strace on redis hang (last lines)

2494438 440345048 [main] redis-server 5908 fhandler_base::lseek: setting file pointer to 0
   42 440345090 [main] redis-server 5908 lseek64: 0 = lseek (3, 0, 0)
 4208 440349298 [main] redis-server 5908 writev: writev (3, 0x22C714, 1)
   40 440349338 [main] redis-server 5908 fhandler_base::write: binary write
  216 440349554 [main] redis-server 5908 writev: 315 = write (3, 0x22C714, 1), errno 0
  227 440349781 [main] redis-server 5908 fhandler_base::lseek: setting file pointer to 0
   31 440349812 [main] redis-server 5908 lseek64: 0 = lseek (3, 0, 1)
2465430 442815242 [main] redis-server 5908 fhandler_base::lseek: setting file pointer to 0
   45 442815287 [main] redis-server 5908 lseek64: 0 = lseek (3, 0, 0)
 2525 442817812 [main] redis-server 5908 writev: writev (3, 0x22C714, 1)
   35 442817847 [main] redis-server 5908 fhandler_base::write: binary write
   28 442817875 [main] redis-server 5908 writev: 143 = write (3, 0x22C714, 1), errno 0
   68 442817943 [main] redis-server 5908 fhandler_base::lseek: setting file pointer to 0
   26 442817969 [main] redis-server 5908 lseek64: 0 = lseek (3, 0, 1)
2472877 445290846 [main] redis-server 5908 fhandler_base::lseek: setting file pointer to 0
   44 445290890 [main] redis-server 5908 lseek64: 0 = lseek (3, 0, 0)
 2283 445293173 [main] redis-server 5908 writev: writev (3, 0x22C714, 1)
   33 445293206 [main] redis-server 5908 fhandler_base::write: binary write
   28 445293234 [main] redis-server 5908 writev: 144 = write (3, 0x22C714, 1), errno 0
   71 445293305 [main] redis-server 5908 fhandler_base::lseek: setting file pointer to 0
   24 445293329 [main] redis-server 5908 lseek64: 0 = lseek (3, 0, 1)
2484289 447777618 [main] redis-server 5908 fhandler_base::lseek: setting file pointer to 0
   45 447777663 [main] redis-server 5908 lseek64: 0 = lseek (3, 0, 0)
 2232 447779895 [main] redis-server 5908 writev: writev (3, 0x22C714, 1)
   34 447779929 [main] redis-server 5908 fhandler_base::write: binary write
   85 447780014 [main] redis-server 5908 writev: 144 = write (3, 0x22C714, 1), errno 0
   68 447780082 [main] redis-server 5908 fhandler_base::lseek: setting file pointer to 0
   25 447780107 [main] redis-server 5908 lseek64: 0 = lseek (3, 0, 1)
2477443 450257550 [main] redis-server 5908 fhandler_base::lseek: setting file pointer to 0
   45 450257595 [main] redis-server 5908 lseek64: 0 = lseek (3, 0, 0)
 2334 450259929 [main] redis-server 5908 writev: writev (3, 0x22C714, 1)
   37 450259966 [main] redis-server 5908 fhandler_base::write: binary write
   29 450259995 [main] redis-server 5908 writev: 143 = write (3, 0x22C714, 1), errno 0
   72 450260067 [main] redis-server 5908 fhandler_base::lseek: setting file pointer to 0
   24 450260091 [main] redis-server 5908 lseek64: 0 = lseek (3, 0, 1)
2465983 452726074 [main] redis-server 5908 fhandler_base::lseek: setting file pointer to 0
   41 452726115 [main] redis-server 5908 lseek64: 0 = lseek (3, 0, 0)
 2425 452728540 [main] redis-server 5908 writev: writev (3, 0x22C714, 1)
   36 452728576 [main] redis-server 5908 fhandler_base::write: binary write
   27 452728603 [main] redis-server 5908 writev: 144 = write (3, 0x22C714, 1), errno 0
   70 452728673 [main] redis-server 5908 fhandler_base::lseek: setting file pointer to 0
   25 452728698 [main] redis-server 5908 lseek64: 0 = lseek (3, 0, 1)
2469990 455198688 [main] redis-server 5908 fhandler_base::lseek: setting file pointer to 0
   47 455198735 [main] redis-server 5908 lseek64: 0 = lseek (3, 0, 0)
