From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.dudau.co.uk (dliviu.plus.com [80.229.23.120]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id AA52015216E; Fri, 3 May 2024 10:40:26 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=80.229.23.120 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1714732830; cv=none; b=m5ARKlLIVjxAQlxbyYlsVmMkUU6190OQMrBAvAB5kIqFl6V77mA2LuvXrhawULjXPH76SkjC9b4khTHMp7Cqtxi3v+riNoZF2NRA93kAnuNSHM74OUHs5dgf4tW+4PGa5ptw7J7pc3a7Mx4YK2HCmnZkLH0zDwQQuKEmBGA+S9w= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1714732830; c=relaxed/simple; bh=NpdsWyTw4OKoBRbcIx2lZ8CMZGfJPFah7iRoEnptoa4=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=hIXaa6W11DFqfNcmMSwUgIbw/4fndQbBpZCjRq5R5biggvOeKCjFkwXyX4334Es1CPfEtWbpX3moGze7dd+a0djgEOVFn6r4tUECzu0PCUvQlWhG8v17J23fHJ2uvU68jl7vnLFcHIlhUmEtIIFiBQxUcAxdXNRvI5tJxg83jQs= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=dudau.co.uk; spf=pass smtp.mailfrom=dudau.co.uk; arc=none smtp.client-ip=80.229.23.120 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=dudau.co.uk Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=dudau.co.uk Received: from mail.dudau.co.uk (bart.dudau.co.uk [192.168.14.2]) by smtp.dudau.co.uk (Postfix) with SMTP id E754641D12F0; Fri, 03 May 2024 11:40:22 +0100 (BST) Received: by mail.dudau.co.uk (sSMTP sendmail emulation); Fri, 03 May 2024 11:40:22 +0100 Date: Fri, 3 May 2024 11:40:22 +0100 From: Liviu Dudau To: Mike Rapoport Cc: Luis Chamberlain , linux-kernel@vger.kernel.org, Alexandre Ghiti , Andrew Morton , =?utf-8?B?QmrDtnJuIFTDtnBlbA==?= , Catalin Marinas , Christophe Leroy , "David S. Miller" , Dinh Nguyen , Donald Dutile , Eric Chanudet , Heiko Carstens , Helge Deller , Huacai Chen , Kent Overstreet , Mark Rutland , Masami Hiramatsu , Michael Ellerman , Nadav Amit , Palmer Dabbelt , Peter Zijlstra , Philippe =?utf-8?Q?Mathieu-Daud=C3=A9?= , Rick Edgecombe , Russell King , Sam Ravnborg , Song Liu , Steven Rostedt , Thomas Bogendoerfer , Thomas Gleixner , Will Deacon , bpf@vger.kernel.org, linux-arch@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-mips@vger.kernel.org, linux-mm@kvack.org, linux-modules@vger.kernel.org, linux-parisc@vger.kernel.org, linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org, linux-trace-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, loongarch@lists.linux.dev, netdev@vger.kernel.org, sparclinux@vger.kernel.org, x86@kernel.org Subject: Re: [PATCH v7 00/16] mm: jit/text allocator Message-ID: References: <20240429121620.1186447-1-rppt@kernel.org> Precedence: bulk X-Mailing-List: linux-parisc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: On Fri, May 03, 2024 at 09:28:25AM +0300, Mike Rapoport wrote: > On Fri, May 03, 2024 at 01:23:30AM +0100, Liviu Dudau wrote: > > On Thu, May 02, 2024 at 04:07:05PM -0700, Luis Chamberlain wrote: > > > On Thu, May 02, 2024 at 11:50:36PM +0100, Liviu Dudau wrote: > > > > On Mon, Apr 29, 2024 at 09:29:20AM -0700, Luis Chamberlain wrote: > > > > > On Mon, Apr 29, 2024 at 03:16:04PM +0300, Mike Rapoport wrote: > > > > > > From: "Mike Rapoport (IBM)" > > > > > > > > > > > > Hi, > > > > > > > > > > > > The patches are also available in git: > > > > > > https://git.kernel.org/pub/scm/linux/kernel/git/rppt/linux.git/log/?h=execmem/v7 > > > > > > > > > > > > v7 changes: > > > > > > * define MODULE_{VADDR,END} for riscv32 to fix the build and avoid > > > > > > #ifdefs in a function body > > > > > > * add Acks, thanks everybody > > > > > > > > > > Thanks, I've pushed this to modules-next for further exposure / testing. > > > > > Given the status of testing so far with prior revisions, in that only a > > > > > few issues were found and that those were fixed, and the status of > > > > > reviews, this just might be ripe for v6.10. > > > > > > > > Looks like there is still some work needed. I've picked up next-20240501 > > > > and on arch/mips with