From: Rik van Riel <riel@surriel.com>
To: Hou Wenlong <houwenlong.hwl@antgroup.com>, linux-kernel@vger.kernel.org
Cc: Dave Hansen <dave.hansen@linux.intel.com>,
Andy Lutomirski <luto@kernel.org>,
Peter Zijlstra <peterz@infradead.org>,
Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
x86@kernel.org, "H. Peter Anvin" <hpa@zytor.com>
Subject: Re: [PATCH 3/3] x86/mm: Fix wrong usage of 'MAX_ASID_AVAILABLE' in global ASID allocation
Date: Sat, 29 Mar 2025 21:11:05 -0400 [thread overview]
Message-ID: <72cab895a33a10d634b672bbc332989d17316fb5.camel@surriel.com> (raw)
In-Reply-To: <55dd1b47ef7c8dd5518878fc682290825570225d.1743250122.git.houwenlong.hwl@antgroup.com>
On Sat, 2025-03-29 at 21:05 +0800, Hou Wenlong wrote:
> 'MAX_ASID_AVAILABLE' represents the maximum valid ASID in the current
> definetion, meaning that the available ASID range is [0,
> MAX_ASID_AVAILABLE]. So the actual count of available ASIDs is
> 'MAX_ASID_AVAIABLE + 1'. However, global ASID allocation use this
> value
> as the size of the bitmap, which results in the maximum ASID number
> being excluded from global ASID allocation. To address this issue,
> redefine the 'MAX_ASID_AVAILABLE' as the count of available ASIDs.
>
> Signed-off-by: Hou Wenlong <houwenlong.hwl@antgroup.com>
Reviewed-by: Rik van Riel <riel@surriel.com>
--
All Rights Reversed.
prev parent reply other threads:[~2025-03-30 1:11 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-03-29 13:05 [PATCH 0/3] Fix some ASID range size calculation issues " Hou Wenlong
2025-03-29 13:05 ` [PATCH 1/3] x86/mm: Correct the actual count of available global ASIDs Hou Wenlong
2025-03-29 17:29 ` Rik van Riel
2025-03-31 3:46 ` Hou Wenlong
2025-03-29 13:05 ` [PATCH 2/3] mm/tlb: Fix wrong judgement in allocate_global_asid() Hou Wenlong
2025-03-29 17:33 ` Rik van Riel
2025-03-31 5:12 ` Hou Wenlong
2025-03-31 12:58 ` Hou Wenlong
2025-03-29 13:05 ` [PATCH 3/3] x86/mm: Fix wrong usage of 'MAX_ASID_AVAILABLE' in global ASID allocation Hou Wenlong
2025-03-30 1:11 ` Rik van Riel [this message]
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