[Bug 198511] lags in youtube videos 1080p 60fps with radeon hd4650 and kernel 4.15rc8

[bugzilla-daemon at bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=198511

--- Comment #18 from Barto (mister.freeman at laposte.net) ---
here is the output of "cat /sys/kernel/debug/dri/0/ttm_dma_page_pool" with
kernel 4.15rc8 when I play a youtube video hd at 60 fps in full screen mode :


         pool      refills   pages freed    inuse available     name
           wc          801             0     2834      370 radeon 0000:01:00.0
       wchuge         1079          4307        6        3 radeon 0000:01:00.0
       cached        10663         42097      552        3 radeon 0000:01:00.0
   cachedhuge            6            19        0        5 radeon 0000:01:00.0

I will try to compile kernel 4.15rc8 with CONFIG_SWIOTLB disabled

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