On Thu, 2004-09-23 at 15:52, John-Mark Gurney wrote: > Sean McNeil wrote this message on Thu, Sep 23, 2004 at 15:20 -0700: > > Is anyone willing to work with me to help trace down this problem? It > > has been outstanding for a long time and I would dearly like it fixed. > > I'm willing to help in any capacity to trace down the culprit. > > > > To recap, on the re0 device (possibly others) running -current on an > > amd64 processor there are times when udp packets get improper checksum > > calculations with txcsum set for the interface. This causes a deadlock > > in nfs as the client just contunuously requests this packet and it is > > rejected because of the checksum being bad. > > I have recently been working with the re driver, so I'm somewhat familar > with the driver. I haven't seen any issues, but I also don't have an > AMD64 system to test with. > > Have you tried to find out if it is packet size related? are you > trying to use jumbo frames? rwatson committed netsend to the src/tools > tree that could help this, and I have attached udpcheck.py which is > a client/server script to test/verify packet sizes of difference > sizes. My method of testing has been to just do an "ls -lR" from a large directory structure. With txcsum set, it consistently locks up. This is on clients ranging from x86 linux, BSD, a sparc solaris2, and an hppa HPUX machine. If I turn off txcsum (i.e. ifconfig re0 -txcsum) I have never had any problems. I tried your program with txcsum and it just hangs. Without txcsum, I'm not sure what the output here means, but this is what I got: [sean_at_office mahi]$ python ~/Desktop/Downloads/udpcheck.py server 1234 packet send mismatch at: 1792 packet send mismatch at: 1793 packet send mismatch at: 1794 packet send mismatch at: 1795 packet send mismatch at: 1796 packet send mismatch at: 1797 packet send mismatch at: 1798 packet send mismatch at: 1799 packet send mismatch at: 1800 packet send mismatch at: 1801 packet send mismatch at: 1802 packet send mismatch at: 1803 packet send mismatch at: 1804 packet send mismatch at: 1805 packet send mismatch at: 1806 packet send mismatch at: 1807 packet send mismatch at: 1808 packet send mismatch at: 1809 packet send mismatch at: 1810 packet send mismatch at: 1811 packet send mismatch at: 1812 packet send mismatch at: 1813 packet send mismatch at: 1814 packet send mismatch at: 1815 packet send mismatch at: 1816 packet send mismatch at: 1817 packet send mismatch at: 1818 packet send mismatch at: 1819 packet send mismatch at: 1820 packet send mismatch at: 1821 packet send mismatch at: 1822 packet send mismatch at: 1823 packet send mismatch at: 1824 packet send mismatch at: 1825 packet send mismatch at: 1826 packet send mismatch at: 1827 packet send mismatch at: 1828 packet send mismatch at: 1829 packet send mismatch at: 1830 packet send mismatch at: 1831 packet send mismatch at: 1832 packet send mismatch at: 1833 packet send mismatch at: 1834 packet send mismatch at: 1835 packet send mismatch at: 1836 packet send mismatch at: 1837 packet send mismatch at: 1838 packet send mismatch at: 1839 packet send mismatch at: 1840 packet send mismatch at: 1841 packet send mismatch at: 1842 packet send mismatch at: 1843 packet send mismatch at: 1844 packet send mismatch at: 1845 packet send mismatch at: 1846 packet send mismatch at: 1847 packet send mismatch at: 1848 packet send mismatch at: 1849 packet send mismatch at: 1850 packet send mismatch at: 1851 packet send mismatch at: 1852 packet send mismatch at: 1853 packet send mismatch at: 1854 packet send mismatch at: 1855 packet send mismatch at: 1856 packet send mismatch at: 1857 packet send mismatch at: 1858 packet send mismatch at: 1859 packet send mismatch at: 1860 packet send mismatch at: 1861 packet send mismatch at: 1862 packet send mismatch at: 1863 packet send mismatch at: 1864 packet send mismatch at: 1865 packet send mismatch at: 1866 packet send mismatch at: 1867 packet send mismatch at: 1868 packet send mismatch at: 1869 packet send mismatch at: 1870 packet send mismatch at: 1871 packet send mismatch at: 1872 packet send mismatch at: 1873 packet send mismatch at: 1874 packet send mismatch at: 1875 packet send mismatch at: 1876 packet send mismatch at: 1877 packet send mismatch at: 1878 packet send mismatch at: 1879 packet send mismatch at: 1880 packet send mismatch at: 1881 packet send mismatch at: 1882 packet send mismatch at: 1883 packet send mismatch at: 1884 packet send mismatch at: 1885 packet send mismatch at: 1886 packet send mismatch at: 1887 packet send mismatch at: 1888 packet send mismatch at: 1889 packet send mismatch at: 1890 packet send mismatch at: 1891 packet send mismatch at: 1892 packet send mismatch at: 1893 packet send mismatch at: 1894 packet send