 2178 455200913 [main] redis-server 5908 writev: writev (3, 0x22C714, 1)
   34 455200947 [main] redis-server 5908 fhandler_base::write: binary write
   26 455200973 [main] redis-server 5908 writev: 142 = write (3, 0x22C714, 1), errno 0
   68 455201041 [main] redis-server 5908 fhandler_base::lseek: setting file pointer to 0
   31 455201072 [main] redis-server 5908 lseek64: 0 = lseek (3, 0, 1)
2478078 457679150 [main] redis-server 5908 fhandler_base::lseek: setting file pointer to 0
   40 457679190 [main] redis-server 5908 lseek64: 0 = lseek (3, 0, 0)
 2236 457681426 [main] redis-server 5908 writev: writev (3, 0x22C714, 1)
   34 457681460 [main] redis-server 5908 fhandler_base::write: binary write
   28 457681488 [main] redis-server 5908 writev: 143 = write (3, 0x22C714, 1), errno 0
   67 457681555 [main] redis-server 5908 fhandler_base::lseek: setting file pointer to 0
   26 457681581 [main] redis-server 5908 lseek64: 0 = lseek (3, 0, 1)
2481087 460162668 [main] redis-server 5908 fhandler_base::lseek: setting file pointer to 0
   45 460162713 [main] redis-server 5908 lseek64: 0 = lseek (3, 0, 0)
 2167 460164880 [main] redis-server 5908 writev: writev (3, 0x22C714, 1)
   34 460164914 [main] redis-server 5908 fhandler_base::write: binary write
   38 460164952 [main] redis-server 5908 writev: 144 = write (3, 0x22C714, 1), errno 0
  151 460165103 [main] redis-server 5908 fhandler_base::lseek: setting file pointer to 0
   25 460165128 [main] redis-server 5908 lseek64: 0 = lseek (3, 0, 1)
2476388 462641516 [main] redis-server 5908 fhandler_base::lseek: setting file pointer to 0
   42 462641558 [main] redis-server 5908 lseek64: 0 = lseek (3, 0, 0)
 2215 462643773 [main] redis-server 5908 writev: writev (3, 0x22C714, 1)
   35 462643808 [main] redis-server 5908 fhandler_base::write: binary write
   28 462643836 [main] redis-server 5908 writev: 142 = write (3, 0x22C714, 1), errno 0
   66 462643902 [main] redis-server 5908 fhandler_base::lseek: setting file pointer to 0
   24 462643926 [main] redis-server 5908 lseek64: 0 = lseek (3, 0, 1)
2488836 465132762 [main] redis-server 5908 fhandler_base::lseek: setting file pointer to 0
   99 465132861 [main] redis-server 5908 lseek64: 0 = lseek (3, 0, 0)
 1894 465134755 [main] redis-server 5908 writev: writev (3, 0x22C714, 1)
   29 465134784 [main] redis-server 5908 fhandler_base::write: binary write
   23 465134807 [main] redis-server 5908 writev: 143 = write (3, 0x22C714, 1), errno 0
   60 465134867 [main] redis-server 5908 fhandler_base::lseek: setting file pointer to 0
   21 465134888 [main] redis-server 5908 lseek64: 0 = lseek (3, 0, 1)
2492075 467626963 [main] redis-server 5908 fhandler_base::lseek: setting file pointer to 0
   43 467627006 [main] redis-server 5908 lseek64: 0 = lseek (3, 0, 0)
 2264 467629270 [main] redis-server 5908 writev: writev (3, 0x22C714, 1)
   33 467629303 [main] redis-server 5908 fhandler_base::write: binary write
   28 467629331 [main] redis-server 5908 writev: 143 = write (3, 0x22C714, 1), errno 0
   66 467629397 [main] redis-server 5908 fhandler_base::lseek: setting file pointer to 0
   25 467629422 [main] redis-server 5908 lseek64: 0 = lseek (3, 0, 1)
2466902 470096324 [main] redis-server 5908 fhandler_base::lseek: setting file pointer to 0
   45 470096369 [main] redis-server 5908 lseek64: 0 = lseek (3, 0, 0)
 2249 470098618 [main] redis-server 5908 writev: writev (3, 0x22C714, 1)
   35 470098653 [main] redis-server 5908 fhandler_base::write: binary write
   27 470098680 [main] redis-server 5908 writev: 144 = write (3, 0x22C714, 1), errno 0
