I've to maintain a production system on debian6 (kernel version 2.6.32). I'd like to use ext4 on a ssd disk (and generally hope to improve performance upgrading from ext3). I can't find any reference about the ext4 state on that kernel/distribution. Thanks in advance.
I don't use debian but if it can help you, RHEL6 (2.6.32 kernel) uses ext4 as the default fs even for the boot partition since 2010, and I never had any issue with it. Not sure you'll get big performances boosts, sure it got some better algorithms and some tweaked functions but it honestly depends on the kind of usage of the disk.