[PATCH for vm-scalability] usemem: Output a message after punch holes done

From: Hui Zhu When I use punch holes to setup a test page fragmentation environment, I didn't know when the punch holes done. I can only get this information through top or something else. This commit add code to output a message after punch holes done to handle this issue. Signed-off-by

[PATCH for vm-scalability] usemem: Add code for touch-alloc

Add code for touch-alloc. And Change read memory to write memory to avoid use the zero-page for reads in do_anonymous_page. Signed-off-by: Hui Zhu --- usemem.c | 34 ++ 1 file changed, 22 insertions(+), 12 deletions(-) diff --git a/usemem.c b/usemem.c index

[PATCH] usemem: Remove the duplicate do_access

From: Hui Zhu Got following error when build usemem: gcc -O -c -Wall -g usemem.c -o usemem.o usemem.c:451:15: error: redefinition of ‘do_access’ unsigned long do_access(unsigned long *p, unsigned long idx, int read) ^ usemem.c:332:15: note: previous definition of

[PATCH] usemem: Add option touch-alloc

Some environment will not fault in memory even if MAP_POPULATE is set. This commit add option touch-alloc to read memory after allocate it to make sure the pages is fault in. Signed-off-by: Hui Zhu --- usemem.c | 37 + 1 file changed, 25 insertions(+), 12

[PATCH] usemem: Add option init-time

From: Hui Zhu This commit add a new option init-time to remove the initialization time from the run time and show the initialization time. Signed-off-by: Hui Zhu --- usemem.c | 29 +++-- 1 file changed, 27 insertions(+), 2 deletions(-) diff --git a/usemem.c b/usemem.c

[PATCH] samples/bpf/Makefile: Create tools/testing/selftests/bpf dir

From: Hui Zhu Got an error when I built samples/bpf in a separate directory: make O=../bk/ defconfig make -j64 bzImage make headers_install make V=1 M=samples/bpf ... ... make -C /home/teawater/kernel/linux/samples/bpf/../..//tools/build CFLAGS= LDFLAGS= fixdep make -f /home/teawater/kernel

[RFC for qemu v4 2/2] virtio_balloon: Add dcvq to deflate continuous pages

This commit adds a vq dcvq to deflate continuous pages. When VIRTIO_BALLOON_F_CONT_PAGES is set, try to get continuous pages from icvq and use madvise MADV_WILLNEED with the pages. Signed-off-by: Hui Zhu --- hw/virtio/virtio-balloon.c | 14 +- include/hw/virtio/virtio

[RFC for Linux v4 1/2] virtio_balloon: Add VIRTIO_BALLOON_F_CONT_PAGES and inflate_cont_vq

This commit adds a new flag VIRTIO_BALLOON_F_CONT_PAGES to virtio_balloon. Add it adds a vq inflate_cont_vq to inflate continuous pages. When VIRTIO_BALLOON_F_CONT_PAGES is set, try to allocate continuous pages and report them use inflate_cont_vq. Signed-off-by: Hui Zhu --- drivers/virtio

[RFC for qemu v4 0/2] virtio-balloon: Add option cont-pages to set VIRTIO_BALLOON_F_CONT_PAGES

two benefits: 1. Increase the speed of balloon inflate and deflate. 2. Decrease the splitted THPs number in the host. [1] https://github.com/teawater/linux/tree/balloon_conts [2] https://github.com/teawater/qemu/tree/balloon_conts [3] https://lkml.org/lkml/2020/5/13/1211 Hui Zhu (2

[RFC for Linux v4 0/2] virtio_balloon: Add VIRTIO_BALLOON_F_CONT_PAGES to report continuous pages

kml/2020/5/12/324 [4] https://github.com/teawater/linux/tree/balloon_conts [5] https://github.com/teawater/qemu/tree/balloon_conts [6] https://lkml.org/lkml/2020/5/13/1211 Hui Zhu (2): virtio_balloon: Add VIRTIO_BALLOON_F_CONT_PAGES and inflate_cont_vq virtio_balloon: Add deflate_cont_vq to

[RFC for qemu v4 1/2] virtio_balloon: Add cont-pages and icvq

the pages. Signed-off-by: Hui Zhu --- hw/virtio/virtio-balloon.c | 80 - include/hw/virtio/virtio-balloon.h | 2 +- include/standard-headers/linux/virtio_balloon.h | 1 + 3 files changed, 55 insertions(+), 28 deletions(-) diff --git a

[RFC for Linux v4 2/2] virtio_balloon: Add deflate_cont_vq to deflate continuous pages

