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b=YCMQw9cX13xqhIwBzSMliTFI1BR50NKpER6op4F/axoQCrr9l0XXf6aKT61a2MYnZ 5capFidkNb48gSEu2nhvuhjUmkOoDQEfunJtlKE33rLoPt/132APCimNjZZlyAnfGo BgCXLAb9ZOJGA+56e3kydME3r/Rqy83Tazx1Hgk12gMgLAooFzIbdO92+wgszDwoI7 0wcOm97VS0aIQkcxex3zRx0W1YJhM3LnzW3wvpPufqpPdX1MU9kssrpgnzzKDjtoez tU76c1ClWcl1zqN9EOl4Ujjk7ElqmJTjv6Z92YxS/B01A0Me3ruXGE38icwJuqHZhX mysf0URYpxqRw== Date: Mon, 28 Sep 2026 12:00:19 +0100 From: "Lorenzo Stoakes (ARM)" To: Johannes Berg Cc: Hajime Tazaki , linux-mm@kvack.org, liam@infradead.org, rbm@suse.com, akpm@linux-foundation.org, luto@amacapital.net, brendan.jackman@linux.dev, david@kernel.org, liuhangbin@gmail.com, corbet@lwn.net, kees@kernel.org, broonie@kernel.org, mhocko@suse.com, rppt@kernel.org, shuah@kernel.org, surenb@google.com, vbabka@kernel.org, wad@chromium.org, linux-doc@vger.kernel.org, linux-kselftest@vger.kernel.org, linux-um@lists.infradead.org, geert@linux-m68k.org, daniel@thingy.jp Subject: Re: [PATCH v3 2/3] selftests: run tests on nommu architecture Message-ID: References: <20260926010819.604346-1-thehajime@gmail.com> <20260926010819.604346-3-thehajime@gmail.com> <04259a99ed91f8a527b255951a6f626310728170.camel@sipsolutions.net> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <04259a99ed91f8a527b255951a6f626310728170.camel@sipsolutions.net> X-Stat-Signature: kj5bio4ocdy6a5u447fjh3s9j6rizguo X-Rspam-User: X-Rspamd-Server: rspam09 X-Rspamd-Queue-Id: C75C24000B X-HE-Tag: 1790593228-530726 X-HE-Meta: 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 53YmVJhe LuPyqC/TvgxO4qJhEiC/e4X2I1X9QkBCPzI+mSHxYbscQcCLudZ0YEuCNgDc9G1kIZggn0uWwUYldQ0Jfo9ipWS/24DSq6BF/EhnPXkkUxRzR3T51ApjKJkDnA4zDeGYrHoT/QTkdmkgh559ALNNtXzuCtT0ktM0suyM18JC6Ac5z1aZ7MViLVbNi1wGjdAtn4BS2YCSVsweHjDrFobDsKtnxkeOOS3WF0PPfVaaeyygDXr/7zhF0gmAXDk0BQ2XIqTbr Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On Mon, Sep 28, 2026 at 09:44:49AM +0200, Johannes Berg wrote: > On Sat, 2026-09-26 at 10:08 +0900, Hajime Tazaki wrote: > > Architectures lacks MMU doesn't support fork(2) syscall and only > > nit: Architectures lacking MMU don't support the fork(2) syscall ... > > Not sure where this should be merged? I guess selftests would make most > sense, but you can't actually test it out before the UML nommu changes, > so that doesn't work too well right now? I seem to recall Hajime saying he tested this on an actual nommu device/virtualised equivalent so nommu UML isn't strictly necessary (though very nice to have!) I think I saw something fly by that implied it might be coming in 7.4 is that so? :) > > johannes -- Cheers, Lorenzo