[lkml]   [2006]   [Oct]   [12]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
    SubjectRe: 2.6.19-rc1-mm1 - locks when using "dd bs=1M" from card reader
    On Thu, 12 Oct 2006 14:18:04 +0200
    Helge Hafting <> wrote:

    > I found an easy way to hang the kernel when copying a SD-card:
    > dd if=/dev/sdc of=file bs=1048576
    > I.e. copy the entire 256MB card in 1MB chunks. I got about
    > 160MB before the kernel hung. Not even sysrq+B worked, I needed
    > the reset button. The pc has a total of 512MB memory if that matters.
    > Using bs=4096 instead let me copy the entire card with no problems,
    > but that seems to progress slower.
    > The above 'dd' command hangs my office pc every time. So I can repeat
    > it for debugging purposes.

    What device driver is providing /dev/sdc?

    Did any previous kernels work correctly? If so, which?
    To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
    the body of a message to
    More majordomo info at
    Please read the FAQ at

     \ /
      Last update: 2006-10-12 20:33    [W:0.026 / U:2.180 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site