linux-kernel - Re: [PATCH v7 00/16] mm: jit/text allocator

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Date: Thu, 2 May 2024 23:50:36 +0100
From: Liviu Dudau <liviu@...au.co.uk>
To: Luis Chamberlain <mcgrof@...nel.org>
Cc: Mike Rapoport <rppt@...nel.org>, linux-kernel@...r.kernel.org,
	Alexandre Ghiti <alexghiti@...osinc.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Björn Töpel <bjorn@...nel.org>,
	Catalin Marinas <catalin.marinas@....com>,
	Christophe Leroy <christophe.leroy@...roup.eu>,
	"David S. Miller" <davem@...emloft.net>,
	Dinh Nguyen <dinguyen@...nel.org>,
	Donald Dutile <ddutile@...hat.com>,
	Eric Chanudet <echanude@...hat.com>,
	Heiko Carstens <hca@...ux.ibm.com>, Helge Deller <deller@....de>,
	Huacai Chen <chenhuacai@...nel.org>,
	Kent Overstreet <kent.overstreet@...ux.dev>,
	Mark Rutland <mark.rutland@....com>,
	Masami Hiramatsu <mhiramat@...nel.org>,
	Michael Ellerman <mpe@...erman.id.au>,
	Nadav Amit <nadav.amit@...il.com>,
	Palmer Dabbelt <palmer@...belt.com>,
	Peter Zijlstra <peterz@...radead.org>,
	Philippe Mathieu-Daudé <philmd@...aro.org>,
	Rick Edgecombe <rick.p.edgecombe@...el.com>,
	Russell King <linux@...linux.org.uk>,
	Sam Ravnborg <sam@...nborg.org>, Song Liu <song@...nel.org>,
	Steven Rostedt <rostedt@...dmis.org>,
	Thomas Bogendoerfer <tsbogend@...ha.franken.de>,
	Thomas Gleixner <tglx@...utronix.de>, Will Deacon <will@...nel.org>,
	bpf@...r.kernel.org, linux-arch@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org, linux-mips@...r.kernel.org,
	linux-mm@...ck.org, linux-modules@...r.kernel.org,
	linux-parisc@...r.kernel.org, linux-riscv@...ts.infradead.org,
	linux-s390@...r.kernel.org, linux-trace-kernel@...r.kernel.org,
	linuxppc-dev@...ts.ozlabs.org, loongarch@...ts.linux.dev,
	netdev@...r.kernel.org, sparclinux@...r.kernel.org, x86@...nel.org
Subject: Re: [PATCH v7 00/16] mm: jit/text allocator

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)" <rppt@...nel.org>
> > 
> > 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:

CONFIG_HAVE_KERNEL_XZ=y
CONFIG_MIPS=y
CONFIG_RALINK=y
CONFIG_SOC_MT7621=y
CONFIG_EXECMEM=y
CONFIG_MODULES_USE_ELF_REL=y
CONFIG_MODULES=y
# CONFIG_MODULE_DEBUG is not set
# CONFIG_MODULE_FORCE_LOAD is not set
CONFIG_MODULE_UNLOAD=y
# CONFIG_MODULE_FORCE_UNLOAD is not set
# CONFIG_MODULE_UNLOAD_TAINT_TRACKING is not set
# CONFIG_MODULE_SRCVERSION_ALL is not set
# CONFIG_MODULE_SIG is not set
# CONFIG_MODULE_COMPRESS_NONE is not set
# CONFIG_MODULE_COMPRESS_GZIP is not set
CONFIG_MODULE_COMPRESS_XZ=y
# CONFIG_MODULE_COMPRESS_ZSTD is not set
CONFIG_MODULE_DECOMPRESS=y
# CONFIG_MODULE_ALLOW_MISSING_NAMESPACE_IMPORTS is not set
CONFIG_MODULES_TREE_LOOKUP=y


Best regards,
Liviu


> 
>   Luis
> 

-- 
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!