mismatch at: 1895 packet send mismatch at: 1896 packet send mismatch at: 1897 packet send mismatch at: 1898 packet send mismatch at: 1899 packet send mismatch at: 1900 packet send mismatch at: 1901 packet send mismatch at: 1902 packet send mismatch at: 1903 packet send mismatch at: 1904 packet send mismatch at: 1905 packet send mismatch at: 1906 packet send mismatch at: 1907 packet send mismatch at: 1908 packet send mismatch at: 1909 packet send mismatch at: 1910 packet send mismatch at: 1911 packet send mismatch at: 1912 packet send mismatch at: 1913 packet send mismatch at: 1914 packet send mismatch at: 1915 packet send mismatch at: 1916 packet send mismatch at: 1917 packet send mismatch at: 1918 packet send mismatch at: 1919 packet send mismatch at: 1920 packet send mismatch at: 1921 packet send mismatch at: 1922 packet send mismatch at: 1923 packet send mismatch at: 1924 packet send mismatch at: 1925 packet send mismatch at: 1926 packet send mismatch at: 1927 packet send mismatch at: 1928 packet send mismatch at: 1929 packet send mismatch at: 1930 packet send mismatch at: 1931 packet send mismatch at: 1932 packet send mismatch at: 1933 packet send mismatch at: 1934 packet send mismatch at: 1935 packet send mismatch at: 1936 packet send mismatch at: 1937 packet send mismatch at: 1938 packet send mismatch at: 1939 packet send mismatch at: 1940 packet send mismatch at: 1941 packet send mismatch at: 1942 packet send mismatch at: 1943 packet send mismatch at: 1944 packet send mismatch at: 1945 packet send mismatch at: 1946 packet send mismatch at: 1947 packet send mismatch at: 1948 packet send mismatch at: 1949 packet send mismatch at: 1950 packet send mismatch at: 1951 packet send mismatch at: 1952 packet send mismatch at: 1953 packet send mismatch at: 1954 packet send mismatch at: 1955 packet send mismatch at: 1956 packet send mismatch at: 1957 packet send mismatch at: 1958 packet send mismatch at: 1959 packet send mismatch at: 1960 packet send mismatch at: 1961 packet send mismatch at: 1962 packet send mismatch at: 1963 packet send mismatch at: 1964 packet send mismatch at: 1965 packet send mismatch at: 1966 packet send mismatch at: 1967 packet send mismatch at: 1968 packet send mismatch at: 1969 packet send mismatch at: 1970 packet send mismatch at: 1971 packet send mismatch at: 1972 packet send mismatch at: 1973 packet send mismatch at: 1974 packet send mismatch at: 1975 packet send mismatch at: 1976 packet send mismatch at: 1977 packet send mismatch at: 1978 packet send mismatch at: 1979 packet send mismatch at: 1980 packet send mismatch at: 1981 packet send mismatch at: 1982 packet send mismatch at: 1983 packet send mismatch at: 1984 packet send mismatch at: 1985 packet send mismatch at: 1986 packet send mismatch at: 1987 packet send mismatch at: 1988 packet send mismatch at: 1989 packet send mismatch at: 1990 packet send mismatch at: 1991 packet send mismatch at: 1992 packet send mismatch at: 1993 packet send mismatch at: 1994 packet send mismatch at: 1995 packet send mismatch at: 1996 packet send mismatch at: 1997 packet send mismatch at: 1998 packet send mismatch at: 1999 packet send mismatch at: 2000 packet send mismatch at: 2001 packet send mismatch at: 2002 packet send mismatch at: 2003 packet send mismatch at: 2004 packet send mismatch at: 2005 packet send mismatch at: 2006 packet send mismatch at: 2007 packet send mismatch at: 2008 packet send mismatch at: 2009 packet send mismatch at: 2010 packet send mismatch at: 2011 packet send mismatch at: 2012 packet send mismatch at: 2013 packet send mismatch at: 2014 packet send mismatch at: 2015 packet send mismatch at: 2016 packet send mismatch at: 2017 packet send mismatch at: 2018 packet send mismatch at: 2019 packet send mismatch at: 2020 packet send mismatch at: 2021 packet send mismatch at: 2022 packet send mismatch at: 2023 packet send mismatch at: 2024 packet send mismatch at: 2025 packet send mismatch at: 2026 packet send mismatch at: 2027 packet send mismatch at: 2028 packet send mismatch at: 2029 packet send mismatch at: 2030 packet send mismatch at: 2031 packet send mismatch at: 2032 packet send mismatch at: 2033 packet send mismatch at: 2034 packet send mismatch at: 2035 packet send mismatch at: 2036 packet send mismatch at: 2037 packet send mismatch at: 2038 packet send mismatch at: 2039 packet send mismatch at: 2040 packet send mismatch at: 2041 packet send mismatch at: 2042 packet send mismatch at: 2043 packet send mismatch at: 2044 packet send mismatch at: 2045 packet send mismatch at: 2046 packet send mismatch at: 2047 [('r', 1792), ('r', 1793), ('r', 1794), ('r', 1795), ('r', 1796), ('r', 1797), ('r', 1798), ('r', 1799), ('r', 1800), ('r', 1801), ('r', 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