On Tuesday 11 March 2025 21:06:16 Armin Wolf wrote: > - Is there any way to check whether the Doublespace compression algorithm is still encumbered by patents? Linux kernel 2.2 or 2.4 had full read/write support for doublespace compression algorithm in mainline kernel and it was connected with fat driver. IIRC it was dropped for kernel 2.6 because nobody ported that vfat code to new fs API and hence doublespace in-kernel compression algorithm was not needed/used anymore. But I do not remember details. So IMHO it should not be a problem to reintroduce same code into kernel again if there is a new need for it. And in my project I reused the doublespace compression code from old Linux kernel.
