serves as less of a barrier these days. Restrict provision of kernel reserve
pages to kmem and one of these cases:
- doing a NOWAIT allocation
- caller is a realtime thread
- caller is a kernel thread
- explicitly requested, for example by the pmap
uvmpd_scan_queue:
- Fix a bug that prevented the pagedaemon from making forward progress
if (a) swap was full (b) the first 16 pages on the inactive list were
unbusy anons not already backed by swap.
- Remove redundant uvm_swapisfull() check and just try to allocate a slot.
If it fails we know swap is full.
uvm_swapisfull: don't count some small portion as it may be inaccessible to
us at any given moment, for example if there is lock contention or if pages
are busy.
which is now the "API" provided by the pmap module. pmap_kernel()
remains as the syntactic sugar.
Bonus cosmetics round: move all the pmap_t pointer typedefs into
uvm_pmap.h.
Thanks to Greg Oster for providing cpu muscle for doing test builds.
into modules. By and large this commit:
- shuffles header files and ifdefs
- splits code out where necessary to be modular
- adds module glue for each of the components
- adds/replaces hooks for things that can be installed at runtime
unused kernel modules.
- Try to unload any autoloaded kernel modules 10 seconds after their
load was successful.
- Keep a counter to track module load/unload events.
- Add UFS_WAPBL_BEGIN() / UFS_WAPBL_END() where needed.
- Expunge WAPBL log inodes from snapshots.
- Ffs_copyonwrite() and ffs_snapblkfree() must run inside a WAPBL transaction.
- Add ffs_gop_write() as a wrapper around genfs_gop_write() that makes sure
genfs_gop_write() gets always called inside a WAPBL transaction.
- Add VOP_PUTPAGES() flag PGO_JOURNALLOCKED to tag calls to VOP_PUTPAGES()
inside a WAPBL transaction.
Reviewed by: Simon Burge <simonb@netbsd.org>, Greg Oster <oster@netbsd.org>
PGO_JOURNALLOCKED / ffs_gop_write() part presented on tech-kern@.
ambiguous members ownspace/space to gap/maxgap. Add some evcnt for
evaluation of lookups using tree/list. Drop threshold of using
tree for lookups from > 30 to > 15.
Bump kernel version to 4.99.71
