linux-hardening - Re: [PATCH v2 1/2] mm/memblock: Add "reserve

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Message-ID: <20240611133418.4a32086b@gandalf.local.home>
Date: Tue, 11 Jun 2024 13:34:18 -0400
From: Steven Rostedt <rostedt@...dmis.org>
To: Mike Rapoport <rppt@...nel.org>
Cc: Wei Yang <richard.weiyang@...il.com>, linux-kernel@...r.kernel.org,
 linux-trace-kernel@...r.kernel.org, Masami Hiramatsu <mhiramat@...nel.org>,
 Mark Rutland <mark.rutland@....com>, Mathieu Desnoyers
 <mathieu.desnoyers@...icios.com>, Andrew Morton
 <akpm@...ux-foundation.org>, "Liam R. Howlett" <Liam.Howlett@...cle.com>,
 Vlastimil Babka <vbabka@...e.cz>, Lorenzo Stoakes <lstoakes@...il.com>,
 linux-mm@...ck.org, Thomas Gleixner <tglx@...utronix.de>, Ingo Molnar
 <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>, Dave Hansen
 <dave.hansen@...ux.intel.com>, x86@...nel.org, "H. Peter Anvin"
 <hpa@...or.com>, Peter Zijlstra <peterz@...radead.org>, Kees Cook
 <keescook@...omium.org>, Tony Luck <tony.luck@...el.com>, "Guilherme G.
 Piccoli" <gpiccoli@...lia.com>, linux-hardening@...r.kernel.org, Guenter
 Roeck <linux@...ck-us.net>, Ross Zwisler <zwisler@...gle.com>,
 wklin@...gle.com, Vineeth Remanan Pillai <vineeth@...byteword.org>, Joel
 Fernandes <joel@...lfernandes.org>, Suleiman Souhlal <suleiman@...gle.com>,
 Linus Torvalds <torvalds@...uxfoundation.org>, Catalin Marinas
 <catalin.marinas@....com>, Will Deacon <will@...nel.org>, Ard Biesheuvel
 <ardb@...nel.org>
Subject: Re: [PATCH v2 1/2] mm/memblock: Add "reserve_mem" to reserved named
 memory at boot up

On Tue, 11 Jun 2024 19:30:47 +0300
Mike Rapoport <rppt@...nel.org> wrote:

> > I don't know if we care what the align is. Zero is valid.  
> 
> memblock won't like zero align, it should be SMP_CACHE_BYTES at least.
> No point requiring it from user, just update the alignment if the user passed
> zero.

Thanks, will do in v4.

-- Steve