linux-kernel - [Regression] hangs caused by commit 3202fa62fb (slub: relocate freelist pointer to middle of object)

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Date:   Tue, 21 Jul 2020 16:55:12 +0200
From:   Paul Menzel <pmenzel@...gen.mpg.de>
To:     Kees Cook <keescook@...omium.org>,
        Andrew Morton <akpm@...ux-foundation.org>
Cc:     LKML <linux-kernel@...r.kernel.org>, amd-gfx@...ts.freedesktop.org,
        Duncan <1i5t5.duncan@....net>,
        Anthony Ruhier <anthony.ruhier@...il.com>,
        Vinicius <mphantomx@...oo.com.br>,
        Thorsten Leemhuis <regressions@...mhuis.info>
Subject: [Regression] hangs caused by commit 3202fa62fb (slub: relocate
 freelist pointer to middle of object)

Dear Kees, dear Andrew,

No idea, if you are aware of it yet, but three people verified that 
commit 3202fa62fb (slub: relocate freelist pointer to middle of object) 
causes a regression on AMD hardware [1].

It’d be great, if you took a look, and advised if this commit (and 
follow-ups) should be reverted, until the issue is analyzed.

Kind regards,

Paul

[1]: https://bugzilla.kernel.org/show_bug.cgi?id=207383
      "[Regression] 5.7 amdgpu/polaris11 gpf: amdgpu_atomic_commit_tail"