One possible refinement that I should mention;
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Sep 14 2019
Sep 14 2019
jeff added a comment to D21548: (vm object 1) Replace busy checks and sleeps with acquires where it is trivial to do so..
Sep 13 2019
Sep 13 2019
jeff added inline comments to D21629: Add support for multithreading the inactive queue pageout within a domain..
Sep 12 2019
Sep 12 2019
jeff updated the summary of D21629: Add support for multithreading the inactive queue pageout within a domain..
Can you describe the consumer visible effect you are trying to achieve? Is it just releasn?
Sep 10 2019
Sep 10 2019
jeff updated the summary of D21598: Use atomics for object reference count so that we can use the shared lock to protect it..
jeff retitled D21596: (vm object 6) Convert pmap_is_modified, pmap_remove_write, and pmap_clear_modify to expecting busy to be held by the caller now that all callers hold it. from Convert pmap_is_modified, pmap_remove_write, and pmap_clear_modify to expecting busy to be held by the caller now that all callers hold it. to (vm object 6) Convert pmap_is_modified, pmap_remove_write, and pmap_clear_modify to expecting busy to be held by the caller now that all callers hold it..
jeff retitled D21595: (vm object 5) Move PGA_NOSYNC to VPA_NOSYNC so that the object lock is not required. from Move PGA_NOSYNC to VPA_NOSYNC so that the object lock is not required. to (vm object 5) Move PGA_NOSYNC to VPA_NOSYNC so that the object lock is not required..
jeff retitled D21594: (vm object 4) Wrap valid accesses in inlines. Add missing busy acquires to protect valid. from Wrap valid accesses in inlines. Add missing busy acquires to protect valid. to (vm object 4) Wrap valid accesses in inlines. Add missing busy acquires to protect valid..
jeff retitled D21592: (vm object 3) Add a shared object busy synchronization mechanism that blocks new page busy acquires while held. from Add a shared object busy synchronization mechanism that blocks new page busy acquires while held. to (vm object 3) Add a shared object busy synchronization mechanism that blocks new page busy acquires while held..
jeff retitled D21549: (vm object 2) Don't release xbusy in vm_page_remove(), defer to vm_page_free_prep(). from Don't release xbusy in vm_page_remove(), defer to vm_page_free_prep(). to (vm object 2) Don't release xbusy in vm_page_remove(), defer to vm_page_free_prep()..
jeff retitled D21548: (vm object 1) Replace busy checks and sleeps with acquires where it is trivial to do so. from Replace busy checks and sleeps with acquires where it is trivial to do so. to (vm object 1) Replace busy checks and sleeps with acquires where it is trivial to do so..
jeff added inline comments to D21549: (vm object 2) Don't release xbusy in vm_page_remove(), defer to vm_page_free_prep()..
Replace redundant code with a few new vm_page_grab facilities:
Use the sleepq lock rather than the page lock to protect against wakeup
jeff added inline comments to D21549: (vm object 2) Don't release xbusy in vm_page_remove(), defer to vm_page_free_prep()..
Sep 6 2019
Sep 6 2019
jeff added inline comments to D21255: Remove the page lock dependency on busy sleeps by using sleepq to avoid races..
jeff retitled D21549: (vm object 2) Don't release xbusy in vm_page_remove(), defer to vm_page_free_prep(). from Don't release xbusy in vm_page_remove(), defer to vm_page_free_prep(). Some callers like vm_page_remove/replace want busy state to persist. to Don't release xbusy in vm_page_remove(), defer to vm_page_free_prep()..
jeff updated the summary of D21548: (vm object 1) Replace busy checks and sleeps with acquires where it is trivial to do so..
jeff retitled D21546: Eliminate redundant vm code with a few new convenience functions. from Eliminate redundant with a few new convenience functions. to Eliminate redundant vm code with a few new convenience functions..
Sep 5 2019
Sep 5 2019
jeff updated the diff for D21255: Remove the page lock dependency on busy sleeps by using sleepq to avoid races..
Resolve identity change issues
jeff added a comment to D17885: ULE scheduler: Interrupt thread natural binding to the core receiving the interrupt event is easily ignored.
