search for: frankeh

From: Martin Schwidefsky <schwidefsky@de.ibm.com> From: Hubertus Franke <frankeh@watson.ibm.com> From: Himanshu Raj <rhim@cc.gatech.edu> [patch 1/9] Guest page hinting: unused / free pages. A very simple but already quite effective improvement in the handling of guest memory vs. host memory is to tell the host when pages are free. That allows the host to avoid the pa...

From: Martin Schwidefsky <schwidefsky@de.ibm.com> From: Hubertus Franke <frankeh@watson.ibm.com> From: Himanshu Raj <rhim@cc.gatech.edu> [patch 1/9] Guest page hinting: unused / free pages. A very simple but already quite effective improvement in the handling of guest memory vs. host memory is to tell the host when pages are free. That allows the host to avoid the pa...

Greetings, the circus is back in town -- another version of the guest page hinting patches. The patches differ from version 6 only in the kernel version, they apply against 2.6.29. My short sniff test showed that the code is still working as expected. To recap (you can skip this if you read the boiler plate of the last version of the patches): The main benefit for guest page hinting vs. the

Greetings, the circus is back in town -- another version of the guest page hinting patches. The patches differ from version 6 only in the kernel version, they apply against 2.6.29. My short sniff test showed that the code is still working as expected. To recap (you can skip this if you read the boiler plate of the last version of the patches): The main benefit for guest page hinting vs. the

Greetings, the circus is back in town -- another version of the guest page hinting patches. The patches differ from version 6 only in the kernel version, they apply against 2.6.29. My short sniff test showed that the code is still working as expected. To recap (you can skip this if you read the boiler plate of the last version of the patches): The main benefit for guest page hinting vs. the

From: Martin Schwidefsky <schwidefsky@de.ibm.com> From: Hubertus Franke <frankeh@watson.ibm.com> From: Himanshu Raj <rhim@cc.gatech.edu> [patch 8/9] Guest page hinting: discarded page list. The discarded page list is used to postpone the freeing of discarded pages. The PG_discarded is set by either __remove_from_page_cache, __delete_from_swap_cache or the discard fau...

From: Martin Schwidefsky <schwidefsky@de.ibm.com> From: Hubertus Franke <frankeh@watson.ibm.com> From: Himanshu Raj <rhim@cc.gatech.edu> [patch 8/9] Guest page hinting: discarded page list. The discarded page list is used to postpone the freeing of discarded pages. The PG_discarded is set by either __remove_from_page_cache, __delete_from_swap_cache or the discard fau...

Greetings, after Carsten pitched CMM2 on the kvm mini summit here is a repost of version 5 of the guest page hinting patches. The code is still the same but has been adapted to the latest git level. -- blue skies, Martin. "Reality continues to ruin my life." - Calvin.

Greetings, after Carsten pitched CMM2 on the kvm mini summit here is a repost of version 5 of the guest page hinting patches. The code is still the same but has been adapted to the latest git level. -- blue skies, Martin. "Reality continues to ruin my life." - Calvin.

From: Martin Schwidefsky <schwidefsky@de.ibm.com> From: Hubertus Franke <frankeh@watson.ibm.com> From: Himanshu Raj <rhim@cc.gatech.edu> [patch 5/9] Guest page hinting: mlocked pages. Add code to get mlock() working with guest page hinting. The problem with mlock is that locked pages may not be removed from page cache. That means they need to be stable. page_make_vol...

From: Martin Schwidefsky <schwidefsky@de.ibm.com> From: Hubertus Franke <frankeh@watson.ibm.com> From: Himanshu Raj <rhim@cc.gatech.edu> [patch 5/9] Guest page hinting: mlocked pages. Add code to get mlock() working with guest page hinting. The problem with mlock is that locked pages may not be removed from page cache. That means they need to be stable. page_make_vol...

After way to many months here is the fifth version of the guest page hinting patches. Compared to version four a few improvements have been added: - Avoid page_host_discards() calls outside of page-states.h - The discard list is now implemented via the page_free_discarded hook and architecture specific code. - PG_state_change page flag has been replaced with architecture specficic

After way to many months here is the fifth version of the guest page hinting patches. Compared to version four a few improvements have been added: - Avoid page_host_discards() calls outside of page-states.h - The discard list is now implemented via the page_free_discarded hook and architecture specific code. - PG_state_change page flag has been replaced with architecture specficic

From: Martin Schwidefsky <schwidefsky@de.ibm.com> From: Hubertus Franke <frankeh@watson.ibm.com> From: Himanshu Raj <rhim@cc.gatech.edu> [patch 2/9] Guest page hinting: unused / free pages on s390. s390 uses the milli-coded ESSA instruction to set the page state. The page state is formed by four guest page states called block usage states and three host page states c...

From: Martin Schwidefsky <schwidefsky@de.ibm.com> From: Hubertus Franke <frankeh@watson.ibm.com> From: Himanshu Raj <rhim@cc.gatech.edu> [patch 2/9] Guest page hinting: unused / free pages on s390. s390 uses the milli-coded ESSA instruction to set the page state. The page state is formed by four guest page states called block usage states and three host page states c...

From: Martin Schwidefsky <schwidefsky@de.ibm.com> From: Hubertus Franke <frankeh@watson.ibm.com> From: Himanshu Raj <rhim@cc.gatech.edu> [patch 6/9] Guest page hinting: writable page table entries. The volatile state for page cache and swap cache pages requires that the host system needs to be able to determine if a volatile page is dirty before removing it. This exc...

From: Martin Schwidefsky <schwidefsky@de.ibm.com> From: Hubertus Franke <frankeh@watson.ibm.com> From: Himanshu Raj <rhim@cc.gatech.edu> [patch 6/9] Guest page hinting: writable page table entries. The volatile state for page cache and swap cache pages requires that the host system needs to be able to determine if a volatile page is dirty before removing it. This exc...

From: Martin Schwidefsky <schwidefsky@de.ibm.com> From: Hubertus Franke <frankeh@watson.ibm.com> From: Himanshu Raj <rhim@cc.gatech.edu> [patch 4/9] Guest page hinting: volatile swap cache. The volatile page state can be used for anonymous pages as well, if they have been added to the swap cache and the swap write is finished. The tricky bit is in free_swap_and_cache...

From: Martin Schwidefsky <schwidefsky@de.ibm.com> From: Hubertus Franke <frankeh@watson.ibm.com> From: Himanshu Raj <rhim@cc.gatech.edu> [patch 4/9] Guest page hinting: volatile swap cache. The volatile page state can be used for anonymous pages as well, if they have been added to the swap cache and the swap write is finished. The tricky bit is in free_swap_and_cache...

From: Martin Schwidefsky <schwidefsky@de.ibm.com> From: Hubertus Franke <frankeh@watson.ibm.com> From: Himanshu Raj <rhim@cc.gatech.edu> [patch 3/9] Guest page hinting: volatile page cache. A new page state "volatile" is introduced that is used for clean, uptodate page cache pages. The host can choose to discard volatile pages as part of its vmscan operatio...