> > To: sunqiuyang
> > > Cc: linux-kernel@vger.kernel.org; linux...@kvack.org
> > > Subject: Re: [PATCH 1/1] mm/migrate: fix list corruption in migration of
> > > non-LRU movable pages
> > >
> > > On Wed 04-09-19 12:19:11, sunqiuyang wrote:
&g
On Tue 10-09-19 12:23:04, Minchan Kim wrote:
> On Tue, Sep 03, 2019 at 04:27:46PM +0800, sunqiuyang wrote:
> > From: Qiuyang Sun
> >
> > Currently, after a page is migrated, it
> > 1) has its PG_isolated flag cleared in move_to_new_page(), and
> > 2) is deleted from its LRU list
On Tue, Sep 03, 2019 at 04:27:46PM +0800, sunqiuyang wrote:
> From: Qiuyang Sun
>
> Currently, after a page is migrated, it
> 1) has its PG_isolated flag cleared in move_to_new_page(), and
> 2) is deleted from its LRU list (cc->migratepages) in unmap_and_move().
> However, between steps 1) and
; > Subject: Re: [PATCH 1/1] mm/migrate: fix list corruption in migration of
> > non-LRU movable pages
> >
> > On Wed 04-09-19 12:19:11, sunqiuyang wrote:
> > > > Do not top post please
> > > >
> > > > On Wed 04-09-19 07:27:25,
From: Michal Hocko [mho...@kernel.org]
Sent: Wednesday, September 04, 2019 20:52
To: sunqiuyang
Cc: linux-kernel@vger.kernel.org; linux...@kvack.org
Subject: Re: [PATCH 1/1] mm/migrate: fix list corruption in migration of
non-LRU movable pages
On Wed 04
On Wed 04-09-19 12:19:11, sunqiuyang wrote:
> > Do not top post please
> >
> > On Wed 04-09-19 07:27:25, sunqiuyang wrote:
> > > isolate_migratepages_block() from another thread may try to isolate the
> > > page again:
> > >
> > > for (; low_pfn < end_pfn; low_pfn++) {
> > > /* ... */
> > >
From: Michal Hocko [mho...@kernel.org]
Sent: Wednesday, September 04, 2019 16:14
To: sunqiuyang
Cc: linux-kernel@vger.kernel.org; linux...@kvack.org
Subject: Re: [PATCH 1/1] mm/migrate: fix list corruption in migration of
non-LRU movable pages
Do
Do not top post please
On Wed 04-09-19 07:27:25, sunqiuyang wrote:
> isolate_migratepages_block() from another thread may try to isolate the page
> again:
>
> for (; low_pfn < end_pfn; low_pfn++) {
> /* ... */
> page = pfn_to_page(low_pfn);
> /* ... */
> if (!PageLRU(page)) {
> if
through this path?
From: Michal Hocko [mho...@kernel.org]
Sent: Wednesday, September 04, 2019 14:38
To: sunqiuyang
Cc: linux-kernel@vger.kernel.org; linux...@kvack.org
Subject: Re: [PATCH 1/1] mm/migrate: fix list corruption in migration of
non-LRU movable pages
On Wed 04-09-19 02:18:38,
On Wed 04-09-19 02:18:38, sunqiuyang wrote:
> The isolate path of non-lru movable pages:
>
> isolate_migratepages_block
> isolate_movable_page
> trylock_page
> // if PageIsolated, goto out_no_isolated
> a_ops->isolate_page
>
sunqiuyang
Cc: linux-kernel@vger.kernel.org; linux...@kvack.org
Subject: Re: [PATCH 1/1] mm/migrate: fix list corruption in migration of
non-LRU movable pages
On Tue 03-09-19 16:27:46, sunqiuyang wrote:
> From: Qiuyang Sun
>
> Currently, after a page is migrated, it
> 1) has its
On Tue 03-09-19 16:27:46, sunqiuyang wrote:
> From: Qiuyang Sun
>
> Currently, after a page is migrated, it
> 1) has its PG_isolated flag cleared in move_to_new_page(), and
> 2) is deleted from its LRU list (cc->migratepages) in unmap_and_move().
> However, between steps 1) and 2), the page
From: Qiuyang Sun
Currently, after a page is migrated, it
1) has its PG_isolated flag cleared in move_to_new_page(), and
2) is deleted from its LRU list (cc->migratepages) in unmap_and_move().
However, between steps 1) and 2), the page could be isolated by another
thread in
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