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    SubjectRe: [PATCH - 2.6.10] generic_file_buffered_write handle partial DIO writes with multiple iovecs
    On Wed, 2005-01-19 at 09:28, Sami Farin wrote:
    > On Wed, Jan 19, 2005 at 08:55:40AM -0800, Daniel McNeil wrote:
    > > On Tue, 2005-01-18 at 18:31, Sami Farin wrote:
    > ...
    > > > I have Linux 2.6.10-ac9 + bio clone memory corruption -patch,
    > > > and dio_bug does not give errors (without your patch).
    > >
    > > I should have mentioned that my testing was on ext3 with 4k
    > > block size. The bio clone patch might affect this by merging
    > > the i/o into a single iovec. Here's an updated test program
    > > that uses 2 different buffers allocated separately that might
    > > prevent the merging. See if this works on your system.
    > I have reiserfs... and this version does not give errors, either.

    Reisefs must handle allocations differently. The bug only
    shows up if there is an unallocated hole and a O_DIRECT write with
    multiple iovecs writes partially into the allocated space
    and completes at least 1 iovec worth of data and then finishes
    the i/o using buffer i/o to allocate space for the hole and write
    the remaining data.


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