Re: Kernel falls apart under light memory pressure (i.e. linkingvmlinux)

[KOSAKI Motohiro]

> Right after that happened, I hit ctrl-c to kill test_mempressure.sh.
> The system was OK until I typed sync, and then everything hung.
>
> I'm really confused.  shrink_inactive_list in
> RECLAIM_MODE_LUMPYRECLAIM will call one of the isolate_pages functions
> with ISOLATE_BOTH.  The resulting list goes into shrink_page_list,
> which does VM_BUG_ON(PageActive(page)).
>
> How is that supposed to work?

Usually clear_active_flags() clear PG_active before calling shrink_page_list().

shrink_inactive_list()
    isolate_pages_global()
    update_isolated_counts()
        clear_active_flags()
    shrink_page_list()



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