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[[!tag open_issue_gnumach]]

[[!toc]]


# IRC, freenode, #hurd, 2011-08-31

    <antrik> braunr: do you have any idea what could cause the paging errors
      long before swap is exhausted?
    <braunr> antrik: not really, but i know every project based on the mach vm
      have rewritten their swap pager
    <antrik> (and also I/O performance steadily dropping before that point is
      reached?)

[[performance/degradation]], [[ext2fs_page_cache_swapping_leak]].

    <antrik> hm
    <braunr> there could too many things
    <antrik> perhaps we could "borrow" from one of them? :-)
    <braunr> map entry fragmentation for example
    <braunr> the freebsd one is the only possible candidate
    <braunr> uvm is too different
    <braunr> dragonflybsd maybe, but it's very close to freebsd
    <braunr> i didn't look at darwin/xnu


# [[trust_the_behavior_of_translators]]


# IRC, freenode, #hurd, 2013-10-30

    <braunr> it also seems that the kernel has trouble resuming processes that
      have been swapped out