Received-SPF: pass (google.com: domain of linux-kernel+bounces-18131-linux.lists.archive=gmail.com@vger.kernel.org designates 2604:1380:40f1:3f00::1 as permitted sender) client-ip=2604:1380:40f1:3f00::1;
Date: Fri, 5 Jan 2024 09:40:41 -0800
From: Breno Leitao <leitao@debian.org>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: riel@surriel.com, linux-mm@kvack.org, vegard.nossum@oracle.com,
	rppt@kernel.org, songmuchun@bytedance.com, shy828301@gmail.com,
	linux-kselftest@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH 0/1] selftest/mm/hugetlb: SIGBUS on stolen page
Message-ID: <ZZg/GfXCeovU0eeN@gmail.com>
References: <20240105155419.1939484-1-leitao@debian.org>
 <20240105084238.306269c3f3a63cb0fd130baa@linux-foundation.org>
Precedence: bulk
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <20240105084238.306269c3f3a63cb0fd130baa@linux-foundation.org>

On Fri, Jan 05, 2024 at 08:42:38AM -0800, Andrew Morton wrote:
> On Fri,  5 Jan 2024 07:54:18 -0800 Breno Leitao <leitao@debian.org> wrote:
> 
> > This test case triggers a race between madvise(MADV_DONTNEED) and
> > mmap() in a single huge page, which got stolen (while reserved).
> > 
> > Once the only page is stolen, the memory previously mmaped (and
> > madvise(MADV_DONTNEED) got a SIGBUS when accessed.
> > 
> > I am not adding this test to the un_vmtests.sh scripts, since this test
> > fails at upstream.
> 
> Oh.  Is a fix for this in the pipeline?  If so, I assume that once the
> fix is merged, we enable this test in run_vmtests?

The fix is not ready yet. As soon as the fix lands, I will enable the
test in run_vmtests.