From: Andrew Morton <akpm@linux-foundation.org>
To: Martin Cracauer <cracauer@cons.org>
Cc: linux-mm@kvack.org, david@kernel.org, ljs@kernel.org,
liam@infradead.org, vbabka@kernel.org, rppt@kernel.org,
surenb@google.com, mhocko@suse.com, shuah@kernel.org,
peterx@redhat.com, linux-kernel@vger.kernel.org,
linux-kselftest@vger.kernel.org
Subject: Re: [PATCH] selftests/mm: uffd-missing-wp: add GC related functionality test
Date: Sun, 27 Sep 2026 20:38:18 -0700 [thread overview]
Message-ID: <20260927203818.2f4b34b37f4a6e1685c3d142@linux-foundation.org> (raw)
In-Reply-To: <arneZ-KkRWUNI0Ho@cons.org>
On Sun, 27 Sep 2026 23:26:31 -0400 Martin Cracauer <cracauer@cons.org> wrote:
> Add a test that asserts that functionality needed for generational
> garbage collection works. Namely to implement a write barrier using
> userfaultfd instead of using segmentation faults. The planned target
> is the GC in SBCL.
>
> The real GC will initially fill heap pages by using on-demand loading
> of pages from an image file, either via mmap(2) or using userfaultfd
> to decompress a page read from an image file made from individually
> compressed blocks. This test doesn't do that so that it needs no disk
> I/O and no decompression library. Instead, a fault will be filled by
> copying page content from prepared pages in the heap.
Thanks. Sashiko asked a couple of things:
https://sashiko.dev/#/patchset/arneZ-KkRWUNI0Ho@cons.org
next prev parent reply other threads:[~2026-09-28 3:38 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-09-28 3:26 Martin Cracauer
2026-09-28 3:38 ` Andrew Morton [this message]
2026-09-28 8:53 ` David Hildenbrand (Arm)
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