Update mimalloc to v2.2.7 #6048
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In preparation for upgrading to a newer mimalloc version. Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
In preparation for upgrading to a newer mimalloc version. Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Update to newer mimalloc versions like this:
update_mimalloc ()
{
test $# = 1 || {
echo "Need a mimalloc version" 1>&2;
return 1
};
for oneline in 'mimalloc: adjust for building inside Git' 'Import the source code of mimalloc';
do
git revert -n HEAD^{/^"$oneline"} && git checkout HEAD -- Makefile && git commit -sm "Temporarily revert \"$oneline\"" -m 'In preparation for upgrading to a newer mimalloc version.' || return 1;
done;
for file in $(git show --format='%n' --name-only --diff-filter=A HEAD^{/^"Import the source code of mimalloc "}) compat/mimalloc/arena-abandon.c compat/mimalloc/free.c compat/mimalloc/libc.c compat/mimalloc/prim/prim.c compat/mimalloc/mimalloc-stats.h;
do
file2=${file#compat/mimalloc/};
case "$file2" in
segment-cache.c)
: no longer needed;
continue
;;
bitmap.h | *.c)
file2=src/$file2
;;
*.h)
file2=include/$file2
;;
esac;
mkdir -p "${file%/*}" && git -C /usr/src/mimalloc/ show "$1":$file2 > "$file" && git add "$file" || {
echo "Failed: $file2 -> $file" 1>&2;
return 1
};
done;
conv_sed='sed -n "/^ *eval/d;/ /p"' && git commit -sm "Import the source code of mimalloc $1" -m "Update to newer mimalloc versions like this:" -m "$(set | sed -n '/^update_mimalloc *() *$/,/^}/{s/^./ &/;p}')" -m ' update_mimalloc $MIMALLOC_VERSION' -m 'For convenience, you can set `MIMALLOC_VERSION` and then run:' -m ' eval "$(git show -s <this-commit> | '"$conv_sed"')"' || return 1;
git cherry-pick HEAD^{/^'mimalloc: adjust for building inside Git'} || return 1
}
update_mimalloc $MIMALLOC_VERSION
For convenience, you can set `MIMALLOC_VERSION` and then run:
eval "$(git show -s <this-commit> | sed -n "/^ *eval/d;/ /p")"
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
We want to compile mimalloc's source code as part of Git, rather than requiring the code to be built as an external library: mimalloc uses a CMake-based build, which is not necessarily easy to integrate into the flavors of Git for Windows (which will be the main benefitting port). Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de> Signed-off-by: Matthias Aßhauer <mha1993@live.de>
mjcheetham
approved these changes
Jan 16, 2026
derrickstolee
approved these changes
Jan 16, 2026
carlosmoraisdasilvacarlos-art
referenced
this pull request
Jan 17, 2026
Rather than using private IFTTT Applets that send mails to this maintainer whenever a new version of a Git for Windows component was released, let's use the power of GitHub workflows to make this process publicly visible. This workflow monitors the Atom/RSS feeds, and opens a ticket whenever a new version was released. Note: Bash sometimes releases multiple patched versions within a few minutes of each other (i.e. 5.1p1 through 5.1p4, 5.0p15 and 5.0p16). The MSYS2 runtime also has a similar system. We can address those patches as a group, so we shouldn't get multiple issues about them. Note further: We're not acting on newlib releases, OpenSSL alphas, Perl release candidates or non-stable Perl releases. There's no need to open issues about them. Co-authored-by: Matthias Aßhauer <mha1993@live.de> Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
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After releasing v2.2.6, they followed up really quickly with a v2.2.7, which indicates some urgency in taking this update. The diff of this PR is pretty informative, too.
This closes #6046