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Date: Wed, 27 May 2026 22:39:26 +0200
From: Karsten Desler <kdesler@soohrt.org>
To: "Oscar Salvador \(SUSE\)" <osalvador@kernel.org>
Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org,
  Thomas Gleixner <tglx@linutronix.de>, Ingo Molnar <mingo@redhat.com>,
  Borislav Petkov <bp@alien8.de>, Dave Hansen <dave.hansen@linux.intel.com>,
  "H. Peter Anvin" <hpa@zytor.com>
Subject: Re: [REGRESSION] x86/hugetlb: AMD F15h VA alignment offset breaks
 MAP_HUGETLB alignment
Message-ID: <20260527203926.GP31091@soohrt.org>
References: <20260527143643.GO31091@soohrt.org>
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User-Agent: Mutt/1.5.21 (2010-09-15)

* Oscar Salvador (SUSE) wrote:
> Maybe this? Can you give it a shot?

Thanks, applied and tested across 5 reboots.
All mmaps return properly aligned hugepages, don't cause kernelBUGs
on exit and show the expected munmap behavior.

mmap(NULL, 1229824, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_POPULATE|MAP_HUGETLB, -1, 0) = 0x7f7e49a00000
munmap(0x7f7e49a00000, 1229824)         = -1 EINVAL (Invalid argument)
munmap(0x7f7e49a00000, 2097152)         = 0

Best regards,
 Karsten