{"action":"created","issue":{"url":"https://api.github.com/repos/mozilla/rr/issues/281","labels_url":"https://api.github.com/repos/mozilla/rr/issues/281/labels{/name}","comments_url":"https://api.github.com/repos/mozilla/rr/issues/281/comments","events_url":"https://api.github.com/repos/mozilla/rr/issues/281/events","html_url":"https://github.com/mozilla/rr/issues/281","id":17438505,"number":281,"title":"Buffer ANONYMOUS mmap calls","user":{"login":"cgjones","id":325916,"avatar_url":"https://avatars.githubusercontent.com/u/325916?v=3","gravatar_id":"","url":"https://api.github.com/users/cgjones","html_url":"https://github.com/cgjones","followers_url":"https://api.github.com/users/cgjones/followers","following_url":"https://api.github.com/users/cgjones/following{/other_user}","gists_url":"https://api.github.com/users/cgjones/gists{/gist_id}","starred_url":"https://api.github.com/users/cgjones/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/cgjones/subscriptions","organizations_url":"https://api.github.com/users/cgjones/orgs","repos_url":"https://api.github.com/users/cgjones/repos","events_url":"https://api.github.com/users/cgjones/events{/privacy}","received_events_url":"https://api.github.com/users/cgjones/received_events","type":"User","site_admin":false},"labels":[],"state":"closed","locked":false,"assignee":null,"milestone":null,"comments":2,"created_at":"2013-07-31T07:48:31Z","updated_at":"2015-03-06T00:06:40Z","closed_at":"2015-03-06T00:06:40Z","body":"FF creates a *lot* of mmaps around startup.  A lot of these are the bajillion little dso's that get mapped in from gtk gunk, which we'll probably want to keep processing in the rr process, but there are a bunch that aren't generating copy-to-trace activity from rr and are presumably MAP_ANON maps.  And those, in turn, are presumably mainly from jemalloc.\r\n\r\nI can't think of a reason why we can't buffer those calls (if we're careful in replay)."},"comment":{"url":"https://api.github.com/repos/mozilla/rr/issues/comments/77480376","html_url":"https://github.com/mozilla/rr/issues/281#issuecomment-77480376","issue_url":"https://api.github.com/repos/mozilla/rr/issues/281","id":77480376,"user":{"login":"cgjones","id":325916,"avatar_url":"https://avatars.githubusercontent.com/u/325916?v=3","gravatar_id":"","url":"https://api.github.com/users/cgjones","html_url":"https://github.com/cgjones","followers_url":"https://api.github.com/users/cgjones/followers","following_url":"https://api.github.com/users/cgjones/following{/other_user}","gists_url":"https://api.github.com/users/cgjones/gists{/gist_id}","starred_url":"https://api.github.com/users/cgjones/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/cgjones/subscriptions","organizations_url":"https://api.github.com/users/cgjones/orgs","repos_url":"https://api.github.com/users/cgjones/repos","events_url":"https://api.github.com/users/cgjones/events{/privacy}","received_events_url":"https://api.github.com/users/cgjones/received_events","type":"User","site_admin":false},"created_at":"2015-03-06T00:06:40Z","updated_at":"2015-03-06T00:06:40Z","body":"I don't think this is a very good idea anymore, unless new profiling data says it's really urgent.  rr is much faster now than when this was filed."}}