Date: Tue, 18 Jun 2002 22:36:36 -0600 From: "Kenneth D. Merry" <ken@kdm.org> To: current@FreeBSD.org Cc: net@FreeBSD.org Subject: new zero copy sockets snapshot Message-ID: <20020618223635.A98350@panzer.kdm.org>
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I've released a new zero copy sockets snapshot, against -current from June 18th, 2002. http://people.FreeBSD.org/~ken/zero_copy The fixes that went into this snapshot: - Take mutex locking out of ti_attach(), it isn't really needed. As long as we can assume that probes of successive ti(4) instances happen sequentially, we'll be safe in doing this. Thanks to John Baldwin for pointing out the solution to that problem. (The lock in ti_attach() was causing all sorts of WITNESS warnings when bus_setup_intr() was called.) - Added a new routine, vm_object_allocate_wait(). This is a variant of vm_object_allocate() that allows the user to specify whether the uma_zalloc() call inside vm_object_allocate_wait() is called with M_WAITOK or M_NOWAIT. This eliminates a WITNESS warning caused when jumbo_vm_init() calls vm_object_allocate() with the jumbo lock held, and potentially gives other callers the option of eliminating the mandatory wait on the uma_zalloc() call. (vm_object_allocate() now just calls vm_object_allocate_wait() with the proper argument.) With those fixes, plus several fixes that have gone into -current over the past week or so, the zero copy sockets code runs without any WITNESS warnings at all now. Ken -- Kenneth Merry ken@kdm.org To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message
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