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SubjectRe: [PATCH 0/3] make mapped executable pages the first class citizen
On Tue, Jun 23, 2009 at 10:43:57PM +0800, David Howells wrote:
> Wu Fengguang <fengguang.wu@intel.com> wrote:
>
> > David, could you try running this when it occurred again?
> >
> > make Documentation/vm/page-types
> > Documentation/vm/page-types --raw # run as root
>
> Okay. I managed to catch it between the first and second OOMs, and ran the
> command you asked for.

Thank you!

> 0x0000000000000000 142261 555 ________________________________
> 0x0000000000000400 6797 26 __________B_____________________ buddy

The buddy+free numbers are pretty high. 26MB PG_buddy pages means much
more actual free pages. So I bet the 555MB no-flag pages are mostly free pages.

Thanks,
Fengguang

> David
> ---
> flags page-count MB symbolic-flags long-symbolic-flags
> 0x0000000000000000 142261 555 ________________________________
> 0x0000000100000000 5588 21 ____________________r___________ reserved
> 0x0000004000000000 17 0 __________________________h_____ arch
> 0x0000000800000004 4 0 __R____________________P________ referenced,private
> 0x0000000800000024 2073 8 __R__l_________________P________ referenced,lru,private
> 0x0000000400000028 69911 273 ___U_l________________d_________ uptodate,lru,mappedtodisk
> 0x0001000400000028 16 0 ___U_l________________d_____I___ uptodate,lru,mappedtodisk,readahead
> 0x0000000800000028 25 0 ___U_l_________________P________ uptodate,lru,private
> 0x0000000000000028 11 0 ___U_l__________________________ uptodate,lru
> 0x000000040000002c 3045 11 __RU_l________________d_________ referenced,uptodate,lru,mappedtodisk
> 0x000000080000002c 4 0 __RU_l_________________P________ referenced,uptodate,lru,private
> 0x0000000800000034 9 0 __R_Dl_________________P________ referenced,dirty,lru,private
> 0x0000000800000038 1 0 ___UDl_________________P________ uptodate,dirty,lru,private
> 0x0000000000004038 13 0 ___UDl________b_________________ uptodate,dirty,lru,swapbacked
> 0x000000080000003c 1 0 __RUDl_________________P________ referenced,uptodate,dirty,lru,private
> 0x0000000800000060 183 0 _____lA________________P________ lru,active,private
> 0x0000000800000064 982 3 __R__lA________________P________ referenced,lru,active,private
> 0x0000000400000068 473 1 ___U_lA_______________d_________ uptodate,lru,active,mappedtodisk
> 0x0000000c00000068 1 0 ___U_lA_______________dP________ uptodate,lru,active,mappedtodisk,private
> 0x000000040000006c 392 1 __RU_lA_______________d_________ referenced,uptodate,lru,active,mappedtodisk
> 0x0000000c0000006c 1 0 __RU_lA_______________dP________ referenced,uptodate,lru,active,mappedtodisk,private
> 0x0000000800000070 1 0 ____DlA________________P________ dirty,lru,active,private
> 0x0000000800000074 20 0 __R_DlA________________P________ referenced,dirty,lru,active,private
> 0x0000000c00000078 2 0 ___UDlA_______________dP________ uptodate,dirty,lru,active,mappedtodisk,private
> 0x0000000000004078 1 0 ___UDlA_______b_________________ uptodate,dirty,lru,active,swapbacked
> 0x000000080000007c 1 0 __RUDlA________________P________ referenced,uptodate,dirty,lru,active,private
> 0x0000000000000080 18684 72 _______S________________________ slab
> 0x0000000000000400 6797 26 __________B_____________________ buddy
> 0x0000000000000804 1 0 __R________M____________________ referenced,mmap
> 0x0000000400000828 195 0 ___U_l_____M__________d_________ uptodate,lru,mmap,mappedtodisk
> 0x000000040000082c 35 0 __RU_l_____M__________d_________ referenced,uptodate,lru,mmap,mappedtodisk
> 0x0000000000004838 2 0 ___UDl_____M__b_________________ uptodate,dirty,lru,mmap,swapbacked
> 0x0000000400000868 11 0 ___U_lA____M__________d_________ uptodate,lru,active,mmap,mappedtodisk
> 0x000000040000086c 274 1 __RU_lA____M__________d_________ referenced,uptodate,lru,active,mmap,mappedtodisk
> 0x0000000800000878 1 0 ___UDlA____M___________P________ uptodate,dirty,lru,active,mmap,private
> 0x000000080000087c 2 0 __RUDlA____M___________P________ referenced,uptodate,dirty,lru,active,mmap,private
> 0x0000000000005008 8 0 ___U________a_b_________________ uptodate,anonymous,swapbacked
> 0x0000000000005808 6 0 ___U_______Ma_b_________________ uptodate,mmap,anonymous,swapbacked
> 0x0000000000005828 4325 16 ___U_l_____Ma_b_________________ uptodate,lru,mmap,anonymous,swapbacked
> 0x0000000000005868 366 1 ___U_lA____Ma_b_________________ uptodate,lru,active,mmap,anonymous,swapbacked
> 0x000000000000586c 1 0 __RU_lA____Ma_b_________________ referenced,uptodate,lru,active,mmap,anonymous,swapbacked
> total 255744 999


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