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Thursday, June 11th, 2020

    Time Event
    1:19a
    [$] LWN.net Weekly Edition for June 11, 2020
    The LWN.net Weekly Edition for June 11, 2020 is available.
    1:19p
    Security updates for Thursday
    Security updates have been issued by CentOS (kernel and microcode_ctl), Debian (roundcube), Mageia (coturn, cups, libarchive, libvirt, libzypp, nghttp2, nrpe, openconnect, perl, python-typed-ast, ruby-rack, ruby-RubyGems, sudo, vino, wpa_supplicant, and xawtv), openSUSE (firefox, gnutls, GraphicsMagick, ucode-intel, and xawtv), Oracle (dotnet3.1 and kernel), Red Hat (curl, expat, file, gettext, kernel, kpatch-patch, libexif, pcs, python, tomcat, tomcat6, and unzip), Scientific Linux (kernel and microcode_ctl), SUSE (kernel), and Ubuntu (intel-microcode and sqlite3).
    1:46p
    Seven new stable kernels
    Greg Kroah-Hartman has announced the release of the 5.7.2, 5.6.18,
    5.4.46, 4.19.128, 4.14.184, 4.9.227, and 4.4.227 stable kernels. These contain
    mitigations
    for the special register buffer data
    sampling     (SRBDS) hardware vulnerability, as well as other fixes
    elsewhere in the trees. Users of those series should upgrade.
    7:38p
    [$] DMA-BUF cache handling: Off the DMA API map (part 2)
    Part 1 of this series, covered some
    background on ION, DMA-BUF heaps, the DMA API, and the concept of
    "ownership" when it comes to handling CPU-cache maintenance, finally ending
    on a conventional DMA API view of how DMA-BUF cache handling should be
    done. The article concluded with a discussion of why the traditional DMA
    APIs can perform poorly on contemporary systems. This article completes
    the series with an exploration of
    some of the approaches that DMA-BUF exporters can use to avoid
    unnecessary cache operations along with some rough proposals for how we
    might improve things.

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