From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Po Lu via "Bug reports for GNU Emacs, the Swiss army knife of text editors" Newsgroups: gmane.emacs.bugs Subject: bug#54698: non-recursive GC marking [PATCH] Date: Fri, 08 Apr 2022 13:49:18 +0800 Message-ID: <87pmlsw2e9.fsf@yahoo.com> References: <5A577100-75CE-4C9E-A7DA-02B917662AF5@acm.org> <8735itglid.fsf@gnus.org> <8527E407-8190-4574-B8D5-BE68220AE663@acm.org> <871qyc5o0y.fsf@yahoo.com> <5BBEDBDA-4C85-4237-9EF7-5635A4950365@acm.org> <83fsmreox8.fsf@gnu.org> <83a6czekro.fsf@gnu.org> <83r16acwar.fsf@gnu.org> <87tub6zabp.fsf@yahoo.com> Reply-To: Po Lu Mime-Version: 1.0 Content-Type: text/plain Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="24970"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/28.0.91 (gnu/linux) Cc: larsi@gnus.org, mattiase@acm.org, eliz@gnu.org, 54698@debbugs.gnu.org, p.stephani2@gmail.com To: Richard Stallman Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Fri Apr 08 07:51:52 2022 Return-path: Envelope-to: geb-bug-gnu-emacs@m.gmane-mx.org Original-Received: from lists.gnu.org ([209.51.188.17]) by ciao.gmane.io with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1nchXE-0006Ja-AR for geb-bug-gnu-emacs@m.gmane-mx.org; 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Fri, 8 Apr 2022 05:49:29 +0000 Original-Received: by hermes--canary-production-sg3-65d7bd97b5-5v4hr (VZM Hermes SMTP Server) with ESMTPA ID 45734e126427a47d15033752fe716772; Fri, 08 Apr 2022 05:49:23 +0000 (UTC) In-Reply-To: (Richard Stallman's message of "Fri, 08 Apr 2022 00:24:00 -0400") X-Mailer: WebService/1.1.20048 mail.backend.jedi.jws.acl:role.jedi.acl.token.atz.jws.hermes.yahoo X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list X-BeenThere: bug-gnu-emacs@gnu.org List-Id: "Bug reports for GNU Emacs, the Swiss army knife of text editors" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Original-Sender: "bug-gnu-emacs" Xref: news.gmane.io gmane.emacs.bugs:229550 Archived-At: Richard Stallman writes: > Concretely, what is this "knob"? Is it a per-process variable? If > so, we could make Emacs set it, with a Lisp function to specify the > value. It's a kernel parameter. It's not per-process, it applies to the entire system. Emacs could set it, but it would typically not have sufficient privileges to do so. > What is the precise definition of "no more memory left"? It's complicated. I think in addition to checking for free pages, Linux also tries to reclaim some cached data, and the inode cache, before determining that there is really no memory left. > The thrashing that I observed did not immediately kill any process. > Rather, it continued for minutes before doing so. So I don't think > there was "no more memory left on the system", because if that had > been the case, Linux would have known it immediately. Yes, the OOM killer typically kicks in before there is really no memory left.