09 Nov 2020

deadlock detection and recovery in operating system pdf

/Type /StructElem If no such i exists, go to step 4" Detection Algorithm (Cont.) Course Hero is not sponsored or endorsed by any college or university. /Pg 65 0 R << /K [ ] /Pg 63 0 R /K [ 135 ] << endobj /Pg 63 0 R /P 936 0 R 401 0 obj /P 529 0 R /S /P /P 91 0 R >> instances of resource type Rj." >> /Type /StructElem /S /Span /Pg 63 0 R /Type /StructElem /P 91 0 R /Type /StructElem /K [ 96 ] /Pg 63 0 R /Pg 3 0 R >> There are two deadlock detection methods depending upon the number of instances of each resource: 1. /P 783 0 R endobj /Pg 63 0 R /S /TD – Including deadlock prevention, detection and recovery , and deadlock avoidance. /K [ 120 ] /S /P /P 964 0 R /Pg 63 0 R >> 477 0 obj /S /P /Type /StructElem endobj 324 0 obj /S /P endobj 1076 0 obj 267 0 obj /P 889 0 R 569 0 obj << /Type /StructElem >> >> << << /K [ 52 ] << endobj /K [ 87 ] << << /K [ 82 ] endobj /S /TD << 1069 0 obj /S /P /Pg 63 0 R endobj /K [ 19 ] /Type /StructElem << /Pg 63 0 R >> endobj endobj << /Type /StructElem Chapter 7: Deadlocks! >> /K [ 698 0 R 699 0 R 700 0 R 701 0 R 702 0 R 704 0 R 706 0 R ] /P 514 0 R /P 91 0 R endobj /P 471 0 R /K [ 121 ] /Type /StructElem /Type /StructElem endobj endobj 287 0 obj /P 91 0 R >> /S /TD /Pg 3 0 R >> /Type /StructElem /Type /StructElem << << << /Pg 3 0 R 689 0 obj >> /P 1091 0 R endobj /Pg 61 0 R >> int I; /D [ 3 0 R /FitH 0 ] /S /P endobj /Type /StructElem /Type /StructElem /P 944 0 R –  Priority of the process. << >> << /K [ ] /K [ 205 ] /K [ 1 ] /K 60 /Pg 63 0 R /Type /StructElem /Pg 63 0 R 423 0 obj /S /TD 284 0 obj << << << /K [ 586 0 R ] /P 471 0 R /P 1063 0 R /Pg 61 0 R /Pg 63 0 R /Type /StructElem 736 0 obj /S /TD >> /Type /StructElem /S /P endobj /K [ 228 ] /Type /StructElem 182 0 obj 346 0 obj /K [ 124 0 R ] /K [ 149 0 R ] /S /P << /K [ 143 0 R ] /K [ 71 ] endobj endobj /P 904 0 R /Pg 63 0 R 319 0 R 319 0 R 320 0 R 321 0 R 322 0 R 323 0 R 323 0 R 323 0 R 323 0 R 323 0 R 323 0 R /Type /StructElem << >> /S /P >> /S /LBody /K [ 1072 0 R ] >> 684 0 obj >> /Type /StructElem /S /P endobj << << 148 0 obj >> endobj /K [ 1141 0 R ] /Type /StructElem /Type /StructElem /S /P /S /TD /Type /StructElem /Pg 63 0 R /K [ ] /P 91 0 R 336 0 obj << /K [ 28 ] /S /TD << endobj endobj /P 568 0 R /Type /StructElem /P 816 0 R /Pg 63 0 R /Pg 3 0 R /Type /StructElem /P 500 0 R 413 0 obj endobj endobj /S /P /Pg 37 0 R /S /P /S /TD /P 761 0 R /S /P >> 559 0 obj endobj /P 91 0 R 162 0 R 163 0 R 164 0 R 165 0 R 168 0 R 169 0 R 171 0 R 172 0 R 173 0 R 174 0 R 175 0 R /P 279 0 R 1078 0 obj /K [ 79 ] /Pg 37 0 R /Pg 3 0 R 134 0 obj /Type /StructElem 757 0 obj 1032 0 obj /S /TD /Type /StructElem endobj /S /Span /Type /StructElem endobj /K [ 74 ] /P 880 0 R /Type /StructElem >> /Pg 65 0 R /P 472 0 R /P 91 0 R endobj /S /Span /Pg 65 0 R •  one for each disjoint cycle
