1. 04 Jul, 2019 3 commits
  2. 02 Jul, 2019 10 commits
    • Kirill Smelkov's avatar
      . · f801e574
      Kirill Smelkov authored
      f801e574
    • Kirill Smelkov's avatar
      X make sure tests don't get stuck even if wcfs gets killed -9 ... · 661b871f
      Kirill Smelkov authored
      ... and is still stuck in kernel waiting for FUSE request it sent to
      self (mkrevfile) to complete. For example:
      
      	==================
      	WARNING: DATA RACE
      	Write at 0x00c00009a2a0 by goroutine 17:
      	  github.com/hanwen/go-fuse/fuse/nodefs.(*portableHandleMap).Register()
      	      /home/kirr/src/neo/src/github.com/hanwen/go-fuse/fuse/nodefs/handle.go:87 +0x130
      	  github.com/hanwen/go-fuse/fuse/nodefs.(*FileSystemConnector).lookupUpdate()
      	      /home/kirr/src/neo/src/github.com/hanwen/go-fuse/fuse/nodefs/fsconnector.go:126 +0x65
      	  github.com/hanwen/go-fuse/fuse/nodefs.(*rawBridge).Lookup()
      	      /home/kirr/src/neo/src/github.com/hanwen/go-fuse/fuse/nodefs/fsops.go:119 +0x203
      	  github.com/hanwen/go-fuse/fuse.doLookup()
      	      /home/kirr/src/neo/src/github.com/hanwen/go-fuse/fuse/opcode.go:335 +0x16e
      	  github.com/hanwen/go-fuse/fuse.(*Server).handleRequest()
      	      /home/kirr/src/neo/src/github.com/hanwen/go-fuse/fuse/server.go:470 +0x868
      	  github.com/hanwen/go-fuse/fuse.(*Server).loop()
      	      /home/kirr/src/neo/src/github.com/hanwen/go-fuse/fuse/server.go:437 +0x1de
      
      	Previous read at 0x00c00009a2a0 by goroutine 44:
      	  main.(*Root).mkrevfile()
      	      /home/kirr/src/neo/src/github.com/hanwen/go-fuse/fuse/nodefs/inode.go:66 +0x476
      	  main.(*BigFile).invalidateBlk.func1()
      	      /home/kirr/src/wendelin/wendelin.core/wcfs/wcfs.go:980 +0x1b0
      	  main.(*BigFile).invalidateBlk()
      	      /home/kirr/src/wendelin/wendelin.core/wcfs/wcfs.go:990 +0x33f
      	  main.(*Root).handleδZ.func3()
      	      /home/kirr/src/wendelin/wendelin.core/wcfs/wcfs.go:811 +0x8a
      	  golang.org/x/sync/errgroup.(*Group).Go.func1()
      	      /home/kirr/src/tools/go/g.env/src/golang.org/x/sync/errgroup/errgroup.go:57 +0x64
      
      	Goroutine 17 (running) created at:
      	  github.com/hanwen/go-fuse/fuse.(*Server).readRequest()
      	      /home/kirr/src/neo/src/github.com/hanwen/go-fuse/fuse/server.go:304 +0x5d3
      	  github.com/hanwen/go-fuse/fuse.(*Server).loop()
      	      /home/kirr/src/neo/src/github.com/hanwen/go-fuse/fuse/server.go:415 +0x78
      	  github.com/hanwen/go-fuse/fuse.(*Server).Serve()
      	      /home/kirr/src/neo/src/github.com/hanwen/go-fuse/fuse/server.go:360 +0x7d
      	  main._main.func2()
      	      /home/kirr/src/wendelin/wendelin.core/wcfs/wcfs.go:2292 +0x52
      
      	Goroutine 44 (running) created at:
      	  golang.org/x/sync/errgroup.(*Group).Go()
      	      /home/kirr/src/tools/go/g.env/src/golang.org/x/sync/errgroup/errgroup.go:54 +0x73
      	  main.(*Root).handleδZ()
      	      /home/kirr/src/wendelin/wendelin.core/wcfs/wcfs.go:810 +0x47d
      	  main.(*Root).zwatcher()
      	      /home/kirr/src/wendelin/wendelin.core/wcfs/wcfs.go:731 +0x32b
      	  main._main()
      	      /home/kirr/src/wendelin/wendelin.core/wcfs/wcfs.go:2303 +0x21d1
      	  main.main()
      	      /home/kirr/src/wendelin/wendelin.core/wcfs/wcfs.go:2114 +0x89
      	==================
      