  198 470098878 [main] redis-server 5908 fhandler_base::lseek: setting file pointer to 0
   35 470098913 [main] redis-server 5908 lseek64: 0 = lseek (3, 0, 1)
2791694 472890607 [main] redis-server 5908 fhandler_base::lseek: setting file pointer to 0
  219 472890826 [main] redis-server 5908 lseek64: 0 = lseek (3, 0, 0)
 5232 472896058 [main] redis-server 5908 writev: writev (3, 0x22C714, 1)
   47 472896105 [main] redis-server 5908 fhandler_base::write: binary write
   25 472896130 [main] redis-server 5908 writev: 99 = write (3, 0x22C714, 1), errno 0
   59 472896189 [main] redis-server 5908 fhandler_base::lseek: setting file pointer to 0
   22 472896211 [main] redis-server 5908 lseek64: 0 = lseek (3, 0, 1)
2637328 475533539 [main] redis-server 5908 fhandler_base::lseek: setting file pointer to 0
   45 475533584 [main] redis-server 5908 lseek64: 0 = lseek (3, 0, 0)
 2237 475535821 [main] redis-server 5908 writev: writev (3, 0x22C714, 1)
   34 475535855 [main] redis-server 5908 fhandler_base::write: binary write
   28 475535883 [main] redis-server 5908 writev: 186 = write (3, 0x22C714, 1), errno 0
   67 475535950 [main] redis-server 5908 fhandler_base::lseek: setting file pointer to 0
   26 475535976 [main] redis-server 5908 lseek64: 0 = lseek (3, 0, 1)
2574166 478110142 [main] redis-server 5908 fhandler_base::lseek: setting file pointer to 0
   44 478110186 [main] redis-server 5908 lseek64: 0 = lseek (3, 0, 0)
 6626 478116812 [main] redis-server 5908 writev: writev (3, 0x22C714, 1)
  231 478117043 [main] redis-server 5908 fhandler_base::write: binary write
  216 478117259 [main] redis-server 5908 writev: 143 = write (3, 0x22C714, 1), errno 0
  260 478117519 [main] redis-server 5908 fhandler_base::lseek: setting file pointer to 0
   25 478117544 [main] redis-server 5908 lseek64: 0 = lseek (3, 0, 1)
2602220 480719764 [main] redis-server 5908 fhandler_base::lseek: setting file pointer to 0
   42 480719806 [main] redis-server 5908 lseek64: 0 = lseek (3, 0, 0)
 2276 480722082 [main] redis-server 5908 writev: writev (3, 0x22C714, 1)
   34 480722116 [main] redis-server 5908 fhandler_base::write: binary write
   28 480722144 [main] redis-server 5908 writev: 143 = write (3, 0x22C714, 1), errno 0
   69 480722213 [main] redis-server 5908 fhandler_base::lseek: setting file pointer to 0
   25 480722238 [main] redis-server 5908 lseek64: 0 = lseek (3, 0, 1)
2533366 483255604 [main] redis-server 5908 fhandler_base::lseek: setting file pointer to 0
   45 483255649 [main] redis-server 5908 lseek64: 0 = lseek (3, 0, 0)
 2146 483257795 [main] redis-server 5908 writev: writev (3, 0x22C714, 1)
   32 483257827 [main] redis-server 5908 fhandler_base::write: binary write
   28 483257855 [main] redis-server 5908 writev: 144 = write (3, 0x22C714, 1), errno 0
   66 483257921 [main] redis-server 5908 fhandler_base::lseek: setting file pointer to 0
   25 483257946 [main] redis-server 5908 lseek64: 0 = lseek (3, 0, 1)
2466810 485724756 [main] redis-server 5908 fhandler_base::lseek: setting file pointer to 0
   39 485724795 [main] redis-server 5908 lseek64: 0 = lseek (3, 0, 0)
 1847 485726642 [main] redis-server 5908 writev: writev (3, 0x22C714, 1)
   31 485726673 [main] redis-server 5908 fhandler_base::write: binary write
   25 485726698 [main] redis-server 5908 writev: 144 = write (3, 0x22C714, 1), errno 0
   57 485726755 [main] redis-server 5908 fhandler_base::lseek: setting file pointer to 0
   24 485726779 [main] redis-server 5908 lseek64: 0 = lseek (3, 0, 1)
2467763 488194542 [main] redis-server 5908 fhandler_base::lseek: setting file pointer to 0
