Messages in this thread | | | Date | Mon, 25 Feb 2008 19:53:20 +0100 | From | Jörn Engel <> | Subject | Re: Page scan keeps touching kernel text pages |
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On Mon, 25 February 2008 09:48:22 -0800, Dave Hansen wrote: > On Mon, 2008-02-25 at 15:07 +0000, Andy Whitcroft wrote: > > shrink_page_list() would be expected to be passed pages pulled from > > the active or inactive lists via isolate_lru_pages()? I would not have > > expected to find the kernel text on the LRU and therefore not expect to > > see it passed to shrink_page_list()? > > It may have been kernel text at one time, but what about __init > functions? Don't we free that section back to the normal allocator > after init time? Those can end up on the LRU.
Pages below 0x2ba should be non-init in my test kernel: c02ba000 T __init_begin ... c02d5000 B __init_end
scanning zone DMA page 3fa 3 00000000 628 page 2bf 2 00000000 628 page 97 3 00000000 628 page 98 2 00000000 628
So __init explains one page of this minimal sample, but not the other three.
Jörn
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