[Bug libc/6791] New: Add PROT_SAO define to mman.h to support Strong Access Ordering

[Bug libc/6791] New: Add PROT_SAO define to mman.h to support Strong Access Ordering

[eberlein at us dot ibm dot com]

This enhancement request is to add the define for PROT_SAO to powerpc/mman.h to
match the latest changes in the Linux kernel.  This define enables a new
hardware feature on Power7 to be used by applications to specify pages in a
process's address space that exhibit a stronger memory consistency model, Strong
Access Ordering.

The justification for the kernel change is in this changeset:

http://git.kernel.org/gitweb.cgi?p=linux/kernel/git/torvalds/
linux-2.6.git;a=commit;h=ef3d3246a0d06be622867d21af25f997aeeb105f

The change to powerpc/mman.h is
 here:
http://git.kernel.org/gitweb.cgi?p=linux/kernel/git/torvalds/
linux-2.
6.git;a=commitdiff;h=aba46c5027cb59d98052231b36efcbbde9c77a1d;hp=b845f313d78e4e259ec449909e3bbadf77b53a6d

This patch will create the PROT_SAO define in
libc/sysdeps/unix/sysv/linux/powerpc/bits/mman.h to match the linux kernel
header in powerpc/mman.h.

-- 
           Summary: Add PROT_SAO define to mman.h to support Strong Access
                    Ordering
           Product: glibc
           Version: unspecified
            Status: NEW
          Severity: enhancement
          Priority: P2
         Component: libc
        AssignedTo: drepper at redhat dot com
        ReportedBy: eberlein at us dot ibm dot com
                CC: glibc-bugs at sources dot redhat dot com,rsa at us dot
                    ibm dot com


http://sourceware.org/bugzilla/show_bug.cgi?id=6791

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[Bug libc/6791] Add PROT_SAO define to mman.h to support Strong Access Ordering

[eberlein at us dot ibm dot com]

------- Additional Comments From eberlein at us dot ibm dot com  2008-07-30 22:56 -------
Created an attachment (id=2841)
 --> (http://sourceware.org/bugzilla/attachment.cgi?id=2841&action=view)
Patch to add PROT_SAO to mman.h

Attached patch.

-- 


http://sourceware.org/bugzilla/show_bug.cgi?id=6791

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[Bug libc/6791] Add PROT_SAO define to mman.h to support Strong Access Ordering

[eberlein at us dot ibm dot com]

------- Additional Comments From eberlein at us dot ibm dot com  2008-07-31 23:12 -------
link to the message on libc-alpha where this is submitted:

http://sourceware.org/ml/libc-alpha/2008-07/msg00040.html

-- 


http://sourceware.org/bugzilla/show_bug.cgi?id=6791

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[Bug libc/6791] Add PROT_SAO define to mman.h to support Strong Access Ordering

[rsa at us dot ibm dot com]

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
   GCC host triplet|                            |powerpc64-linux
 GCC target triplet|                            |powerpc64-linux
   Target Milestone|---                         |2.9


http://sourceware.org/bugzilla/show_bug.cgi?id=6791

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[Bug libc/6791] Add PROT_SAO define to mman.h to support Strong Access Ordering

[drepper at redhat dot com]

------- Additional Comments From drepper at redhat dot com  2008-08-08 05:14 -------
- there is no reason to not sort the value numerically
- the comments all end with a period
- you didn't update the copyright year

I fixed all this up myself.

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|                            |FIXED


http://sourceware.org/bugzilla/show_bug.cgi?id=6791

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