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Fix pages_purge_forced() to discard pages on non-Linux systems.

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madvise(..., MADV_DONTNEED) only causes demand-zeroing on Linux, so fall
back to overlaying a new mapping.
This commit is contained in:
Jason Evans 2017-03-09 18:20:02 -08:00
parent 21a68e2d22
commit 7cbcd2e2b7
4 changed files with 21 additions and 5 deletions
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2
configure.ac
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@ -547,6 +547,7 @@ case "${host}" in
dnl syscall(2) and secure_getenv(3) are exposed by _GNU_SOURCE.
JE_APPEND_VS(CPPFLAGS, -D_GNU_SOURCE)
abi="elf"
AC_DEFINE([JEMALLOC_PURGE_MADVISE_DONTNEED_ZEROS])
AC_DEFINE([JEMALLOC_HAS_ALLOCA_H])
AC_DEFINE([JEMALLOC_PROC_SYS_VM_OVERCOMMIT_MEMORY], [ ])
AC_DEFINE([JEMALLOC_THREADED_INIT], [ ])
@ -558,6 +559,7 @@ case "${host}" in
dnl syscall(2) and secure_getenv(3) are exposed by _GNU_SOURCE.
JE_APPEND_VS(CPPFLAGS, -D_GNU_SOURCE)
abi="elf"
AC_DEFINE([JEMALLOC_PURGE_MADVISE_DONTNEED_ZEROS])
AC_DEFINE([JEMALLOC_HAS_ALLOCA_H])
AC_DEFINE([JEMALLOC_PROC_SYS_VM_OVERCOMMIT_MEMORY], [ ])
AC_DEFINE([JEMALLOC_THREADED_INIT], [ ])