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Jemalloc can't handle running on a system with a larger page size than it was configured with, resulting in runtime failures if e.g. a binpkg is used or build-time detection fails (some M1 processors, at least), resulting in failures like: <jemalloc>: Unsupported system page size memory allocation of 72 bytes failed On the other hand, it's quite happy to run when configured with a larger page size (e.g. 64k) on systems with smaller page sizes (16k, 4k). Apply an upstream patch to default to 64k on aarch64; users may override this by passing `--with-lg-pagesize=foo` in `EXTRA_ECONF` if they so desire. This won't resolve issues on other arches, but it's far less common to see this sort of weirdness there anyway. Closes: https://bugs.gentoo.org/964347 Signed-off-by: Matt Jolly <kangie@gentoo.org>
39 lines
1.5 KiB
Diff
39 lines
1.5 KiB
Diff
https://github.com/facebook/jemalloc/commit/7dcdafea00a3a02cfbc84a798a0cc626515011eb
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From: lexprfuncall <5360361+lexprfuncall@users.noreply.github.com>
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Date: Mon, 25 Aug 2025 19:39:30 -0700
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Subject: [PATCH] Change the default page size to 64KiB on Aarch64 Linux
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This updates the configuration script to set the default page size to
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64KiB on Aarch64 Linux. This is motivated by compatibility as a build
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configured for a 64KiB page will work on kernels that use the smaller
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4KiB or 16KiB pages, whereas the reverse is not true.
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To make the configured page size setting more visible, the script now
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displays the page size when printing the configuration results.
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Users that want to override the page size in to choose a smaller value
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can still do so with the --with-lg-pagesize configuration option.
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--- a/configure.ac
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+++ b/configure.ac
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@@ -1990,6 +1990,11 @@ case "${host}" in
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LG_PAGE=14
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fi
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;;
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+ aarch64-unknown-linux-*)
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+ if test "x$LG_PAGE" = "xdetect"; then
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+ LG_PAGE=16
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+ fi
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+ ;;
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esac
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if test "x$LG_PAGE" = "xdetect"; then
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AC_CACHE_CHECK([LG_PAGE],
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@@ -3077,6 +3082,8 @@ AC_MSG_RESULT([INCLUDEDIR : ${INCLUDEDIR}])
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AC_MSG_RESULT([LIBDIR : ${LIBDIR}])
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AC_MSG_RESULT([MANDIR : ${MANDIR}])
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AC_MSG_RESULT([])
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+AC_MSG_RESULT([LG_PAGE : ${LG_PAGE}])
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+AC_MSG_RESULT([])
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AC_MSG_RESULT([srcroot : ${srcroot}])
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AC_MSG_RESULT([abs_srcroot : ${abs_srcroot}])
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AC_MSG_RESULT([objroot : ${objroot}])
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