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Diffstat (limited to 'open_issues/ext2fs_page_cache_swapping_leak.mdwn')
| -rw-r--r-- | open_issues/ext2fs_page_cache_swapping_leak.mdwn | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/open_issues/ext2fs_page_cache_swapping_leak.mdwn b/open_issues/ext2fs_page_cache_swapping_leak.mdwn index 607c3af4..c0d0867b 100644 --- a/open_issues/ext2fs_page_cache_swapping_leak.mdwn +++ b/open_issues/ext2fs_page_cache_swapping_leak.mdwn @@ -149,3 +149,27 @@ IRC, freenode, #hurd, 2011-04-18 <antrik> this make testing this stuff quite a lot harder... [sigh] <antrik> any suggestions how to debug this hang? <braunr> antrik: no :/ + +2011-04-28: [[!taglink open_issue_documentation]] + + <antrik> hm... is it normal that "swap free" doesn't increase as a process' + memory is paged back in? + <youpi> yes + <youpi> there's no real use cleaning swap + <youpi> on the contrary, it makes paging the process out again longer + <antrik> hm... so essentially, after swapping back and forth a bit, a part + of the swap equal to the size of physical RAM will be occupied with stuff + that is actually in RAM? + <youpi> yes + <youpi> so that that RAM can be freed immediately if needed + <antrik> hm... that means my effective swap size is only like 300 MB... no + wonder I see crashes under load + <antrik> err... make that 230 actually + <antrik> indeed, quitting the application freed both the physical RAM and + swap space + <braunr> 02:28 < antrik> hm... is it normal that "swap free" doesn't + increase as a process' memory is paged back in? + <braunr> swap is the backing store of anonymous memory, like ext2fs is the + backing store of memory objects created from its pager + <braunr> so you can view swap as the file system for everything that isn't + an external memory object |