Messages in this thread | | | Date | Mon, 28 Apr 2008 15:14:08 +0200 | From | Ingo Molnar <> | Subject | Re: [PATCH] x86_64 vDSO: use initdata |
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* Roland McGrath <roland@redhat.com> wrote:
> The 64-bit vDSO image is in a special ".vdso" section for no reason I > can determine. Furthermore, the location of the vdso_end symbol > includes some wrongly-calculated padding space in the image, which is > then (correctly) rounded to page size, resulting in an extra page of > zeros in the image mapped in to user processes. > > This changes it to put the vdso.so image into normal initdata as we > have always done for the 32-bit vDSO images. The extra padding is > gone, so the user VMA is one page instead of two. The image that was > already copied around at boot time is now in initdata, so we recover > that wasted space after boot.
thanks Roland, applied. I suspect this will need a few days of test-time as we change the user-space vma layout. (not in material ways though)
Ingo
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