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While multithreading can be good for performance, this\npattern and the memory footprint for process launch and\ndependencies can turn the memory footprint for a cirros image\nconversion (16MB) into 1.2GB of memory being asked for by the\nqemu-img tool.\n\nIn order to limit this impact, as the default number of arenas\nis governed by the number of CPUs times the number 8, it seems\nreasonable to lower this to a more reasonable number which\nalso helps keep our possible memory footprint from being exceeded.\n\nNOTE: This change is largely different than the original change\nas an intermediate change converted write_image.sh to python.\nAs it is unlikely for us to backport the intermediate change,\nit is logical for us to just modify the original script.\nOtherwise the release note is ultimately what is backported for\nrelease note tooling continutity.\n\nChange-Id: I71a28ec59ec31c691205eb34d9fcab63a2ccb682\nStory: 2008928\nTask: 42528\n(cherry picked from commit 9e4c7052a2fd9aac03858db696bf1ea9487f15e6)\n(cherry picked from commit 9c20cca36284a2a17aa535bef92c828096c7d926)\n(cherry picked from commit ee8118423b88f61ed58b0420356ceaed2fa53a40)\n(cherry picked from commit bc849e2f68fd40fe76515293e4157e94ebd5bf7b)\n","web_links":[{"name":"gitea","tooltip":"Open in GitWeb","url":"https://opendev.org/openstack/ironic-python-agent/commit/028681d66fd2ef2b1b81036f1ac628ef20376e2d"}],"resolve_conflicts_web_links":[{"name":"gitea","tooltip":"Open in GitWeb","url":"https://opendev.org/openstack/ironic-python-agent/commit/028681d66fd2ef2b1b81036f1ac628ef20376e2d"}]},"branch":"refs/heads/stable/train"}},"requirements":[],"submit_records":[{"status":"CLOSED","labels":[{"label":"Verified","status":"OK","applied_by":{"_account_id":22348,"name":"Zuul","username":"zuul","tags":["SERVICE_USER"]}},{"label":"Code-Review","status":"OK","applied_by":{"_account_id":15519,"name":"Iury Gregory Melo Ferreira","display_name":"Iury Gregory","email":"iurygregory@gmail.com","username":"iurygregory"}},{"label":"Workflow","status":"OK","applied_by":{"_account_id":15519,"name":"Iury Gregory Melo Ferreira","display_name":"Iury Gregory","email":"iurygregory@gmail.com","username":"iurygregory"}},{"label":"Backport-Candidate","status":"MAY"}]}],"submit_requirements":[{"name":"Verified","status":"SATISFIED","is_legacy":true,"submittability_expression_result":{"expression":"label:Verified\u003dCustom-Rule","fulfilled":true,"status":"PASS","passing_atoms":["label:Verified\u003dCustom-Rule"],"failing_atoms":[],"atom_explanations":{}}},{"name":"Workflow","status":"SATISFIED","is_legacy":true,"submittability_expression_result":{"expression":"label:Workflow\u003dCustom-Rule","fulfilled":true,"status":"PASS","passing_atoms":["label:Workflow\u003dCustom-Rule"],"failing_atoms":[],"atom_explanations":{}}},{"name":"Code-Review","status":"SATISFIED","is_legacy":true,"submittability_expression_result":{"expression":"label:Code-Review\u003dCustom-Rule","fulfilled":true,"status":"PASS","passing_atoms":["label:Code-Review\u003dCustom-Rule"],"failing_atoms":[],"atom_explanations":{}}}]}