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glibc/malloc
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Patrick McGehearty 0a4df6f534 Remove upper limit on tunable MALLOC_MMAP_THRESHOLD 
The current limit on MALLOC_MMAP_THRESHOLD is either 1 Mbyte (for
32-bit apps) or 32 Mbytes (for 64-bit apps).  This value was set by a
patch dated 2006 (15 years ago).  Attempts to set the threshold higher
are currently ignored.

The default behavior is appropriate for many highly parallel
applications where many processes or threads are sharing RAM. In other
situations where the number of active processes or threads closely
matches the number of cores, a much higher limit may be desired by the
application designer. By today's standards on personal computers and
small servers, 2 Gbytes of RAM per core is commonly available. On
larger systems 4 Gbytes or more of RAM is sometimes available.
Instead of raising the limit to match current needs, this patch
proposes to remove the limit of the tunable, leaving the decision up
to the user of a tunable to judge the best value for their needs.

This patch does not change any of the defaults for malloc tunables,
retaining the current behavior of the dynamic malloc mmap threshold.

bugzilla 27801 - Remove upper limit on tunable MALLOC_MMAP_THRESHOLD
Reviewed-by: DJ Delorie <dj@redhat.com>

malloc/
        malloc.c changed do_set_mmap_threshold to remove test
        for HEAP_MAX_SIZE.
2021-12-16 17:24:37 +00:00
..
alloc_buffer_alloc_array.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
alloc_buffer_allocate.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
alloc_buffer_copy_bytes.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
alloc_buffer_copy_string.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
alloc_buffer_create_failure.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
arena.c malloc: Enable huge page support on main arena 2021-12-15 17:35:39 -03:00
Depend added rt to malloc/Depend [BZ #27132] 2021-02-23 10:04:45 +01:00
dynarray_at_failure.c malloc: Sync dynarray with gnulib 2021-02-09 16:57:54 -03:00
dynarray_emplace_enlarge.c malloc: Sync dynarray with gnulib 2021-02-09 16:57:54 -03:00
dynarray_finalize.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
dynarray_resize_clear.c malloc: Sync dynarray with gnulib 2021-02-09 16:57:54 -03:00
dynarray_resize.c malloc: Sync dynarray with gnulib 2021-02-09 16:57:54 -03:00
dynarray-skeleton.c malloc: Sync dynarray with gnulib 2021-02-09 16:57:54 -03:00
dynarray.h malloc: Sync dynarray with gnulib 2021-02-09 16:57:54 -03:00
hooks.c Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
Makefile malloc: Add Huge Page support to arenas 2021-12-15 17:35:39 -03:00
malloc-check.c Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
malloc-debug.c malloc: Fix malloc debug for 2.35 onwards 2021-11-17 21:33:39 +09:00
malloc-internal.h malloc: Add madvise support for Transparent Huge Pages 2021-12-15 17:35:14 -03:00
malloc.c Remove upper limit on tunable MALLOC_MMAP_THRESHOLD 2021-12-16 17:24:37 +00:00
malloc.h Add alloc_align attribute to memalign et al 2021-10-21 00:19:20 +01:00
mallocbug.c Reformat malloc to gnu style. 2014-01-02 09:40:10 +01:00
mcheck-impl.c Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
mcheck-init.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
mcheck.c Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
mcheck.h Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
memusage.c Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
memusage.sh Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
memusagestat.c Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
morecore.c malloc: Enable huge page support on main arena 2021-12-15 17:35:39 -03:00
mtrace-impl.c Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
mtrace.c Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
mtrace.pl Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
obstack.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
obstack.h Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
reallocarray.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
scratch_buffer_dupfree.c malloc: Add scratch_buffer_dupfree 2021-01-05 11:33:16 -03:00
scratch_buffer_grow_preserve.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
scratch_buffer_grow.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
scratch_buffer_set_array_size.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
set-freeres.c elf: Introduce GLRO (dl_libc_freeres), called from __libc_freeres 2021-11-17 12:20:29 +01:00
thread-freeres.c dlfcn: dlerror needs to call free from the base namespace [BZ #24773] 2021-04-21 19:49:51 +02:00
tst-alloc_buffer.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
tst-calloc.c Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
tst-compathooks-off.c Move malloc hooks into a compat DSO 2021-07-22 18:37:59 +05:30
tst-compathooks-on.c Move malloc hooks into a compat DSO 2021-07-22 18:37:59 +05:30
tst-dynarray-at-fail.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
tst-dynarray-fail.c malloc: Sync dynarray with gnulib 2021-02-09 16:57:54 -03:00
tst-dynarray-shared.h malloc: Sync dynarray with gnulib 2021-02-09 16:57:54 -03:00
tst-dynarray.c Disable -Waggressive-loop-optimizations warnings in tst-dynarray.c 2021-10-29 14:40:45 +00:00
tst-free-errno.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
tst-interpose-aux-nothread.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
tst-interpose-aux-thread.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
tst-interpose-aux.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
tst-interpose-aux.h Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
tst-interpose-nothread.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
tst-interpose-skeleton.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
tst-interpose-static-nothread.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
tst-interpose-static-thread.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
tst-interpose-thread.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
tst-mallinfo2.c tst-mallinfo2.c: Use correct multiple for total variable 2021-05-25 16:47:01 -04:00
tst-malloc_info.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
tst-malloc-backtrace.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
tst-malloc-check.c Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
tst-malloc-fork-deadlock.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
tst-malloc-stats-cancellation.c malloc: Run tst-malloc-stats-cancellation via test-driver.c 2021-04-07 02:35:50 +02:00
tst-malloc-tcache-leak.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
tst-malloc-thread-exit.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
tst-malloc-thread-fail.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
tst-malloc-too-large.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
tst-malloc-usable-tunables.c Initialize tunable list with the GLIBC_TUNABLES environment variable 2016-12-31 23:49:24 +05:30
tst-malloc-usable.c Handle NULL input to malloc_usable_size [BZ #28506] 2021-10-29 14:53:55 +05:30
tst-malloc.c Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
tst-mallocalign1.c Add a generic malloc test for MALLOC_ALIGNMENT 2021-07-09 06:39:30 -07:00
tst-mallocfork2.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
tst-mallocfork3.c posix: Add _Fork [BZ #4737] 2021-06-28 15:55:56 -03:00
tst-mallocfork.c Fix malloc tests build with GCC 10. 2019-06-10 22:12:08 +00:00
tst-mallocstate.c Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
tst-mallopt.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
tst-memalign.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
tst-mtrace.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
tst-mtrace.sh Move malloc hooks into a compat DSO 2021-07-22 18:37:59 +05:30
tst-mxfast.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
tst-obstack.c Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
tst-posix_memalign.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
tst-pvalloc-fortify.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
tst-pvalloc.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
tst-realloc.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
tst-reallocarray.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
tst-safe-linking.c tst-safe-linking: make false positives even more improbable 2021-07-19 08:29:25 +05:30
tst-scratch_buffer.c malloc: Add scratch_buffer_dupfree 2021-01-05 11:33:16 -03:00
tst-tcfree1.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
tst-tcfree2.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
tst-tcfree3.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
tst-trim1.c
tst-valloc.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
Versions Move malloc_{g,s}et_state to libc_malloc_debug 2021-07-22 18:38:10 +05:30