Release 1.6.1 - 2026-07-25 · fmschulz/memd

Release Notes

Background consolidation leaked its locks to the consolidator backend. The
detached child holds the scope and slot locks through descriptors whose
FD_CLOEXEC the parent deliberately cleared, then execs a consolidator CLI.
Rust's Command does not close descriptors, so that backend inherited both
flocks and kept them after the child exited. With four slots, orphaned
backends could hold every one of them until they died or the machine
rebooted, which is the starvation the slot ceiling was added to prevent.

The child now marks every inherited descriptor close-on-exec before selecting
a backend. Marking is not closing: the locks stay held for the child's
lifetime and simply stop surviving an exec.
Background consolidation failed outright on Linux 5.9 and 5.10.
CLOSE_RANGE_CLOEXEC arrived in 5.11, so on those kernels close_range
exists but rejects the flag with EINVAL, and only ENOSYS was treated as
tolerable. Both are now tolerated, and the sealing path falls back to walking
/proc/self/fd when the flag is unavailable.

curl --proto '=https' --tlsv1.2 -LsSf https://github.com/fmschulz/memd/releases/download/v1.6.1/memd-installer.sh | sh

File	Platform	Checksum
memd-aarch64-apple-darwin.tar.xz	Apple Silicon macOS	checksum
memd-x86_64-apple-darwin.tar.xz	Intel macOS	checksum
memd-aarch64-unknown-linux-musl.tar.xz	ARM64 MUSL Linux	checksum
memd-x86_64-unknown-linux-musl.tar.xz	x64 MUSL Linux	checksum