   42 488194584 [main] redis-server 5908 lseek64: 0 = lseek (3, 0, 0)
 2105 488196689 [main] redis-server 5908 writev: writev (3, 0x22C714, 1)
   33 488196722 [main] redis-server 5908 fhandler_base::write: binary write
   27 488196749 [main] redis-server 5908 writev: 144 = write (3, 0x22C714, 1), errno 0
   67 488196816 [main] redis-server 5908 fhandler_base::lseek: setting file pointer to 0
   87 488196903 [main] redis-server 5908 lseek64: 0 = lseek (3, 0, 1)
2461173 490658076 [main] redis-server 5908 fhandler_base::lseek: setting file pointer to 0
   39 490658115 [main] redis-server 5908 lseek64: 0 = lseek (3, 0, 0)
 1858 490659973 [main] redis-server 5908 writev: writev (3, 0x22C714, 1)
   39 490660012 [main] redis-server 5908 fhandler_base::write: binary write
   24 490660036 [main] redis-server 5908 writev: 143 = write (3, 0x22C714, 1), errno 0
  211 490660247 [main] redis-server 5908 fhandler_base::lseek: setting file pointer to 0
   61 490660308 [main] redis-server 5908 lseek64: 0 = lseek (3, 0, 1)
2485608 493145916 [main] redis-server 5908 fhandler_base::lseek: setting file pointer to 0
   50 493145966 [main] redis-server 5908 lseek64: 0 = lseek (3, 0, 0)
 2289 493148255 [main] redis-server 5908 writev: writev (3, 0x22C714, 1)
   38 493148293 [main] redis-server 5908 fhandler_base::write: binary write
   24 493148317 [main] redis-server 5908 writev: 143 = write (3, 0x22C714, 1), errno 0
   62 493148379 [main] redis-server 5908 fhandler_base::lseek: setting file pointer to 0
   26 493148405 [main] redis-server 5908 lseek64: 0 = lseek (3, 0, 1)
2512641 495661046 [main] redis-server 5908 fhandler_base::lseek: setting file pointer to 0
   43 495661089 [main] redis-server 5908 lseek64: 0 = lseek (3, 0, 0)
 2311 495663400 [main] redis-server 5908 writev: writev (3, 0x22C714, 1)
   34 495663434 [main] redis-server 5908 fhandler_base::write: binary write
   30 495663464 [main] redis-server 5908 writev: 143 = write (3, 0x22C714, 1), errno 0
   72 495663536 [main] redis-server 5908 fhandler_base::lseek: setting file pointer to 0
   24 495663560 [main] redis-server 5908 lseek64: 0 = lseek (3, 0, 1)
2481270 498144830 [main] redis-server 5908 fhandler_base::lseek: setting file pointer to 0
   40 498144870 [main] redis-server 5908 lseek64: 0 = lseek (3, 0, 0)
 2178 498147048 [main] redis-server 5908 writev: writev (3, 0x22C714, 1)
   48 498147096 [main] redis-server 5908 fhandler_base::write: binary write
   28 498147124 [main] redis-server 5908 writev: 98 = write (3, 0x22C714, 1), errno 0
   67 498147191 [main] redis-server 5908 fhandler_base::lseek: setting file pointer to 0
   25 498147216 [main] redis-server 5908 lseek64: 0 = lseek (3, 0, 1)
2477845 500625061 [main] redis-server 5908 fhandler_base::lseek: setting file pointer to 0
   44 500625105 [main] redis-server 5908 lseek64: 0 = lseek (3, 0, 0)
 2270 500627375 [main] redis-server 5908 writev: writev (3, 0x22C714, 1)
   32 500627407 [main] redis-server 5908 fhandler_base::write: binary write
   27 500627434 [main] redis-server 5908 writev: 142 = write (3, 0x22C714, 1), errno 0
   67 500627501 [main] redis-server 5908 fhandler_base::lseek: setting file pointer to 0
   25 500627526 [main] redis-server 5908 lseek64: 0 = lseek (3, 0, 1)
2462791 503090317 [main] redis-server 5908 fhandler_base::lseek: setting file pointer to 0
   54 503090371 [main] redis-server 5908 lseek64: 0 = lseek (3, 0, 0)
 2525 503092896 [main] redis-server 5908 writev: writev (3, 0x22C714, 1)
   96 503092992 [main] redis-server 5908 fhandler_base::write: binary write