 1169 0 R 1170 0 R 1171 0 R 1172 0 R 1173 0 R 1174 0 R 1176 0 R ] /S /P /K [ 238 239 240 ] /K [ 116 ] /P 544 0 R /Type /StructElem << 0 0 2" << /Pg 65 0 R /K [ 87 ] 748 0 obj /Pg 63 0 R endobj endobj endobj >> /P 91 0 R endobj /K 117 /P 220 0 R /P 850 0 R 897 0 obj endobj /Type /StructElem /K [ 46 ] /P 761 0 R /S /P /S /TD /K [ 48 ] /Pg 63 0 R /Type /StructElem /P 826 0 R /P 833 0 R /K [ 173 ] endobj 1147 0 obj >> /P 91 0 R 986 0 obj /Endnote /Note /S /P 417 0 obj /Type /StructElem /S /TH /S /TD /Pg 65 0 R endobj /K [ 48 ] /K [ 20 ] endobj /Pg 61 0 R /Type /StructElem /S /P /P 471 0 R endobj /Pg 37 0 R /Pg 59 0 R 767 0 R 769 0 R 770 0 R 771 0 R 774 0 R 776 0 R 778 0 R 780 0 R 782 0 R 784 0 R 785 0 R /K [ 661 0 R ] /S /P /P 741 0 R /K [ 1085 0 R ] >> >> /K [ 13 ] /Type /StructElem 195 0 obj /Type /StructElem << endobj /K [ 92 0 R 95 0 R 96 0 R 97 0 R 99 0 R 100 0 R 102 0 R 103 0 R 104 0 R 105 0 R 106 0 R /P 91 0 R /S /TD /Pg 63 0 R endobj << /P 568 0 R /K 100 /P 91 0 R 319 0 obj /K [ 184 185 186 ] 420 0 obj /P 1060 0 R >> /S /P /Pg 63 0 R >> /Type /StructElem /K [ 624 0 R 625 0 R 626 0 R 627 0 R 628 0 R 630 0 R 632 0 R ] 434 0 R 435 0 R 436 0 R 437 0 R 438 0 R 439 0 R 440 0 R 441 0 R 442 0 R 443 0 R 444 0 R endobj /S /P endobj >> >> –  Can’t have a system administrator come in and decide which process to kill after deadlock has been detected. << >> /K [ 2 ] endobj 1003 0 obj /Type /StructElem /K [ 113 ] 653 0 obj 371 0 obj /P 741 0 R /S /TD /Pg 61 0 R >> /P 922 0 R /K [ ] /K [ 85 ] endobj << /Type /StructElem /K [ 718 0 R 720 0 R 722 0 R 724 0 R 726 0 R 728 0 R 730 0 R ] /Type /StructElem /P 707 0 R /P 1060 0 R /Type /StructElem >> /Pg 63 0 R /K [ 92 ] /Type /StructElem << 797 0 obj /Pg 63 0 R /P 1117 0 R endobj endobj /K 75 /Pg 63 0 R endobj << /K [ 53 ] /K [ 965 0 R 967 0 R 969 0 R 971 0 R 973 0 R 975 0 R 977 0 R ] endobj /QuickPDFF1c544f58 85 0 R /P 840 0 R 1021 0 obj endobj << >> Operating Systems Fall 2014 Deadlock Myungjin Lee [email protected] 1 . 1039 0 obj /S /P /P 964 0 R /Pg 63 0 R << endobj >> /K [ ] /Type /StructElem >> << /S /P >> /K 4 >> << << 911 0 obj /P 983 0 R /Type /StructElem 575 0 obj << >> 330 0 obj endobj /S /TD 453 0 obj >> endobj 1141 0 R 1143 0 R 1144 0 R 1147 0 R 1149 0 R 1151 0 R 1152 0 R 1153 0 R 1154 0 R /Pg 65 0 R >> /K [ ] /Type /StructElem /K 41 >> 194 0 obj " /P 91 0 R >> >> endobj << /P 91 0 R << /P 91 0 R /Type /StructElem 543 0 R 550 0 R 552 0 R 553 0 R 556 0 R 558 0 R 560 0 R 562 0 R 564 0 R 566 0 R 567 0 R /K [ ] /Type /StructElem /K [ ] /K [ 217 ] endobj endobj /P 840 0 R /P 91 0 R /Type /StructElem /Pg 63 0 R endobj /Pg 65 0 R /Type /StructElem /K 133 >> endobj /K [ ] endobj /S /Span /S /P /P 91 0 R /P 91 0 R /P 544 0 R /K [ 210 0 R ] /Type /StructElem << /K [ 1036 0 R ] /Pg 63 0 R >> >> /Pg 61 0 R /S /P /P 349 0 R 313 0 obj << /P 944 0 R << /K 59 /Type /StructElem /P 707 0 R /K [ ] /S /P << /Type /StructElem endobj /Pg 65 0 R << /P 274 0 R /K [ 280 0 R ] << /Pg 63 0 R /S /P /P 91 0 R /S /P /S /TR /P 643 0 R /K [ 1 ] /Pg 61 0 R endobj 381 0 obj /QuickPDFFecdbd944 24 0 R /P 751 0 R /P 578 0 R 995 0 obj 985 0 obj /S /P 1161 0 obj 281 0 obj /S /TR 825 0 R 828 0 R 830 0 R 832 0 R 834 0 R 836 0 R 838 0 R 839 0 R 846 0 R 848 0 R 849 0 R /Pg 63 0 R /Type /StructElem 115 0 obj endobj /S /P /Type /StructElem << 4 0 obj /S /Span /S /TR /Type /StructElem /S /TD 1037 0 obj >> /S /TD >> << << endobj /Pg 63 0 R 892 0 obj /Pg 3 0 R /S /P << /K [ 1131 0 R 1132 0 R 1134 0 R 1136 0 R ] /S /TD << /P 731 0 R /Type /Pages /K [ 617 0 R ] /K [ 56 ] /Type /StructElem >> >> /S /P endobj "Available" /K [ 118 0 R 119 0 R 121 0 R 123 0 R 125 0 R 126 0 R 128 0 R 129 0 R 131 0 R 132 0 R /K [ 80 ] endobj 434 0 obj /P 1130 0 R /Pg 3 0 R /P 91 0 R 740 0 obj >> /Type /StructElem /Type /StructElem 867 0 obj << allocated to each process.