CONFIG_MODULE_COMPRESS_XZ=y and CONFIG_MODULE_DECOMPRESS=y > > > > I fail to load any module: > > > > > > > > # modprobe rfkill > > > > [11746.539090] Invalid ELF header magic: != ELF > > > > [11746.587149] execmem: unable to allocate memory > > > > modprobe: can't load module rfkill (kernel/net/rfkill/rfkill.ko.xz): Out of memory > > > > > > > > The (hopefully) relevant parts of my .config: > > > > > > Thanks for the report! Any chance we can get you to try a bisection? I > > > think it should take 2-3 test boots. To help reduce scope you try modules-next: > > > > > > https://git.kernel.org/pub/scm/linux/kernel/git/mcgrof/linux.git/log/?h=modules-next > > > > > > Then can you check by resetting your tree to commmit 3fbe6c2f820a76 (mm: > > > introduce execmem_alloc() and execmem_free()"). I suspect that should > > > boot, so your bad commit would be the tip 3c2c250cb3a5fbb ("bpf: remove > > > CONFIG_BPF_JIT dependency on CONFIG_MODULES of"). > > > > > > That gives us only a few commits to bisect: > > > > > > git log --oneline 3fbe6c2f820a76bc36d5546bda85832f57c8fce2.. > > > 3c2c250cb3a5 (HEAD -> modules-next, korg/modules-next) bpf: remove CONFIG_BPF_JIT dependency on CONFIG_MODULES of > > > 11e8e65cce5c kprobes: remove dependency on CONFIG_MODULES > > > e10cbc38697b powerpc: use CONFIG_EXECMEM instead of CONFIG_MODULES where appropriate > > > 4da3d38f24c5 x86/ftrace: enable dynamic ftrace without CONFIG_MODULES > > > 13ae3d74ee70 arch: make execmem setup available regardless of CONFIG_MODULES > > > 460bbbc70a47 powerpc: extend execmem_params for kprobes allocations > > > e1a14069b5b4 arm64: extend execmem_info for generated code allocations > > > 971e181c6585 riscv: extend execmem_params for generated code allocations > > > 0fa276f26721 mm/execmem, arch: convert remaining overrides of module_alloc to execmem > > > 022cef244287 mm/execmem, arch: convert simple overrides of module_alloc to execmem > > > > > > With 2-3 boots we should be to tell which is the bad commit. > > > > Looks like 0fa276f26721 is the first bad commit. > > > > $ git bisect log > > # bad: [3c2c250cb3a5fbbccc4a4ff4c9354c54af91f02c] bpf: remove CONFIG_BPF_JIT dependency on CONFIG_MODULES of > > # good: [3fbe6c2f820a76bc36d5546bda85832f57c8fce2] mm: introduce execmem_alloc() and execmem_free() > > git bisect start '3c2c250cb3a5' '3fbe6c2f820a76' > > # bad: [460bbbc70a47e929b1936ca68979f3b79f168fc6] powerpc: extend execmem_params for kprobes allocations > > git bisect bad 460bbbc70a47e929b1936ca68979f3b79f168fc6 > > # bad: [0fa276f26721e0ffc2ae9c7cf67dcc005b43c67e] mm/execmem, arch: convert remaining overrides of module_alloc to execmem > > git bisect bad 0fa276f26721e0ffc2ae9c7cf67dcc005b43c67e > > # good: [022cef2442870db738a366d3b7a636040c081859] mm/execmem, arch: convert simple overrides of module_alloc to execmem > > git bisect good 022cef2442870db738a366d3b7a636040c081859 > > # first bad commit: [0fa276f26721e0ffc2ae9c7cf67dcc005b43c67e] mm/execmem, arch: convert remaining overrides of module_alloc to execmem > > > > Maybe MIPS also needs a ARCH_WANTS_EXECMEM_LATE? > > I don't think so. It rather seems there's a bug in the initialization of > the defaults in execmem. This should fix it: > > diff --git a/mm/execmem.c b/mm/execmem.c > index f6dc3fabc1ca..0c4b36bc6d10 100644 > --- a/mm/execmem.c > +++ b/mm/execmem.c > @@ -118,7 +118,6 @@ static void __init __execmem_init(void) > info->ranges[EXECMEM_DEFAULT].end = VMALLOC_END; > info->ranges[EXECMEM_DEFAULT].pgprot = PAGE_KERNEL_EXEC; > info->ranges[EXECMEM_DEFAULT].alignment = 1; > - return; > } > > if (!execmem_validate(info)) > That does, indeed, fix the issue! You can add my Tested-by when you submit the patch. Best regards, Liviu > > -- > Sincerely yours, > Mike. > -- Everyone who uses computers frequently has had, from time to time, a mad desire to attack the precocious abacus with an axe. -- John D. Clark, Ignition!