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Define MADV_FREE on our own when needed.

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On x86 Linux, we define our own MADV_FREE if madvise(2) is available, but no
MADV_FREE is detected.  This allows the feature to be built in and enabled with
runtime detection.
This commit is contained in:
Qi Wang 2017-10-05 16:28:55 -07:00 • committed by Qi Wang
parent fc83de0384
commit 31ab38be5f
4 changed files with 23 additions and 1 deletions
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3
include/jemalloc/internal/jemalloc_internal_defs.h.in
View file

@ -285,6 +285,9 @@
#undef JEMALLOC_PURGE_MADVISE_DONTNEED
#undef JEMALLOC_PURGE_MADVISE_DONTNEED_ZEROS
/* Defined if madvise(2) is available but MADV_FREE is not (x86 Linux only). */
#undef JEMALLOC_DEFINE_MADVISE_FREE
/*
* Defined if transparent huge pages (THPs) are supported via the
* MADV_[NO]HUGEPAGE arguments to madvise(2), and THP support is enabled.

4
include/jemalloc/internal/jemalloc_preamble.h.in
View file

@ -47,6 +47,10 @@
#endif
#include "jemalloc/internal/hooks.h"
#ifdef JEMALLOC_DEFINE_MADVISE_FREE
# define JEMALLOC_MADV_FREE 8
#endif
static const bool config_debug =
#ifdef JEMALLOC_DEBUG
true