linux-kernel - Re: [RFC][alpha] saner vmalloc handling (was Re: [Bug report] hash_name() may cross page boundary and trigger sleep in RCU context)

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Message-ID: <20251130203259.GX3538@ZenIV>
Date: Sun, 30 Nov 2025 20:32:59 +0000
From: Al Viro <viro@...iv.linux.org.uk>
To: david laight <david.laight@...box.com>
Cc: Linus Torvalds <torvalds@...ux-foundation.org>,
	akpm@...ux-foundation.org, linux-kernel@...r.kernel.org,
	linux-mm@...ck.org, linux-alpha@...r.kernel.org
Subject: Re: [RFC][alpha] saner vmalloc handling (was Re: [Bug report]
 hash_name() may cross page boundary and trigger sleep in RCU context)

On Sun, Nov 30, 2025 at 08:31:18PM +0000, Al Viro wrote:
> It certainly can happen on x86 - two vmalloc(SZ_4M) in parallel

32bit x86, that is.

> will do just that, but with NUMA you can get it 64bit boxen
> as well.