A-Team_Digital_Solutions/android_kernel_motorola_sm6375
Watch
2
0
Fork
You've already forked android_kernel_motorola_sm6375
 0
mirror of https://github.com/BobTheBlinker/android_kernel_motorola_sm6375.git synced 2026-10-29 03:01:39 -04:00
Code Issues Projects Releases Packages Wiki Activity

KVM: MMU: document write_flooding_count

Browse source 
Document write_flooding_count to Documentation/virtual/kvm/mmu.txt

Signed-off-by: Xiao Guangrong <[email protected]>
Signed-off-by: Paolo Bonzini <[email protected]>
This commit is contained in:
Xiao Guangrong 2013-06-19 17:09:21 +08:00 • committed by Gleb Natapov
commit 0cbf8e437b
2 changed files with 10 additions and 0 deletions
Download patch file Download diff file Expand all files Collapse all files

9
Documentation/virtual/kvm/mmu.txt
View file

@ -215,6 +215,15 @@ Shadow pages contain the following information:
atomically. The reader uses this while running out of the MMU lock
to detect in-progress updates and retry them until the writer has
finished the write.
write_flooding_count:
A guest may write to a page table many times, causing a lot of
emulations if the page needs to be write-protected (see "Synchronized
and unsynchronized pages" below). Leaf pages can be unsynchronized
so that they do not trigger frequent emulation, but this is not
possible for non-leafs. This field counts the number of emulations
since the last time the page table was actually used; if emulation
is triggered too frequently on this page, KVM will unmap the page
to avoid emulation in the future.
Reverse map
===========