lkml.org 
[lkml]   [1998]   [Feb]   [16]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    Date
    From
    Subjectmmaping problem in 2.0.32 with framegrabber
    Hi!

    I'm testing a framegrabber driver for the TekRam C210 framegrabber. The
    driver (for a ZR26120 chip) uses the bigphysarea patch to get a chunk of
    continuous physical memory. The program does something like:

    pScreen=(char*)mmap((caddr_t)0,FrameBufferSize,
    PROT_READ,MAP_FILE|MAP_SHARED,fd,(off_t)0);

    The program works ok and I can capture frames without problems. But when I
    finish grabbing and do a close(fd):

    Feb 15 05:33:57 multivac kernel: iput: inode 104123 on device 03:02 still
    has mappings.

    When I do exit(0):

    Feb 15 05:34:02 multivac kernel: Inode i_mmap ring corrupted
    Feb 15 05:34:02 multivac kernel: VFS: iput: trying to free free inode
    Feb 15 05:34:02 multivac kernel: VFS: device 3c:00, inode 104123,
    mode=00020660

    I have tried doing a munmap before closing the socket obtaining the same
    results.

    Any ideas?

    How can I get a chunk of continuous physical memory in kernels 2.1.xx?

    Regards,

    --
    __
    /\ \ [] Miguel Angel Vilariño Monreal [] 2:343/128.5@fidonet.org []
    \/ / [] mailto:mvil3274@alu-etsetb.upc.es [] 757:101/9.5@redbbs.org []
    / /\ [] mailto:mavilar@pangea.org [] l: 41º23.25' N []
    / /\ \ [] http://www.pangea.org/~mavilar [] L: 002º07.74' E []



    -
    To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
    the body of a message to majordomo@vger.rutgers.edu

    \
     
     \ /
      Last update: 2005-03-22 13:41    [W:0.023 / U:32.100 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site