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    Subject[PATCH 1/3] Add fadvise interface wrapper
    Date
    With recent discussion on the LKML[1], it seems likely that Linux will
    finally support posix_fadvise in a useful way with the FADV_DONTNEED
    flag. This should allow us to minimize the effect of rsync on the
    system's working set. Add the necessary wrapper to syscall.c.

    [1] http://lkml.org/lkml/2010/11/21/59
    ---
    syscall.c | 11 +++++++++++
    1 files changed, 11 insertions(+), 0 deletions(-)

    diff --git a/syscall.c b/syscall.c
    index cfabc3e..9f5b1c3 100644
    --- a/syscall.c
    +++ b/syscall.c
    @@ -28,6 +28,7 @@
    #ifdef HAVE_SYS_ATTR_H
    #include <sys/attr.h>
    #endif
    +#include <fcntl.h>

    extern int dry_run;
    extern int am_root;
    @@ -282,3 +283,13 @@ OFF_T do_lseek(int fd, OFF_T offset, int whence)
    return lseek(fd, offset, whence);
    #endif
    }
    +
    +#if _XOPEN_SOURCE >= 600
    +int do_fadvise(int fd, OFF_T offset, OFF_T len, int advise)
    +{
    + return posix_fadvise(fd, offset, len, advise);
    +}
    +#else
    +#define do_fadvise()
    +#endif
    +
    --
    1.7.1


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