lkml.org 
[lkml]   [2006]   [Oct]   [30]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    SubjectRe: splice blocks indefinitely when len > 64k?
    From
    Date
    On Mon, 2006-10-30 at 14:11 -0500, Phillip Susi wrote:
    > While it should not simply hang, the splice size needs to be an even
    > multiple of the page size.

    I don't think that is true, at least on this level. Firstly, splice-cp
    does this:

    #define BS SPLICE_SIZE
    int this_len = min((off_t) BS, sb.st_size);
    int ret = splice(in_fd, NULL, pfds[1], NULL, this_len, 0);

    No considerations are made regarding page size.

    Secondly, the problem still exists when I increase SPLICE_SIZE to
    (128*1024)

    Daniel

    > Daniel Drake wrote:
    > > Hi,
    > >
    > > I'm experimenting with splice and have run into some unusual behaviour.
    > >
    > > I am using the utilities in git://brick.kernel.dk/data/git/splice.git
    > >
    > > In splice.h, when changing SPLICE_SIZE from:
    > >
    > > #define SPLICE_SIZE (64*1024)
    > >
    > > to
    > >
    > > #define SPLICE_SIZE ((64*1024)+1)
    > >
    > > splice-cp hangs indefinitely when copying files sized 65537 bytes or
    > > more. It hangs on the first splice() call.
    > >
    > > Is this a bug? I'd like to be able to copy much more than 64kb on a
    > > single splice call.
    > >
    > > Thanks!
    > > Daniel
    >

    -
    To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
    the body of a message to majordomo@vger.kernel.org
    More majordomo info at http://vger.kernel.org/majordomo-info.html
    Please read the FAQ at http://www.tux.org/lkml/

    \
     
     \ /
      Last update: 2006-10-30 20:35    [W:0.020 / U:1.708 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site