Bug 858790
| Summary: | Thread limit hit less than that defined by ulimit -u | ||||||
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| Product: | Red Hat Enterprise Linux 6 | Reporter: | Everett Bennett <everett.bennett> | ||||
| Component: | kernel | Assignee: | Jerome Marchand <jmarchan> | ||||
| Status: | CLOSED INSUFFICIENT_DATA | QA Contact: | Red Hat Kernel QE team <kernel-qe> | ||||
| Severity: | low | Docs Contact: | |||||
| Priority: | unspecified | ||||||
| Version: | 6.3 | CC: | anton, everett.bennett, luke2261-2017 | ||||
| Target Milestone: | rc | ||||||
| Target Release: | --- | ||||||
| Hardware: | x86_64 | ||||||
| OS: | Linux | ||||||
| Whiteboard: | |||||||
| Fixed In Version: | Doc Type: | Bug Fix | |||||
| Doc Text: | Story Points: | --- | |||||
| Clone Of: | Environment: | ||||||
| Last Closed: | 2014-02-02 14:28:33 UTC | Type: | Bug | ||||
| Regression: | --- | Mount Type: | --- | ||||
| Documentation: | --- | CRM: | |||||
| Verified Versions: | Category: | --- | |||||
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |||||
| Cloudforms Team: | --- | Target Upstream Version: | |||||
| Embargoed: | |||||||
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This request was not resolved in time for the current release. Red Hat invites you to ask your support representative to propose this request, if still desired, for consideration in the next release of Red Hat Enterprise Linux. (In reply to Everett Bennett from comment #0) > - ulimit -u = 65536 [...] > - kernel.threads-max = 1048576 [...] > Actual results: > > - 31490 > > Expected results: > > - 41000 Why do you expect 41000? I don't see where that number comes from. pthread_create() could also fail for the lack of a limited ressource or because an other limit is exceeded. For instance the max number of mapping (/proc/sys/vm/max_map_count) could be exceeded. Could you also run strace on your program to see what syscall (clone, mmap...) fails and how (EAGAIN, ENOMEM)? Please close this ticket. I provided all the info I had at the time. I have nothing to add to this ticket. |
Created attachment 614484 [details] thread_limit.c Description of problem: I see this errno when testing limits of thread creation: Thread creation failed after 31490 threads, errno=11 I have the following settings: - ulimit -u = 65536 - spanned pages = 4382719 cat /proc/zoneinfo|grep spanned|awk '{a=a+$2 } END {print a}' 4382719 - MemTotal: 16211752 kB - kernel.threads-max = 1048576 - Defined in /etc/pam.d/login: session required pam_limits.so Version-Release number of selected component (if applicable): How reproducible: Steps to Reproduce: 1. Use /tmp/thread_limit.c 2. 3. Actual results: - 31490 Expected results: - 41000 Additional info: See attached test program.