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From: Andrew Morton <akpm@linux-foundation.org>
To: Juergen Gross <jgross@suse.com>
Cc: linux-mm@kvack.org, mhocko@suse.com,
	linux-kernel@vger.kernel.org, stable@vger.kernel.org,
	xen-devel@lists.xenproject.org
Subject: Re: [RESEND v2] mm: don't defer struct page initialization for Xen pv guests
Date: Fri, 16 Feb 2018 12:43:57 -0800	[thread overview]
Message-ID: <20180216124357.de2cb8fe96c07dea51556adb__7534.95782050795$1518813776$gmane$org@linux-foundation.org> (raw)
In-Reply-To: <20180216154101.22865-1-jgross@suse.com>

On Fri, 16 Feb 2018 16:41:01 +0100 Juergen Gross <jgross@suse.com> wrote:

> --- a/mm/page_alloc.c
> +++ b/mm/page_alloc.c
> @@ -347,6 +347,9 @@ static inline bool update_defer_init(pg_data_t *pgdat,
>  	/* Always populate low zones for address-constrained allocations */
>  	if (zone_end < pgdat_end_pfn(pgdat))
>  		return true;
> +	/* Xen PV domains need page structures early */
> +	if (xen_pv_domain())
> +		return true;

I'll do this:

--- a/mm/page_alloc.c~mm-dont-defer-struct-page-initialization-for-xen-pv-guests-fix
+++ a/mm/page_alloc.c
@@ -46,6 +46,7 @@
 #include <linux/stop_machine.h>
 #include <linux/sort.h>
 #include <linux/pfn.h>
+#include <xen/xen.h>
 #include <linux/backing-dev.h>
 #include <linux/fault-inject.h>
 #include <linux/page-isolation.h>

So we're not relying on dumb luck ;)

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  parent reply	other threads:[~2018-02-16 20:44 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-02-16 15:41 [RESEND v2] mm: don't defer struct page initialization for Xen pv guests Juergen Gross
2018-02-16 15:41 ` Juergen Gross
2018-02-16 20:40 ` Andrew Morton
2018-02-16 20:40   ` Andrew Morton
2018-02-17 15:32   ` Pavel Tatashin
2018-02-17 15:32     ` Pavel Tatashin
2018-02-17 15:32   ` Pavel Tatashin
2018-02-16 20:40 ` Andrew Morton
2018-02-16 20:43 ` Andrew Morton
2018-02-16 20:43   ` Andrew Morton
2018-02-16 20:43 ` Andrew Morton [this message]
  -- strict thread matches above, loose matches on Subject: below --
2018-02-16 15:41 Juergen Gross

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