Re: [PATCH -mm] vmscan: make mapped executable pages the first class citizen

KOSAKI Motohiro
2009-05-10T15:00:08Z

Hi

>> Secondly it moves the pressure from the storage volume holding the system
>> binaries and libraries to the swap device which already has to deal with
>> a lot of random (and thus expensive) I/O, as well as the users filestore
>> for mapped objects there - which may even be on a USB thumbdrive.
>
> Preserving the PROT_EXEC pages over streaming IO should not
> move much (if any) pressure from the file LRUs onto the
> swap-backed (anon) LRUs.

I don't think this is good example.
this issue is already solved by your patch. Thus this patch don't
improve streaming IO issue.