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opnsense-src/sys/vm
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Bojan Novković 7a79d06697 vm: improve kstack_object pindex calculation to avoid pindex holes 
This commit replaces the linear transformation of kernel virtual
addresses to kstack_object pindex values with a non-linear
scheme that circumvents physical memory fragmentation caused by
kernel stack guard pages. The new mapping scheme is used to
effectively "skip" guard pages and assign pindices for
non-guard pages in a contiguous fashion.

The new allocation scheme requires that all default-sized kstack KVAs
come from a separate, specially aligned region of the KVA space.
For this to work, this commited introduces a dedicated per-domain
kstack KVA arena used to allocate kernel stacks of default size.
The behaviour on 32-bit platforms remains unchanged due to a
significatly smaller KVA space.

Aside from fullfilling the requirements imposed by the new scheme, a
separate kstack KVA arena facilitates superpage promotion in the rest
of kernel and causes most kstacks to have guard pages at both ends.

Reviewed by:  alc, kib, markj
Tested by:    markj
Approved by:  markj (mentor)
Differential Revision: https://reviews.freebsd.org/D38852
2024-04-10 17:37:20 +02:00
..
_vm_phys.h sys: Remove $FreeBSD$: two-line .h pattern 2023-08-16 11:54:11 -06:00
_vm_radix.h radix_trie: have vm_radix use pctrie code 2023-09-12 02:42:38 -05:00
device_pager.c sys: Automated cleanup of cdefs and other formatting 2023-11-26 22:24:00 -07:00
memguard.c sys: Remove $FreeBSD$: one-line .c pattern 2023-08-16 11:54:36 -06:00
memguard.h sys: Remove $FreeBSD$: two-line .h pattern 2023-08-16 11:54:11 -06:00
phys_pager.c sys: Automated cleanup of cdefs and other formatting 2023-11-26 22:24:00 -07:00
pmap.h pmap: Convert boolean_t to bool. 2024-01-31 14:48:26 -08:00
redzone.c sys: Automated cleanup of cdefs and other formatting 2023-11-26 22:24:00 -07:00
redzone.h sys: Remove $FreeBSD$: two-line .h pattern 2023-08-16 11:54:11 -06:00
sg_pager.c sys: Remove $FreeBSD$: one-line .c pattern 2023-08-16 11:54:36 -06:00
swap_pager.c swap_pager: Unbusy readahead pages after an I/O error 2024-04-08 09:02:48 -04:00
swap_pager.h sys: Remove ancient SCCS tags. 2023-11-26 22:23:30 -07:00
uma.h uma: Permit specifying max of cache line and some custom alignment 2023-11-02 09:30:03 -04:00
uma_align_mask.h uma: Make the cache alignment mask unsigned 2023-11-02 09:30:03 -04:00
uma_core.c uma: Improve memory modified after free panic messages 2023-11-09 19:46:26 -05:00
uma_dbg.c Fix build on powerpc after previous commit. 2023-11-09 21:21:47 -05:00
uma_dbg.h sys: Remove $FreeBSD$: two-line .h pattern 2023-08-16 11:54:11 -06:00
uma_int.h sys: Remove $FreeBSD$: two-line .h pattern 2023-08-16 11:54:11 -06:00
vm.h vm: add macro to mark arguments used when NUMA is defined 2024-04-09 10:23:47 -04:00
vm_domainset.c Avoid waiting on physical allocations that can't possibly be satisfied 2023-12-23 23:01:40 -06:00
vm_domainset.h Avoid waiting on physical allocations that can't possibly be satisfied 2023-12-23 23:01:40 -06:00
vm_dumpset.h sys: Remove $FreeBSD$: two-line .h pattern 2023-08-16 11:54:11 -06:00
vm_extern.h vm: improve kstack_object pindex calculation to avoid pindex holes 2024-04-10 17:37:20 +02:00
vm_fault.c sys: Remove ancient SCCS tags. 2023-11-26 22:23:30 -07:00
vm_glue.c vm: improve kstack_object pindex calculation to avoid pindex holes 2024-04-10 17:37:20 +02:00
vm_init.c sys: Automated cleanup of cdefs and other formatting 2023-11-26 22:24:00 -07:00
vm_kern.c Avoid waiting on physical allocations that can't possibly be satisfied 2023-12-23 23:01:40 -06:00
vm_kern.h vm: improve kstack_object pindex calculation to avoid pindex holes 2024-04-10 17:37:20 +02:00
vm_map.c sys: Automated cleanup of cdefs and other formatting 2023-11-26 22:24:00 -07:00
vm_map.h sys: Remove ancient SCCS tags. 2023-11-26 22:23:30 -07:00
vm_meter.c sys: Automated cleanup of cdefs and other formatting 2023-11-26 22:24:00 -07:00
vm_mmap.c Remove never implemented sbrk and sstk syscalls 2023-12-04 20:36:08 +00:00
vm_object.c sysctl vm.objects/vm.swap_objects: do not fill vnode info if jailed 2024-01-16 22:15:39 +02:00
vm_object.h sys: Remove ancient SCCS tags. 2023-11-26 22:23:30 -07:00
vm_page.c vm_page_reclaim_contig(): update comment to chase recent changes 2024-01-02 15:39:36 -06:00
vm_page.h vm: add macro to mark arguments used when NUMA is defined 2024-04-09 10:23:47 -04:00
vm_pageout.c sys: Remove ancient SCCS tags. 2023-11-26 22:23:30 -07:00
vm_pageout.h sys: Remove ancient SCCS tags. 2023-11-26 22:23:30 -07:00
vm_pagequeue.h sys: Remove ancient SCCS tags. 2023-11-26 22:23:30 -07:00
vm_pager.c sys: Remove ancient SCCS tags. 2023-11-26 22:23:30 -07:00
vm_pager.h sys: Remove ancient SCCS tags. 2023-11-26 22:23:30 -07:00
vm_param.h sys: Remove ancient SCCS tags. 2023-11-26 22:23:30 -07:00
vm_phys.c vm: add macro to mark arguments used when NUMA is defined 2024-04-09 10:23:47 -04:00
vm_phys.h vm: add macro to mark arguments used when NUMA is defined 2024-04-09 10:23:47 -04:00
vm_radix.c vm_radix: add a missing paren 2023-09-12 04:19:51 -05:00
vm_radix.h radix_trie: have vm_radix use pctrie code 2023-09-12 02:42:38 -05:00
vm_reserv.c vm_reserv_reclaim_contig: Return NULL not false 2024-04-10 08:50:16 -04:00
vm_reserv.h vm_reserv: Add vm_reserv_is_populated 2024-04-07 12:28:52 -05:00
vm_swapout.c vm: improve kstack_object pindex calculation to avoid pindex holes 2024-04-10 17:37:20 +02:00
vm_swapout_dummy.c sys: Automated cleanup of cdefs and other formatting 2023-11-26 22:24:00 -07:00
vm_unix.c sys: Automated cleanup of cdefs and other formatting 2023-11-26 22:24:00 -07:00
vnode_pager.c Add vnode_pager_clean_{a,}sync(9) 2024-01-11 18:44:53 +02:00
vnode_pager.h Add vnode_pager_clean_{a,}sync(9) 2024-01-11 18:44:53 +02:00