Re: PR/49816 CVS commit: src/libexec/ld.elf_so

[Joerg Sonnenberger <joerg%britannica.bec.de@localhost>]

The following reply was made to PR lib/49816; it has been noted by GNATS.

From: Joerg Sonnenberger <joerg%britannica.bec.de@localhost>
To: gnats-bugs%NetBSD.org@localhost
Cc: lib-bug-people%netbsd.org@localhost, gnats-admin%netbsd.org@localhost,
	netbsd-bugs%netbsd.org@localhost, yamt%NetBSD.org@localhost
Subject: Re: PR/49816 CVS commit: src/libexec/ld.elf_so
Date: Mon, 6 Apr 2015 18:22:21 +0200

 On Mon, Apr 06, 2015 at 04:10:02PM +0000, YAMAMOTO Takashi wrote:
 >  except that:
 >  * _rtld_exclusive_exit doesn't use CAS
 >  * this code is MI
 >  
 >  i agree that something like PTHREAD__ATOMIC_IS_MEMBAR
 >  would be a nice optimization, though.
 
 So which platform are you worried about that doesn't have TSO and
 doesn't implicit membars for CAS? I'm asking because the only reason
 those changes should help your problem is if they massively penalize the
 operation.
 
 Joerg