[lkml]   [2009]   [Feb]   [27]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
    SubjectRe: [PATCH RFC] x86: add brk allocation for very, very early allocations
    H. Peter Anvin wrote:
    > That would make sense. init_memory_mapping() needs to know what not to
    > step on, and that would include the brk at this stage. For 64-bit mode,
    > Xen is the only user of !PSE, and so may be particularly vulnerable to
    > this issue (because of massively larger direct mapping tables.)


    > This reminds me... is your intent that the BRK is permanent (unless
    > explicitly freed on a page by page basis) or part of the init memory
    > that is flushed?

    Permanent. I'm using it to allocate things which are the moral
    equivalent of the kernel pagetables.


     \ /
      Last update: 2009-02-27 22:23    [W:0.022 / U:5.496 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site