 
> FYI, while -ftls-model=gnu2 isn't default on AArch32 - on AArch64 tls
> descriptors are the default, so you could test it there if you had
> access to such hardware.

We absolutely have access to aarch64 hardware. So we'll test there.

c.


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