From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 8914143DA2B for ; Fri, 15 May 2026 09:21:58 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1778836918; cv=none; b=e0W+T5yZ9L36ZShCODEWoBjXuDD/wsXADwAFZSasbpIb6YMc4315GhKay79aYuoPsPnXVbchjouRo3EWVVAz9MvITnvoiAapq5eCB42lnhCnO6IFO4iRWJTHD+pfvShwTT5o+4ZreLOfwzVtPCsOom0Nkj1ivJHshYeP9trZNdE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1778836918; c=relaxed/simple; bh=krDixN9cImzUINNa6Us33zC5coP7rdNz9y3siAFvjPM=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=jlH0I1E2Rrl3DYYxlPDvCZTf7RnujqvZAVlDRjHXvkzONTh/w9lLUOBn4IWdA0KQgXWba7FZi2QpX3xumldXW9vhsBrKAT58ZfS6EzyAtCKnide7VV0EQOxx9yeSE47opnFRc2Vb94eJG2Peg9a/oMiuxKZjCZvpP1uzD+1oFas= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=vZtU9Dt5; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="vZtU9Dt5" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 0F51FC2BCB0; Fri, 15 May 2026 09:21:57 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1778836918; bh=krDixN9cImzUINNa6Us33zC5coP7rdNz9y3siAFvjPM=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=vZtU9Dt5WIVq0BK/9r6wJhbJ52OVVUzbQN24aCI1+8o4UcoYz09Gg2mVSu8du25RI NdNOI4J7J/JnyAJaYL01s5DEJNQJAEYLuOmkQHmaKMFk80eZ3IxDz3Nkqm6TjYCoXz NEHhXCwNI+hLozBES6iWNJXIJZPYzGyqpYWHNRcU= Date: Fri, 15 May 2026 11:22:02 +0200 From: Greg KH To: Ahmed Elaidy Cc: Andrei Vagin , stable@vger.kernel.org, lorenzo.stoakes@oracle.com, akpm@linux-foundation.org, linux-mm@kvack.org Subject: Re: [PATCH 6.18.y v3] mm: fix VM_SOFTDIRTY propagation on VMA merge Message-ID: <2026051531-failing-nectar-83bf@gregkh> References: <20260504195447.31794-1-elaidya225@gmail.com> Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20260504195447.31794-1-elaidya225@gmail.com> On Mon, May 04, 2026 at 10:54:47PM +0300, Ahmed Elaidy wrote: > During VMA merging, such as through mprotect(), VM_SOFTDIRTY flags could be > lost. This breaks tools relying on soft-dirty tracking, such as CRIU > incremental dump/restore. > > Upstream resolved this using a broader VM_STICKY infrastructure (commit > bf14d4a05387 "mm: propagate VM_SOFTDIRTY on merge"). To minimize churn and > risk in the stable 6.18.y tree, this patch skips backporting the entire > VM_STICKY series (9 patches). Instead, it introduces a minimal standalone fix. 9 patches is nothing. Please just backport the whole thing, especially as we will be maintaining this kernel for a long time. We want what is upstream for future issues/fixes, right? thanks, greg k-h