# Btrfs gains Zstd and reflink performance boosts in Linux 7.4

> **Key takeaway:** Linux 7.4 brings several Btrfs performance improvements including faster Zstd decompression, reduced inode extent map lock contention, and optimized reflink operations.

**Published:** 2026-10-19T18:17:17+00:00 
**Source:** Phoronix Benchmarks & Drivers 
**Category:** kernel-os 
**Canonical URL:** https://fosswire.org/news/btrfs-gains-zstd-and-reflink-performance-boosts-in-linux-74.html 

## Summary
The in-development Linux 7.4 kernel includes multiple Btrfs optimizations. Zstd decompression sees roughly +8MB/s speed-ups for transparently compressed filesystems. Lock contention reductions improve shrinker performance by 10-20% in specific inode scenarios. Reflink operations are faster due to reordered locking and flushing. The update also contains error handling fixes, bug fixes, and code clean-ups.

## What changes in Btrfs for Linux 7.4
- **Zstd decompression**: ~+8MB/s throughput increase for transparent compression users
- **Inode extent map lock**: reduced contention yields 10-20% time reduction in shrinker paths for inodes without extent maps
- **Reflink optimization**: reordered locking and flushing targets more common case patterns
- **Additional work**: error handling fixes, bug fixes, and general code clean-ups

## Why it matters
These incremental improvements benefit production Btrfs deployments relying on compression and reflink-heavy workloads such as container image layers and VM disk images. The lock contention reduction specifically addresses latency-sensitive shrinker operations.