Bug ID: 6430461 ufs_quiesce() involved in a 4-way deadlock

Bug ID	6430461
Synopsis	ufs_quiesce() involved in a 4-way deadlock
State	10-Fix Delivered (Fix available in build)
Category:Subcategory	kernel:ufs
Keywords	deadlock \| lockfs \| rtiq_reviewed \| sunalert-submit-availability \| ufs-cleanup \| ufs_quiesce \| ufs_triage
Responsible Engineer	Vidya Sakar
Reported Against
Duplicate Of
Introduced In	solaris_2.5.1
Commit to Fix	snv_82
Fixed In	snv_82
Release Fixed	solaris_nevada(snv_82) , solaris_10u6(s10u6_05) (Bug ID:2164269) solaris_9(s9patch) (Bug ID:2164809,) solaris_8(s8patch) (Bug ID:2164810,)
Related Bugs	6436644 , 6497074 , 6510075 , 4339897
Submit Date	25-May-2006
Last Update Date	31-January-2008
Description	See comments This is a file system hang/deadlock problem caused by simulataneous file system operations such as map, brk, pagefault in the presence of a file system quiescing operation (caused by lockfs, fssnap commands etc) The cyclic dependency is * ufs_map() thread waits for brk() thread to be complete * brk() thread is waiting for pagefault thread * pagefault() thread is waiting for the file system quiesce thread * quiesce thread is waiting for the ufs_map() thread
Work Around	N/A
Comments	N/A

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