   35 503093027 [main] redis-server 5908 writev: 144 = write (3, 0x22C714, 1), errno 0
  138 503093165 [main] redis-server 5908 fhandler_base::lseek: setting file pointer to 0
   39 503093204 [main] redis-server 5908 lseek64: 0 = lseek (3, 0, 1)
2477555 505570759 [main] redis-server 5908 fhandler_base::lseek: setting file pointer to 0
   45 505570804 [main] redis-server 5908 lseek64: 0 = lseek (3, 0, 0)
 2180 505572984 [main] redis-server 5908 writev: writev (3, 0x22C714, 1)
   34 505573018 [main] redis-server 5908 fhandler_base::write: binary write
   27 505573045 [main] redis-server 5908 writev: 143 = write (3, 0x22C714, 1), errno 0
   69 505573114 [main] redis-server 5908 fhandler_base::lseek: setting file pointer to 0
   25 505573139 [main] redis-server 5908 lseek64: 0 = lseek (3, 0, 1)
2459846 508032985 [main] redis-server 5908 fhandler_base::lseek: setting file pointer to 0
   39 508033024 [main] redis-server 5908 lseek64: 0 = lseek (3, 0, 0)
 2161 508035185 [main] redis-server 5908 writev: writev (3, 0x22C714, 1)
   32 508035217 [main] redis-server 5908 fhandler_base::write: binary write
   28 508035245 [main] redis-server 5908 writev: 143 = write (3, 0x22C714, 1), errno 0
   70 508035315 [main] redis-server 5908 fhandler_base::lseek: setting file pointer to 0
   23 508035338 [main] redis-server 5908 lseek64: 0 = lseek (3, 0, 1)
2468869 510504207 [main] redis-server 5908 fhandler_base::lseek: setting file pointer to 0
   45 510504252 [main] redis-server 5908 lseek64: 0 = lseek (3, 0, 0)
 5197 510509449 [main] redis-server 5908 writev: writev (3, 0x22C714, 1)
   47 510509496 [main] redis-server 5908 fhandler_base::write: binary write
  186 510509682 [main] redis-server 5908 writev: 143 = write (3, 0x22C714, 1), errno 0
   71 510509753 [main] redis-server 5908 fhandler_base::lseek: setting file pointer to 0
   26 510509779 [main] redis-server 5908 lseek64: 0 = lseek (3, 0, 1)
2486819 512996598 [main] redis-server 5908 fhandler_base::lseek: setting file pointer to 0
   45 512996643 [main] redis-server 5908 lseek64: 0 = lseek (3, 0, 0)
 2257 512998900 [main] redis-server 5908 writev: writev (3, 0x22C714, 1)
   36 512998936 [main] redis-server 5908 fhandler_base::write: binary write
  102 512999038 [main] redis-server 5908 writev: 143 = write (3, 0x22C714, 1), errno 0
   80 512999118 [main] redis-server 5908 fhandler_base::lseek: setting file pointer to 0
   29 512999147 [main] redis-server 5908 lseek64: 0 = lseek (3, 0, 1)
2482949 515482096 [main] redis-server 5908 fhandler_base::lseek: setting file pointer to 0
   42 515482138 [main] redis-server 5908 lseek64: 0 = lseek (3, 0, 0)
 2192 515484330 [main] redis-server 5908 writev: writev (3, 0x22C714, 1)
   34 515484364 [main] redis-server 5908 fhandler_base::write: binary write
   27 515484391 [main] redis-server 5908 writev: 187 = write (3, 0x22C714, 1), errno 0
   86 515484477 [main] redis-server 5908 fhandler_base::lseek: setting file pointer to 0
   28 515484505 [main] redis-server 5908 lseek64: 0 = lseek (3, 0, 1)
2469937 517954442 [main] redis-server 5908 fhandler_base::lseek: setting file pointer to 0
   44 517954486 [main] redis-server 5908 lseek64: 0 = lseek (3, 0, 0)
 2285 517956771 [main] redis-server 5908 writev: writev (3, 0x22C714, 1)
   36 517956807 [main] redis-server 5908 fhandler_base::write: binary write
   29 517956836 [main] redis-server 5908 writev: 144 = write (3, 0x22C714, 1), errno 0
   79 517956915 [main] redis-server 5908 fhandler_base::lseek: setting file pointer to 0
   25 517956940 [main] redis-server 5908 lseek64: 0 = lseek (3, 0, 1)