Seems like the linux-kernel recently really gets some love in terms of preemptibility for much lower latency which (might lead) leads to better responsiveness at the desktop / X, too:
[PATCH 00/20] mm: Preemptibility -v4
this first will get into -next when people feel like it's ready
[PATCH 00/20] mm: Preemptibility -v4
this first will get into -next when people feel like it's ready
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