src/sys/alpha/include, branch releng/5.3 FreeBSD source tree https://cgit-dev.freebsd.org/src/atom?h=releng%2F5.3 2004-09-13T21:52:04Z MFC: 2004-09-13T21:52:04Z Wilko Bulte wilko@FreeBSD.org 2004-09-13T21:52:04Z urn:sha1:46be224b52871a71e93dea0d329da46cf69aa827 revision 1.19 date: 2004/09/10 05:00:27; author: marcel; state: Exp; lines: +14 -62 The previous commit, roughly one and a half years ago removed the branch prediction optimization for LINT, because the kernel was too large. This commit now removes it altogether since it causes build failures for GENERIC kernels and the various applicable trends are such that one can expect that it these failure will cause more problems than they're worth in the future. These trends include: 1. Alpha was demoted from tier 1 to tier 2 due to lack of active support. The number of people willing to fix build breakages is not likely to increase and those developers that do have the gumption to test MI changes on alpha are not likely to spend time fixing unexpected build failures first. 2. The kernel will only increase in size. Even though stripped-down kernels do link without problems now, compiler optimizations (like inlining) and new (non-optional) functionality will likely cause stripped-down kernels to break in the future as well. So, with my asbestos suit on, get rid of potential problems before they happen. Approved by: re (scottl) MFC: Turn PREEMPTION into a kernel option. It is NOT enabled at this time. 2004-09-10T00:04:18Z Scott Long scottl@FreeBSD.org 2004-09-10T00:04:18Z urn:sha1:69ba7f59694787612ef7782b368ccf60a6b8ab75 Approved by: re Instead of calling ia32_pause() conditionally on __i386__ or __amd64__ 2004-08-03T18:44:27Z Maxime Henrion mux@FreeBSD.org 2004-08-03T18:44:27Z urn:sha1:9f1b87f106100470dafeeab83abfa98ab86be3f7 being defined, define and use a new MD macro, cpu_spinwait(). It only expands to something on i386 and amd64, so the compiled code should be identical. Name of the macro found by: jhb Reviewed by: jhb Remove extraneous ';'. 2004-08-01T18:51:44Z Mark Murray markm@FreeBSD.org 2004-08-01T18:51:44Z urn:sha1:a5ed4a0ad56e65dde2d2981452679188025705be Turn off PREEMPTION by default while it gets debugged. It's been causing 2004-08-01T14:31:45Z Scott Long scottl@FreeBSD.org 2004-08-01T14:31:45Z urn:sha1:9352fe30a03aad0c103c302ed6310291f9375ca6 4 weeks of problems including deadlocks and instant panics. Note that the real bugs are likely in the scheduler. Break out the MI part of the /dev/[k]mem and /dev/io drivers into 2004-08-01T11:40:54Z Mark Murray markm@FreeBSD.org 2004-08-01T11:40:54Z urn:sha1:8ab2f5ecc596131f6ca790d6ae35540c06ed7985 their own directory and module, leaving the MD parts in the MD area (the MD parts _are_ part of the modules). /dev/mem and /dev/io are now loadable modules, thus taking us one step further towards a kernel created entirely out of modules. Of course, there is nothing preventing the kernel from having these statically compiled. Pass a thread argument into cpu_critical_{enter,exit}() rather than 2004-07-27T16:41:01Z Robert Watson rwatson@FreeBSD.org 2004-07-27T16:41:01Z urn:sha1:1a8cfbc45096bb34daeddc44ba75ff8377e9e5c8 dereference curthread. It is called only from critical_{enter,exit}(), which already dereferences curthread. This doesn't seem to affect SMP performance in my benchmarks, but improves MySQL transaction throughput by about 1% on UP on my Xeon. Head nodding: jhb, bmilekic - Eliminate the pte object from the pmap. Instead, page table pages are 2004-07-19T18:12:04Z Alan Cox alc@FreeBSD.org 2004-07-19T18:12:04Z urn:sha1:e832aafc51a232b2cafb3c942a1ddecffe9ba8c9 allocated as "no object" pages. Similar changes were made to the amd64 and i386 pmap last year. The primary reason being that maintaining a pte object leads to lock order violations. A secondary reason being that the pte object is redundant, i.e., the page table itself can be used to lookup page table pages. (Historical note: The pte object predates our ability to allocate "no object" pages. Thus, the pte object was a necessary evil.) - Unconditionally check the vm object lock's status in vm_page_remove(). Previously, this assertion could not be made on Alpha due to its use of a pte object. Rev 1.24 of sys/ptrace.h adds ptrace_clear_single_step() prototype 2004-07-13T16:11:04Z Ken Smith kensmith@FreeBSD.org 2004-07-13T16:11:04Z urn:sha1:546d42ad9da9fb8dda85ec1a388a88bf9328e614 definition so this one causes "redundant declaration" error and breaks Alpha kernel build. Reviewed by: gallatin@ and test build on beast Mega update for the KDB framework: turn DDB into a KDB backend. 2004-07-10T23:47:20Z Marcel Moolenaar marcel@FreeBSD.org 2004-07-10T23:47:20Z urn:sha1:37224cd3fcb911d440e40dd8e1f31652e2452537 Most of the changes are a direct result of adding thread awareness. Typically, DDB_REGS is gone. All registers are taken from the trapframe and backtraces use the PCB based contexts. DDB_REGS was defined to be a trapframe on all platforms anyway. Thread awareness introduces the following new commands: thread X switch to thread X (where X is the TID), show threads list all threads. The backtrace code has been made more flexible so that one can create backtraces for any thread by giving the thread ID as an argument to trace. With this change, ia64 has support for breakpoints.