linux-kernel - Re: [PATCH v3 2/7] mm/vmalloc: Track which page-table levels were modified

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Message-ID: <20200519152512.GO8135@suse.de>
Date:   Tue, 19 May 2020 17:25:12 +0200
From:   Joerg Roedel <jroedel@...e.de>
To:     Andrew Morton <akpm@...ux-foundation.org>
Cc:     Joerg Roedel <joro@...tes.org>, x86@...nel.org, hpa@...or.com,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        Andy Lutomirski <luto@...nel.org>,
        Peter Zijlstra <peterz@...radead.org>, rjw@...ysocki.net,
        Arnd Bergmann <arnd@...db.de>,
        Steven Rostedt <rostedt@...dmis.org>,
        Vlastimil Babka <vbabka@...e.cz>,
        Michal Hocko <mhocko@...nel.org>,
        Matthew Wilcox <willy@...radead.org>,
        linux-kernel@...r.kernel.org, linux-acpi@...r.kernel.org,
        linux-arch@...r.kernel.org, linux-mm@...ck.org,
        Christoph Hellwig <hch@...radead.org>
Subject: Re: [PATCH v3 2/7] mm/vmalloc: Track which page-table levels were
 modified

On Mon, May 18, 2020 at 03:18:28PM -0700, Andrew Morton wrote:
> On Sat, 16 May 2020 14:56:41 +0200 Joerg Roedel <jroedel@...e.de> wrote:
> --- a/mm/vmalloc.c~mm-vmalloc-track-which-page-table-levels-were-modified-fix
> +++ a/mm/vmalloc.c
> @@ -309,6 +309,9 @@ int map_kernel_range_noflush(unsigned lo
>  			return err;
>  	} while (pgd++, addr = next, addr != end);
>  
> +	if (mask & ARCH_PAGE_TABLE_SYNC_MASK)
> +		arch_sync_kernel_mappings(start, end);
> +
>  	return 0;
>  }

Yes, this is the right call.

> It would be nice to get all this (ie, linux-next) retested before we
> send it upstream, please.

Will do and report back.


Thanks,

	Joerg