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Revision tags: v6.2.1, v6.2.0, v6.3.0, v6.0.1, v6.0.0, v6.0.0rc1, v6.1.0, v5.8.3, v5.8.2, v5.8.1, v5.8.0, v5.9.0, v5.8.0rc1, v5.6.3, v5.6.2, v5.6.1, v5.6.0, v5.6.0rc1, v5.7.0, v5.4.3, v5.4.2, v5.4.1, v5.4.0, v5.5.0, v5.4.0rc1, v5.2.2, v5.2.1, v5.2.0, v5.3.0, v5.2.0rc, v5.0.2, v5.0.1, v5.0.0, v5.0.0rc2, v5.1.0, v5.0.0rc1, v4.8.1, v4.8.0, v4.6.2, v4.9.0, v4.8.0rc |
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76f1911e |
| 23-Jan-2017 |
Matthew Dillon <dillon@apollo.backplane.com> |
kernel - pmap and vkernel work
* Remove the pmap.pm_token entirely. The pmap is currently protected
primarily by fine-grained locks and the vm_map lock. The intention
is to eventually be able
kernel - pmap and vkernel work
* Remove the pmap.pm_token entirely. The pmap is currently protected
primarily by fine-grained locks and the vm_map lock. The intention
is to eventually be able to protect it without the vm_map lock at all.
* Enhance pv_entry acquisition (representing PTE locations) to include
a placemarker facility for non-existant PTEs, allowing the PTE location
to be locked whether a pv_entry exists for it or not.
* Fix dev_dmmap (struct dev_mmap) (for future use), it was returning a
page index for physical memory as a 32-bit integer instead of a 64-bit
integer.
* Use pmap_kextract() instead of pmap_extract() where appropriate.
* Put the token contention test back in kern_clock.c for real kernels
so token contention shows up as sys% instead of idle%.
* Modify the pmap_extract() API to also return a locked pv_entry,
and add pmap_extract_done() to release it. Adjust users of
pmap_extract().
* Change madvise/mcontrol MADV_INVAL (used primarily by the vkernel)
to use a shared vm_map lock instead of an exclusive lock. This
significantly improves the vkernel's performance and significantly
reduces stalls and glitches when typing in one under heavy loads.
* The new placemarkers also have the side effect of fixing several
difficult-to-reproduce bugs in the pmap code, by ensuring that
shared and unmanaged pages are properly locked whereas before only
managed pages (with pv_entry's) were properly locked.
* Adjust the vkernel's pmap code to use atomic ops in numerous places.
* Rename the pmap_change_wiring() call to pmap_unwire(). The routine
was only being used to unwire (and could only safely be called for
unwiring anyway). Remove the unused 'wired' and the 'entry'
arguments.
Also change how pmap_unwire() works to remove a small race condition.
* Fix race conditions in the vmspace_*() system calls which could lead
to pmap corruption. Note that the vkernel did not trigger any of
these conditions, I found them while looking for another bug.
* Add missing maptypes to procfs's /proc/*/map report.
show more ...
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Revision tags: v4.6.1, v4.6.0, v4.6.0rc2, v4.6.0rc, v4.7.0, v4.4.3, v4.4.2, v4.4.1, v4.4.0, v4.5.0, v4.4.0rc, v4.2.4, v4.3.1, v4.2.3, v4.2.1, v4.2.0, v4.0.6, v4.3.0, v4.2.0rc, v4.0.5, v4.0.4, v4.0.3, v4.0.2, v4.0.1, v4.0.0, v4.0.0rc3, v4.0.0rc2, v4.0.0rc, v4.1.0, v3.8.2, v3.8.1, v3.6.3, v3.8.0, v3.8.0rc2, v3.9.0, v3.8.0rc, v3.6.2, v3.6.1, v3.6.0, v3.7.1, v3.6.0rc, v3.7.0, v3.4.3, v3.4.2, v3.4.0, v3.4.1, v3.4.0rc, v3.5.0, v3.2.2, v3.2.1, v3.2.0, v3.3.0, v3.0.3 |
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a5f7a14b |
| 06-Aug-2012 |
François Tigeot <ftigeot@wolfpond.org> |
kernel: Import sglist subsystem from FreeBSD
Fixes-from: swildner
Blessed-by: vsrinivas
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