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|10fe6f80||mhorne||Nov. 19, 2021, 7:05 p.m.||minidump: Use the provided dump bitset
When constructing the set of dumpable pages, use the bitset provided by the state argument, rather than assuming vm_page_dump invariably. For normal kernel minidumps this will be a pointer to vm_page_dump, but when dumping the live system it will not. To do this, the functions in vm_dumpset.h are extended to accept the desired bitset as an argument. Note that this provided bitset is assumed to be derived from vm_page_dump, and therefore has the same size. Reviewed by: kib, markj, jhb MFC after: 2 weeks Sponsored by: Juniper Networks, Inc. Sponsored by: Klara, Inc. Differential Revision: https://reviews.freebsd.org/D31992cgit
|1d2d1418||mhorne||Nov. 19, 2021, 7:05 p.m.||minidump: Use provided msgbuf pointer
Don't assume we are dumping the global message buffer, but use the one provided by the state argument. While here, drop superfluous cast to char *. Reviewed by: markj, jhb MFC after: 2 weeks Sponsored by: Juniper Networks, Inc. Sponsored by: Klara, Inc. Differential Revision: https://reviews.freebsd.org/D31991cgit
|681bd710||mhorne||Nov. 19, 2021, 7:05 p.m.||minidump: reduce the amount direct accesses to page tables
During a live dump, we may race with updates to the kernel page tables. This is generally okay; we accept that the state of the system while dumping may be somewhat inconsistent with its state when the dump was invoked. However, when walking the kernel page tables, it is important that we load each PDE/PTE only once while operating on it. Otherwise, it is possible to have the relevant PTE change underneath us. For example, after checking the valid bit, but before reading the physical address. Convert the loads to atomics, and add some validation around the physical addresses, to ensure that we do not try to dump a non-existent or non-canonical physical address. Similarly, don't read kernel_vm_end more than once, on the off chance that pmap_growkernel() is called between the two page table walks. Reviewed by: kib, markj MFC after: 2 weeks Sponsored by: Juniper Networks, Inc. Sponsored by: Klara, Inc. Differential Revision: https://reviews.freebsd.org/D31990cgit
|90d4da62||mhorne||Nov. 19, 2021, 7:05 p.m.||amd64: provide PHYS_IN_DMAP() and VIRT_IN_DMAP()|
|1adebe3c||mhorne||Nov. 19, 2021, 7:05 p.m.||minidump: Parameterize minidumpsys()
The minidump code is written assuming that certain global state will not change, and rightly so, since it executes from a kernel debugger context. In order to support taking minidumps of a live system, we should allow copies of relevant global state that is likely to change to be passed as parameters to the minidumpsys() function. This patch does the work of parameterizing this function, by adding a struct minidumpstate argument. For now, this struct allows for copies of the kernel message buffer, and the bitset that tracks which pages should be dumped (vm_page_dump). Follow-up changes will actually make use of these arguments. Notably, dump_avail does not need a snapshot, since it is not expected to change after system initialization. The existing minidumpsys() definitions are renamed, and a thin MI wrapper is added to kern_dump.c, which handles the construction of the state struct. Thus, calling minidumpsys() remains as simple as before. Reviewed by: kib, markj, jhb Sponsored by: Juniper Networks, Inc. Sponsored by: Klara, Inc. MFC after: 2 weeks Differential Revision: https://reviews.freebsd.org/D31989cgit
|840d7237||gbe||Nov. 19, 2021, 7:04 p.m.||lpr(1): Fix a typo in a source code comment
-s /debuging/debugging/ MFC after: 3 dayscgit
|d7125850||gbe||Nov. 19, 2021, 6:59 p.m.||ixl(4): Fix a typo in a sysctl description
MFC after: 3 dayscgit
|8acb6621||gbe||Nov. 19, 2021, 6:51 p.m.||iwm(4): Fix a typo in a source code comment
- s/availabe/available/ MFC after: 3 dayscgit
|3e5ddef0||gbe||Nov. 19, 2021, 6:50 p.m.||firewire(4): Fix a typo in a source code comment
- s/unavailabe/unavailable/ MFC after: 3 dayscgit
|5e21882b||gbe||Nov. 19, 2021, 6:29 p.m.||iscsi(4): Fix a typo in a source code comment
- s/conditon/condition/ MFC after: 3 dayscgit
|8b11850f||gbe||Nov. 19, 2021, 6:26 p.m.||TWL: Fix a typo in a source code comment
- s/maxium/maximum/ MFC after: 3 dayscgit
|975e2e3f||gbe||Nov. 19, 2021, 6:19 p.m.||ppbus(4): Fix a typo in source code comment
- s/quering/querying/ Obtained from: NetBSD MFC after: 3 dayscgit
|bebff615||gbe||Nov. 19, 2021, 6:17 p.m.||ffs_softdep: Fix a typo in a source code comment
- s/conditonally/conditionally/ MFC after: 3 dayscgit
|b4fbc855||gbe||Nov. 19, 2021, 6:16 p.m.||cc_newreno(4): Fix a typo in a source code comment
- s/conditons/conditions/ MFC after: 3 dayscgit
|15b5c347||gbe||Nov. 19, 2021, 6:13 p.m.||sched_ule(4): Fix two typo in source code comments
- s/conditons/conditions/ - s/unconditonally/unconditionally/ MFC after: 3 dayscgit