[Bug 1249] New: use O_DIRECT open file, when read will hang.

[Martin J. Bligh]

http://bugme.osdl.org/show_bug.cgi?id=1249

           Summary: use O_DIRECT open file, when read will hang.
    Kernel Version: 2.6.0-test5-mm2
            Status: NEW
          Severity: normal
             Owner: bugme-janitors@xxxxxxxxxxxxxx
         Submitter: hugang@xxxxxxxxxxxx


Steps to reproduce:

rm -f /tmp/1.log
touch /tmp/1.log
echo << EOF > /tmp/hang.c 
# include <sys/types.h>
# include <asm/fcntl.h>

main()
{
        int i;
        char buf[1025];

        i = open("/tmp/1.log", O_RDONLY | 040000, 0);
        if ( i != -1) {
                read(i, buf, 1);
        }
        printf("'%s'", buf);
}
EOF
gcc -o /tmp/hang /tmp/hang.c
/tmp/hang


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