      	C: test timed out after 7.0s -> aborting wcfs fuse connection to unblock
      	Traceback (most recent call last):
      	  File "/home/kirr/src/tools/go/pygolang/golang/__init__.py", line 122, in _
      	    return f(*argv, **kw)
      	  File "/home/kirr/src/wendelin/wendelin.core/wcfs/wcfs_test.py", line 289, in close
      	    tf.close()
      	  File "/home/kirr/src/wendelin/wendelin.core/wcfs/wcfs_test.py", line 505, in close
      	    t.f.close()
      	IOError: [Errno 107] Transport endpoint is not connected
      	Traceback (most recent call last):
      	  File "/home/kirr/src/tools/go/pygolang/golang/__init__.py", line 122, in _
      	    return f(*argv, **kw)
      	  File "/home/kirr/src/wendelin/wendelin.core/wcfs/wcfs_test.py", line 1284, in test_wcfs_basic
      	    at2 = t.commit(zf, {2:'c2', 3:'d2', 5:'f2'})
      	  File "/home/kirr/src/wendelin/wendelin.core/wcfs/wcfs_test.py", line 376, in commit
      	    t._wcsync()
      	  File "/home/kirr/src/wendelin/wendelin.core/wcfs/wcfs_test.py", line 382, in _wcsync
      	    l = t._wc_zheadfh.readline()
      	IOError: [Errno 103] Software caused connection abort
      
      before the patch after data race reporting on wcfs.go side and wcfs.go
      aborting (we set GORACE="halt_on_error") the test was still stuck and
      one wcfs thread was still alive:
      
      	├─py.test,58 /home/kirr/src/wendelin/venv/z-dev/bin/py.test -p no:cacheprovider -vsx -k test_wcfs_basic
      	│   └─(wcfs,67)
      	│       └─{wcfs},82
      
      with 67 being already killed - zombie - and 82 received the same signal
      but being alive waiting in kernel for answer to a FUSE request:
      
      	# cat /proc/82/stack
      	[<0>] request_wait_answer+0x206/0x23d
      	[<0>] __fuse_request_send+0x5d/0x80
      	[<0>] fuse_simple_request+0xc8/0x180
      	[<0>] fuse_lookup_name+0xfa/0x200
      	[<0>] fuse_lookup+0x4a/0x110
      	[<0>] fuse_atomic_open+0xa8/0x100
      	[<0>] path_openat+0xbe2/0x12a0
      	[<0>] do_filp_open+0x8e/0x100
      	[<0>] do_sys_open+0x181/0x220
      	[<0>] do_syscall_64+0x59/0x35b
      	[<0>] entry_SYSCALL_64_after_hwframe+0x44/0xa9
      	[<0>] 0xffffffffffffffff
      
      and manual `kill -9 82` not making any effect, because after
      git.kernel.org/linus/a131de0a482a request_wait_answer even after,
      receiving fatal signal, waits for request to be answered.
      
      It was explicitly said in that kernel commit that the way to unblock
      such deadlocks is /sys/fs/fuse/connection/<X>/abort - so we do it this
      way on timeout to make sure a test is never stuck forever.
      661b871f
    • Kirill Smelkov's avatar
      . · 61b2a2f5
      Kirill Smelkov authored
      61b2a2f5
    • Kirill Smelkov's avatar
      . · f7396071
      Kirill Smelkov authored
      f7396071
    • Kirill Smelkov's avatar
      . · 658a3316
      Kirill Smelkov authored
      658a3316
    • Kirill Smelkov's avatar
      . · e785a581
      Kirill Smelkov authored
      e785a581
    • Kirill Smelkov's avatar
      . · 8538a5c1
      Kirill Smelkov authored
      8538a5c1
    • Kirill Smelkov's avatar
      . · abae5f95
      Kirill Smelkov authored
      abae5f95
    • Kirill Smelkov's avatar
      . · 547ca215
      Kirill Smelkov authored
      547ca215
    • Kirill Smelkov's avatar
      . · 0d679efa
      Kirill Smelkov authored
      0d679efa
  3. 01 Jul, 2019 21 commits
  4. 30 Jun, 2019 5 commits
  5. 27 Jun, 2019 1 commit