Re: [PATCH V2] mm: vmalloc: don't remove inexistent guard hole in remove_vm_area()
From: Andrey Ryabinin
Date: Thu Nov 12 2015 - 13:48:44 EST
2015-11-12 19:37 GMT+03:00 Jerome Marchand <jmarchan@xxxxxxxxxx>:
> Commit 71394fe50146 ("mm: vmalloc: add flag preventing guard hole
> allocation") missed a spot. Currently remove_vm_area() decreases
> vm->size to "remove" the guard hole page, even when it isn't present.
> All but one users just free the vm_struct rigth away and never access
> vm->size anyway.
> Don't touch the size in remove_vm_area() and have __vunmap() use the
> proper get_vm_area_size() helper.
> Signed-off-by: Jerome Marchand <jmarchan@xxxxxxxxxx>
Acked-by: Andrey Ryabinin <aryabinin@xxxxxxxxxxxxx>
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