Closed Bug 113740 Opened 23 years ago Closed 23 years ago

Spinlock-based PR_Stack* can cause hang on Solaris

Categories

(NSPR :: NSPR, defect, P1)

Product:
NSPR
Component:
NSPR
Version:
4.1.2
Platform:
Sun
Solaris
Type:
defect

Tracking

(Not tracked)

Status:
RESOLVED FIXED

People

(Reporter: ruslan, Assigned: wtc)

Details

Attachments

(2 files, 1 obsolete file)

Proposed patch for NSPRPUB_RELEASE_4_1_BRANCH.
3.19 KB, patch
Details | Diff | Splinter Review
Proposed patch for the tip.
1.39 KB, patch
Details | Diff | Splinter Review 
Spinlock-based implementation of PR_StackPop/Push can cause a hang on Solaris. 
When thread that is holding a lock gets descheduled via SIGLWP and goes into 
do_preempt - all other threads trying to access the stack are left in a spinning 
state. For some unknown reason Solaris doesn't seem to give the CPU back to the 
owner of the lock. This is not a priority inversion problem.
Attached patch Proposed patch. (obsolete) — — Splinter Review 
Ruslan, please review this patch.
I added a reference to this bug in the comment.
Attachment #60667 - Attachment is obsolete: true

    
    

    
  
Fixed on the NSPRPUB_RELEASE_4_1_BRANCH, NSPRPUB_PRE_4_2_CLIENT_BRANCH,
and the main trunk of NSPR.
Status: NEW → RESOLVED
Closed: 23 years ago
Priority: -- → P1
Resolution: --- → FIXED
Target Milestone: --- → 4.1.3

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