Re: [PATCH -mm -v9 1/3] mm, THP, swap: Delay splitting THP during swap out

Johannes Weiner writes: > On Fri, Apr 21, 2017 at 04:11:36PM +1000, Balbir Singh wrote: >> > In the future of THP swap optimization, some information of the >> > swapped out THP (such as compound map count) will be recorded in the >> > swap_cluster_info data structure. >> >

Re: [PATCH -mm -v9 1/3] mm, THP, swap: Delay splitting THP during swap out

Johannes Weiner writes: > On Fri, Apr 21, 2017 at 04:11:36PM +1000, Balbir Singh wrote: >> > In the future of THP swap optimization, some information of the >> > swapped out THP (such as compound map count) will be recorded in the >> > swap_cluster_info data structure. >> > >> > The mem cgroup

Re: [PATCH -mm -v9 1/3] mm, THP, swap: Delay splitting THP during swap out

On Fri, Apr 21, 2017 at 04:11:36PM +1000, Balbir Singh wrote: > > In the future of THP swap optimization, some information of the > > swapped out THP (such as compound map count) will be recorded in the > > swap_cluster_info data structure. > > > > The mem cgroup swap accounting functions are

Re: [PATCH -mm -v9 1/3] mm, THP, swap: Delay splitting THP during swap out

On Fri, Apr 21, 2017 at 04:11:36PM +1000, Balbir Singh wrote: > > In the future of THP swap optimization, some information of the > > swapped out THP (such as compound map count) will be recorded in the > > swap_cluster_info data structure. > > > > The mem cgroup swap accounting functions are

Re: [PATCH -mm -v9 1/3] mm, THP, swap: Delay splitting THP during swap out

Balbir Singh writes: > On Wed, 2017-04-19 at 15:06 +0800, Huang, Ying wrote: >> From: Huang Ying >> >> In this patch, splitting huge page is delayed from almost the first >> step of swapping out to after allocating the swap space for the >> THP

Re: [PATCH -mm -v9 1/3] mm, THP, swap: Delay splitting THP during swap out

Balbir Singh writes: > On Wed, 2017-04-19 at 15:06 +0800, Huang, Ying wrote: >> From: Huang Ying >> >> In this patch, splitting huge page is delayed from almost the first >> step of swapping out to after allocating the swap space for the >> THP (Transparent Huge Page) and adding the THP into

Re: [PATCH -mm -v9 1/3] mm, THP, swap: Delay splitting THP during swap out

On Wed, 2017-04-19 at 15:06 +0800, Huang, Ying wrote: > From: Huang Ying > > In this patch, splitting huge page is delayed from almost the first > step of swapping out to after allocating the swap space for the > THP (Transparent Huge Page) and adding the THP into the swap

Re: [PATCH -mm -v9 1/3] mm, THP, swap: Delay splitting THP during swap out

On Wed, 2017-04-19 at 15:06 +0800, Huang, Ying wrote: > From: Huang Ying > > In this patch, splitting huge page is delayed from almost the first > step of swapping out to after allocating the swap space for the > THP (Transparent Huge Page) and adding the THP into the swap cache. > This will

Re: [PATCH -mm -v9 1/3] mm, THP, swap: Delay splitting THP during swap out

Hi, Johannes, Johannes Weiner writes: > On Wed, Apr 19, 2017 at 03:06:23PM +0800, Huang, Ying wrote: >> @@ -206,17 +212,34 @@ int add_to_swap(struct page *page, struct list_head >> *list) >> */ >> err = add_to_swap_cache(page, entry, >>

Re: [PATCH -mm -v9 1/3] mm, THP, swap: Delay splitting THP during swap out

Hi, Johannes, Johannes Weiner writes: > On Wed, Apr 19, 2017 at 03:06:23PM +0800, Huang, Ying wrote: >> @@ -206,17 +212,34 @@ int add_to_swap(struct page *page, struct list_head >> *list) >> */ >> err = add_to_swap_cache(page, entry, >>

Re: [PATCH -mm -v9 1/3] mm, THP, swap: Delay splitting THP during swap out

On Wed, Apr 19, 2017 at 03:06:23PM +0800, Huang, Ying wrote: > @@ -206,17 +212,34 @@ int add_to_swap(struct page *page, struct list_head > *list) >*/ > err = add_to_swap_cache(page, entry, > __GFP_HIGH|__GFP_NOMEMALLOC|__GFP_NOWARN); > - > - if (!err) { > -

Re: [PATCH -mm -v9 1/3] mm, THP, swap: Delay splitting THP during swap out

On Wed, Apr 19, 2017 at 03:06:23PM +0800, Huang, Ying wrote: > @@ -206,17 +212,34 @@ int add_to_swap(struct page *page, struct list_head > *list) >*/ > err = add_to_swap_cache(page, entry, > __GFP_HIGH|__GFP_NOMEMALLOC|__GFP_NOWARN); > - > - if (!err) { > -

[PATCH -mm -v9 1/3] mm, THP, swap: Delay splitting THP during swap out

From: Huang Ying In this patch, splitting huge page is delayed from almost the first step of swapping out to after allocating the swap space for the THP (Transparent Huge Page) and adding the THP into the swap cache. This will batch the corresponding operation, thus improve

[PATCH -mm -v9 1/3] mm, THP, swap: Delay splitting THP during swap out

From: Huang Ying In this patch, splitting huge page is delayed from almost the first step of swapping out to after allocating the swap space for the THP (Transparent Huge Page) and adding the THP into the swap cache. This will batch the corresponding operation, thus improve THP swap out