lkml.org 
[lkml]   [2020]   [Aug]   [31]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    Date
    From
    SubjectRe: [GIT pull] sched/urgent for v5.9-rc2
    On Sun, Aug 30, 2020 at 11:54:19AM -0700, Linus Torvalds wrote:
    > On Sun, Aug 30, 2020 at 11:04 AM Thomas Gleixner <tglx@linutronix.de> wrote:
    > >
    > > - Make is_idle_task() __always_inline to prevent the compiler from putting
    > > it out of line into the wrong section because it's used inside noinstr
    > > sections.
    >
    > What completely broken compiler uninlined that single-instruction function?
    >
    > I've obviously pulled this, but it sounds like there should be a
    > compiler bug-report for this insane behavior.
    >
    > Or is Marco building the kernel without optimizations or something
    > like that? That has not been a supported model, for various good
    > reasons..

    I think that was Clang with KCSAN on, KCSAN obviously makes this
    function a little bigger with the instrumentation for the load(s). But
    yes...

    \
     
     \ /
      Last update: 2020-08-31 09:25    [W:4.275 / U:0.008 seconds]
    ©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site