Kernel Log: What's new in 2.6.29 - Part 6:
This development cycle once again included many changes to the kernel's IDE subsystem, which mainly controls parallel ATA adapters (generally referred to as "IDE adapters", 1, 2, 3). Bartlomiej Zolnierkiewicz, who maintains this kernel area, ported a Libata driver for the CS5536 to the IDE subsystem and reintroduced the IT8172 driver for ITE's chip of the same name, which was removed in 2.6.18. Major changes were also made to several basic kernel features – one of them, for example, invalidates the "ide=nodma" kernel parameter.
These changes are unlikely to have any major effects on most users, as most current Linux distributions have predominantly used the Libata subsystem's drivers for parallel and serial ATA (SATA) adapters for quite some time. The Libata-based PATA drivers introduced with 2.6.19 are, therefore, by now likely to have undergone considerably better testing than their essentially older IDE counterparts, as the IDE subsystem has been subject to constant transformation over the past few months. How long the kernel developers intend to continue maintaining these two driver varieties is uncertain. Originally, the old IDE subsystem was expected to be removed once the Libata PATA drivers have been established; but now this doesn't seem likely any time soon.
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