On Tue, Sep 15, 2015 at 01:28:13PM +0300, Kirill A. Shutemov wrote:
> Hugh has pointed that compound_head() call can be unsafe in some
> context. There's one example:
>
> CPU0CPU1
>
> isolate_migratepages_block()
> page_count()
> compound_head()
>
Hugh has pointed that compound_head() call can be unsafe in some
context. There's one example:
CPU0CPU1
isolate_migratepages_block()
page_count()
compound_head()
!!PageTail() == true
put_page()
Hugh has pointed that compound_head() call can be unsafe in some
context. There's one example:
CPU0CPU1
isolate_migratepages_block()
page_count()
compound_head()
!!PageTail() == true
put_page()
On Tue, Sep 15, 2015 at 01:28:13PM +0300, Kirill A. Shutemov wrote:
> Hugh has pointed that compound_head() call can be unsafe in some
> context. There's one example:
>
> CPU0CPU1
>
> isolate_migratepages_block()
> page_count()
> compound_head()
>
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