 �+1�v{3ȧ�F3��c�:�[���� �֗�ΚO�(Fz� +|����>GpC�эZ�YS+�\���w0E �mw���Xɾ����` �2�c�_��V;t�~�"�-����5k���E << endobj /K [ ] >> /K [ 1126 0 R ] /Type /StructElem << Therefore the system considers that the deadlock will definitely occur. << >> >> /S /TD /Pg 61 0 R /Type /StructElem >> /K [ 51 ] /K [ ] Algorithm A (executed by each LP):! 1111 0 obj /S /P /K [ 70 ] >> /P 609 0 R 607 0 obj /S /TD << >> /Type /StructElem /K [ 32 ] /Type /StructElem /S /TD << /Pg 63 0 R /K [ 19 20 21 ] /P 117 0 R 730 0 obj /Type /StructElem /S /P /Type /StructElem /S /P 1070 0 obj /P 1042 0 R /Type /StructElem —  P1 and P2 each holds one disk drive and each /Pg 65 0 R 611 0 obj 450 0 obj /Type /StructElem /K [ 106 ] /S /TD /Pg 63 0 R << endobj /Type /StructElem endobj /P 266 0 R /Pg 63 0 R 1113 0 obj >> /Pg 37 0 R /Type /StructElem /Pg 61 0 R << >> 436 0 obj >> endobj /Type /StructElem /S /P << /S /P /K [ 44 ] /S /P 737 0 obj endobj >> /S /P /P 349 0 R /Type /StructElem /Pg 63 0 R 531 0 obj endobj /K [ 33 ] >> << endobj << endobj << /Pg 65 0 R 103 0 obj /K [ 267 0 R ] << endobj >> /Type /StructElem /Type /StructElem << /Type /Group << endobj /K [ 540 0 R ] stream >> /S /P << /P 786 0 R 592 0 obj endobj >> /K 66 /Type /StructElem /P 663 0 R /S /TD /P 91 0 R /P 91 0 R /Pg 63 0 R /Pg 63 0 R << >> >> /P 650 0 R /P 123 0 R /P 91 0 R /P 563 0 R endobj /Type /StructElem /S /LI 159 0 obj /P 1122 0 R /Type /StructElem /P 741 0 R 912 0 obj /K [ ] endobj /S /Span << 865 0 obj >> /Pg 63 0 R 327 0 obj /Type /StructElem /Pg 63 0 R /Pg 63 0 R >> /Type /StructElem endobj /Type /StructElem 443 0 obj /Pg 65 0 R 910 0 obj /P 604 0 R /S /Span /Type /StructElem /K 78 /K [ 83 ] /K [ ] /S /P /Type /StructElem /P 697 0 R << /K [ ] << << endobj >> /Pg 65 0 R >> /Type /StructElem /Type /StructElem /P 561 0 R endobj 952 0 obj /P 349 0 R /S /Textbox endobj 261 0 obj 254 0 obj /Type /StructElem /Type /StructElem /K [ 166 ] /P 967 0 R /P 235 0 R 466 0 obj endobj >> /S /TD /Pg 65 0 R /P 1008 0 R /Type /StructElem << /S /Textbox /P 578 0 R /Type /StructElem >> /K [ 15 ] /Pg 63 0 R /P 91 0 R /K [ ] >> 1137 0 obj /S /TD

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