Linux 2.6.1 was released on January 9, 2004. Changelog

• Add `gcc -Os' config option commit

• Extensible Firmware Interface (EFI) support commit

• Bridge: Add 4 sysctl entries for bridge netfilter behavioral control commit

• SELinux: Add signal state inheritance control commit

• Message Signaled Interrupt support - MSI for ia32 (LWN article) (commit)

• Add 32bit a.out support for x86-64 commit

• File systems

  • FAT: add readv/writev support commit

  • reiserfs: commit_max_age mount option commit

  • XFS: Add the noikeep mount option, make ikeep the default for now commit

• Drivers

  • USB Lego Infrared Tower support and other things commit

  • dvb: Add new dvb bt8xx driver commit

  • Intel 440gx PCI IDs commit

  • Support centrino 1GHz commit

  • Add support for SGI's IOC4 chipset commit