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Re: [PATCH 1/2] Add framework for tunables
On Sat, Jul 9, 2016 at 11:37 AM, Siddhesh Poyarekar
<siddhesh@sourceware.org> wrote:
> The tunables framework allows us to uniformly manage and expose global
> variables inside glibc as switches to users. tunables/README has
> instructions for glibc developers to add new tunables.
>
> Tunables support can be enabled by passing the --enable-tunables
> configure flag to the configure script. This patch only adds a
> framework and does not pose any limitations on how tunable values are
> read from the user. It also adds environment variables used in malloc
> behaviour tweaking to the tunables framework as a PoC of the
> compatibility interface.
>
> * manual/install.texi: Add --enable-tunables option.
> * INSTALL: Regenerate.
> * Makeconfig (CPPFLAGS): Define TOP_NAMESPACE.
> (before-compile): Generate dl-tunable-list.h early.
> * config.h.in: Add BUILD_TUNABLES.
> * config.make.in: Add build-tunables.
> * configure.ac: Add --enable-tunables option.
> * configure: Regenerate.
> * malloc/arena.c [BUILD_TUNABLES]: Include dl-tunables.h.
> Define TUNABLE_NAMESPACE.
> (DL_TUNABLE_CALLBACK(set_mallopt_check)): New function.
> (ptmalloc_init): Set tunable values.
> * malloc/tst-malloc-usable-static.c: New test case.
> * malloc/Makefile (tests-static): Add it.
> * csu/init-first.c [BUILD_TUNABLES]: Include dl-tunables.h.
> (__libc_init_first) [!SHARED]: Initialize tunables for static
> binaries.
> * scripts/gen-tunables.awk: New file.
> * README.tunables: New file.
> * elf/Versions (ld): Add __tunable_set_val to GLIBC_PRIVATE
> namespace.
> * elf/dl-tunable-list.h: New auto-generated file.
> * elf/dl-tunables.c: New file.
> * elf/dl-tunables.h: New file.
> * elf/dl-tunables.list: New file.
> * elf/dl-tunable-types.h: New file.
> * elf/rtld.c [BUILD_TUNABLES]: Include dl-tunables.h
> (process_envvars): Call __tunables_init.
Did you update siddhesh/tunables branch? It still has the old patches.
H.J.