Date: Tue, 27 Jun 2000 10:37:56 -0700 (PDT) From: John Polstra G <jdp@polstra.com> To: current@freebsd.org Subject: Questions about kmem_malloc and SPL levels Message-ID: <XFMail.000627103756.jdp@polstra.com>
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The comment leading into kmem_malloc (in sys/vm/vm_kern.c) is worrying me: * This routine has its own private kernel submap (kmem_map) and object * (kmem_object). This, combined with the fact that only malloc uses * this routine, ensures that we will never block in map or object waits. Actually, this function is called by m_clalloc (in sys/kern/uipc_mbuf.c) too. The comment is obviously wrong. Is it a problem that this assumption is violated? * Note that this still only works in a uni-processor environment and * when called at splhigh(). The first part will be news to the folks running SMP. :-) The business about splhigh is also wrong. But what worries me is that malloc calls it at splmem, while m_clalloc calls it at splimp. Is that a problem? John --- John Polstra jdp@polstra.com John D. Polstra & Co., Inc. Seattle, Washington USA "Disappointment is a good sign of basic intelligence." -- Chögyam Trungpa To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message
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