| Message ID | 20180919084802.183381-1-frankja@linux.ibm.com (mailing list archive) |
|---|---|
| Headers | show |
| Series | KVM: s390: Huge page splitting and shadowing | expand |
On 19.09.18 10:47, Janosch Frank wrote: > Let's continue with the hpage updates and introduce splitting as well > as VSIE support. A lot of problems have been fixed since I introduced > these patches the last time. Swapping and loaded migration tests have > been successful. Now that vfio-ap has been merged, let's bring this up again. Ping > > The locking is now done via the userspace mm pmd lock instead of the > guest_table_lock, which fixed a lot of potential locking problems > between pgtable.c and gmap.c functions. > > VSIE handling has been slightly redesigned to handle all combinations > instead of only edge cases. > > Split pages are being modified by common pgtable.c functions as much > as possible and got pgste locking before modifications. > > There's still a lot of cleanup and documentation to do, but let's put > it out there. > > Branch: > git://git.kernel.org/pub/scm/linux/kernel/git/kvms390/linux.git hlp_vsie > https://git.kernel.org/pub/scm/linux/kernel/git/kvms390/linux.git/log/?h=hlp_vsie > > Janosch Frank (14): > s390/mm: Code cleanups > s390/mm: Improve locking for huge page backings > s390/mm: Take locking out of gmap_protect_pte > s390/mm: split huge pages in GMAP when protecting > s390/mm: Split huge pages when migrating > s390/mm: Provide vmaddr to pmd notification > s390/mm: Add gmap_idte_global > s390/mm: Make gmap_read_table EDAT1 compatible > s390/mm: Make gmap_protect_rmap EDAT1 compatible > s390/mm: Add simple ptep shadow function > s390/mm: Add gmap shadowing for large pmds > s390/mm: Add gmap lock classes > s390/mm: Pull pmd invalid check in gmap_pmd_op_walk > KVM: s390: Allow the VSIE to be used with huge pages > > Documentation/virtual/kvm/api.txt | 7 +- > arch/s390/include/asm/gmap.h | 31 +- > arch/s390/include/asm/pgtable.h | 5 + > arch/s390/kvm/gaccess.c | 52 ++- > arch/s390/kvm/kvm-s390.c | 14 +- > arch/s390/mm/gmap.c | 905 ++++++++++++++++++++++++++++---------- > arch/s390/mm/pgtable.c | 61 ++- > 7 files changed, 806 insertions(+), 269 deletions(-) >
On 08/10/2018 11:10, Janosch Frank wrote: > On 19.09.18 10:47, Janosch Frank wrote: >> Let's continue with the hpage updates and introduce splitting as well >> as VSIE support. A lot of problems have been fixed since I introduced >> these patches the last time. Swapping and loaded migration tests have >> been successful. > > Now that vfio-ap has been merged, let's bring this up again. > Ping Yes, on my list. Unfortunately quite busy right now - will get better once KVM forum is over. Definitely planning to look into this.