This looks correct to me. Do you have any information from testing? How was this found?
Aug 21 2019
Aug 21 2019
D21357: Move OBJT_VNODE specific code from vm_object_terminate() to vnode_destroy_vobject(). is now accepted and ready to land.
jeff added a comment to D21357: Move OBJT_VNODE specific code from vm_object_terminate() to vnode_destroy_vobject()..
In general I like this but the double setting of OBJ_DEAD does make it harder to detect things like double frees.
Aug 20 2019
Aug 20 2019
jeff added inline comments to D21331: Eliminate redundant code by introducing a vm_page_grab_valid().
jeff added inline comments to D21332: Augment vm_page_grab to support more cases that want to acquire busy locks..
jeff added inline comments to D21332: Augment vm_page_grab to support more cases that want to acquire busy locks..
So it is ok to skip has_pages for vnode objects? This is a slight optimization that seems worthwhile to me.
jeff retitled D21332: Augment vm_page_grab to support more cases that want to acquire busy locks. from Augment vm_page_grab to support more cases that want to acquire busy locks.
Add a new function, vm_page_busy_acquire(), to support others. to Augment vm_page_grab to support more cases that want to acquire busy locks..
jeff retitled D21331: Eliminate redundant code by introducing a vm_page_grab_valid() from Eliminate redundant code by introducing a vm_page_grab_valid that will use
the pager to bring in pages that are not valid. to Eliminate redundant code by introducing a vm_page_grab_valid().
jeff added a comment to D21255: Remove the page lock dependency on busy sleeps by using sleepq to avoid races..
Respond to review feedback. Eliminate the object locking changes for now.
Aug 19 2019
Aug 19 2019
jeff updated the summary of D21329: Bind to a CPU in the device's domain if UMA will allocate the memory there..
jeff committed rS351241: Use an atomic reference count for paging in progress so that callers do not.
Use an atomic reference count for paging in progress so that callers do not
Permit vm_pager_has_page() to run with a shared lock. Introduce
D16667: Extend uma_reclaim() to permit different reclamation targets. is now accepted and ready to land.
D20486: Change synchonization rules for page reference counting. is now accepted and ready to land.
Aug 18 2019
Aug 18 2019
Allocate all per-cpu datastructures in domain correct memory.
Allocate amd64's page array using pages and page directory pages from the
jeff committed rS351188: Add a blocking wait bit to refcount. This allows refs to be used as a simple.
Add a blocking wait bit to refcount. This allows refs to be used as a simple
jeff retitled D21310: Allow calls to vm_pager_haspages with the object read locked from Allow read locked objects to call has_pages to Allow calls to vm_pager_haspages with the object read locked.
If there is no strong objection I will commit this tomorrow.
Address review feedback. Move the page array between the direct map and kva.
jeff committed rS351183: Remove unnecessary debugging from r351181 that caused powerpc build to fail..
Remove unnecessary debugging from r351181 that caused powerpc build to fail.
vm_phys_avail_find is only used on NUMA kernels. Fix a build error.
Encapsulate phys_avail manipulation in a set of simple routines. Add a
Aug 16 2019
Aug 16 2019
jeff committed rS351108: Move phys_avail definition into MI code. It is consumed in the MI layer and.
Move phys_avail definition into MI code. It is consumed in the MI layer and
Aug 15 2019
Aug 15 2019
Aug 14 2019
Aug 14 2019
jeff added a comment to D21255: Remove the page lock dependency on busy sleeps by using sleepq to avoid races..
Address review feedback. Clean up patch. Switch to fcmpset and rel semantics.
jeff added inline comments to D21255: Remove the page lock dependency on busy sleeps by using sleepq to avoid races..
Address review feedback
Aug 13 2019
Aug 13 2019
Address some of Markj's feedback. Move the last ref drop into a dedicated function to lessen text bloat.
jeff added inline comments to D21255: Remove the page lock dependency on busy sleeps by using sleepq to avoid races..
jeff added inline comments to D21255: Remove the page lock dependency on busy sleeps by using sleepq to avoid races..
jeff updated the summary of D21255: Remove the page lock dependency on busy sleeps by using sleepq to avoid races..