On Tuesday 11 March 2025 21:59:29 Armin Wolf wrote: > Am 11.03.25 um 21:13 schrieb Pali Rohár: > > > 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. > > AFAIK only the CVF code used by the dmsdos driver was inside the mainline kernel, > but not the dmsdos driver itself. Ok, probably I remember it incorrectly. It is too long ago.
