linux-kernel - Re: commit 7ffb791423c7 breaks steam game

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Message-ID: <d2158680b8962c248c9faada97f2a93b3fef1842.camel@web.de>
Date: Fri, 21 Mar 2025 13:26:34 +0100
From: Bert Karwatzki <spasswolf@....de>
To: Balbir Singh <balbirs@...dia.com>, Alex Deucher <alexdeucher@...il.com>
Cc: Ingo Molnar <mingo@...nel.org>, Kees Cook <kees@...nel.org>, Bjorn
 Helgaas	 <bhelgaas@...gle.com>, Linus Torvalds
 <torvalds@...ux-foundation.org>, Peter Zijlstra <peterz@...radead.org>,
 Andy Lutomirski <luto@...nel.org>, linux-kernel@...r.kernel.org, 
	amd-gfx@...ts.freedesktop.org, spasswolf@....de
Subject: Re: commit 7ffb791423c7 breaks steam game

> >
>
> I am not an expert in amdgpu or gtt_mgr, but I wonder if some of the deletes are coming
> from forceful eviction  of memory during allocation?
>
> Have you filed a bug report for the nokaslr case?
>
> Balbir Singh

I did some more monitoring and in the BAD case ttm_global_swapout() is called
585 times leading to 54495 calls to ttm_bo_swapout_cb() while in the GOOD both
function are called 0 times.

Bert Karwatzki