Re: 2.6.19-rc1-mm1+ memory problem

From: Michael Raskin
Date: Fri Nov 24 2006 - 18:08:26 EST

Michael Raskin wrote:
Also I have uploaded contents of /proc/page_owner after loosing more than 100M. (220M used, 29M - on page_owner, lessthan 50M - for processes).

Top 3 entries:

89361 times:
Page allocated via order 0, mask 0x280d2
[0xc0159f31] __handle_mm_fault+1809
[0xc011318a] do_page_fault+314
[0xc04111c4] error_code+116
Can be anything. But if I understand anything, this memory is used because someone has requested a page that is swapped out. So the memory must be used, but not reflected in meminfo, and not by a process?

35560 times:
Page allocated via order 0, mask 0x201d2
[0xc0152ec2] __do_page_cache_readahead+450
[0xc015309a] do_page_cache_readahead+74
[0xc014d7b5] filemap_nopage+325
[0xc0159919] __handle_mm_fault+249
[0xc011318a] do_page_fault+314
[0xc04111c4] error_code+116
- is reflected in cache usage statistics, I guess..

6185 times:
Page allocated via order 0, mask 0x200d2
[0xc014e069] generic_file_buffered_write+329
[0xc014e814] __generic_file_aio_write_nolock+612
[0xc014eb85] generic_file_aio_write+85
[0xc01b26ff] ext3_file_write+63
[0xc016b23c] do_sync_write+204
[0xc016b9a7] vfs_write+167
[0xc016c2a7] sys_write+71
[0xc010303a] sysenter_past_esp+95
- negligible, really..
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