• Ben Gamari's avatar
    rts: Ensure we always give MADV_DONTNEED a chance in osDecommitMemory · 6576bf83
    Ben Gamari authored
    As described in #12865, newer Linux kernels support both MADV_FREE and
    MADV_DONTNEED. Previously a runtime would fail to try MADV_DONTNEED if
    MADV_FREE failed (e.g. since the kernel which the image is running on
    doesn't support the latter). Now we try MADV_DONTNEED if MADV_FREE
    failed to ensure that binaries compiled on a kernel supporting MADV_FREE
    don't fail on decommit.
    
    Test Plan: Validate
    
    Reviewers: austin, erikd, simonmar
    
    Reviewed By: simonmar
    
    Subscribers: thomie
    
    Differential Revision: https://phabricator.haskell.org/D2780
    
    GHC Trac Issues: #12865
    6576bf83
OSMem.c 18.1 KB