: Hui Zhu --- drivers/virtio/virtio_balloon.c| 73 include/linux/balloon_compaction.h | 3 ++ mm/balloon_compaction.c| 76 ++ 3 files changed, 144 insertions(+), 8 deletions(-) diff --git a/drivers/virtio

[RFC v3 for QEMU] virtio-balloon: Add option cont-pages to set VIRTIO_BALLOON_VQ_INFLATE_CONT

get continuous pages PFN that its order is current_pages_order from VQ ivq use use madvise MADV_DONTNEED release the page. This will handle the THP split issue. Signed-off-by: Hui Zhu --- hw/virtio/virtio-balloon.c | 77 + include/hw/virtio/virtio

[RFC v3 for Linux] virtio_balloon: Add VIRTIO_BALLOON_VQ_INFLATE_CONT to handle THP split issue

age. [1] https://lkml.org/lkml/2020/3/12/144 [2] https://lore.kernel.org/linux-mm/1584893097-12317-1-git-send-email-teawa...@gmail.com/ Signed-off-by: Hui Zhu --- drivers/virtio/virtio_balloon.c | 98 +++-- include/linux/balloon_compaction.h | 9 +++- incl

[PATCH 1/2] mm, frontswap: Fix frontswap_map issue with THP

. Signed-off-by: Hui Zhu --- mm/frontswap.c | 8 ++-- 1 file changed, 6 insertions(+), 2 deletions(-) diff --git a/mm/frontswap.c b/mm/frontswap.c index 60bb20e..f07ea63 100644 --- a/mm/frontswap.c +++ b/mm/frontswap.c @@ -274,8 +274,12 @@ int __frontswap_store(struct page *page

[PATCH 2/2] mm, zswap: Support THP

This commit let zswap treats THP as continuous normal pages in zswap_frontswap_store. It will store them to a lot of "zswap_entry". These "zswap_entry" will be inserted to "zswap_tree" together. Signed-off-by:

[RFC v4] zswap: Add CONFIG_ZSWAP_IO_SWITCH to handle swap IO issue

enabled by the swap parameter io_switch_enabled_enabled, zswap will just work when the swap disk has outstanding I/O requests. [1] https://lkml.org/lkml/2019/9/11/935 [2] https://lkml.org/lkml/2019/9/20/90 [3] https://lkml.org/lkml/2019/9/22/927 Signed-off-by: Hui Zhu --- include/linux/swap.h |

[RFC v3] zswap: Add CONFIG_ZSWAP_IO_SWITCH to handle swap IO issue

/2019/9/20/90 [3] https://lkml.org/lkml/2019/9/20/1076 Signed-off-by: Hui Zhu --- include/linux/swap.h | 3 +++ mm/Kconfig | 18 mm/page_io.c | 16 +++ mm/zswap.c | 58 4 files changed

[RFC v2] zswap: Add CONFIG_ZSWAP_IO_SWITCH to handle swap IO issue

will be stored to zswap only when the IO in flight number of swap device is bigger than zswap_read_in_flight_limit or zswap_write_in_flight_limit when zswap is enabled. Then the zswap just work when the IO in flight number of swap device is low. Signed-off-by: Hui Zhu --- include/linux/swap.h

[PATCH for vm-scalability] usemem: Add new option -Z|--read-again

usemem will read memory again after access the memory with this option. It can help test the speed that load page from swap to memory. Signed-off-by: Hui Zhu --- usemem.c | 46 -- 1 file changed, 40 insertions(+), 6 deletions(-) diff --git a/usemem.c

[PATCH] zswap: Add CONFIG_ZSWAP_IO_SWITCH

55716864 bytes / 14457505 usecs = 571159 KB/s 365961 usecs to free memory Signed-off-by: Hui Zhu --- include/linux/swap.h | 3 +++ mm/Kconfig | 11 +++ mm/page_io.c | 16 +++ mm/zswap.c | 55 4 fi

[PATCH V3 2/2] zswap: Use movable memory if zpool support allocate movable memory

ge blocks is decreased when the kernel has this commit. Signed-off-by: Hui Zhu --- mm/zswap.c | 8 +--- 1 file changed, 5 insertions(+), 3 deletions(-) diff --git a/mm/zswap.c b/mm/zswap.c index a4e4d36ec085..c6bf92bf5890 100644 --- a/mm/zswap.c +++ b/mm/zswap.c @@ -1006,6 +1006,7 @@ static int

[PATCH V3 1/2] zpool: Add malloc_support_movable to zpool_driver

zpool_malloc_support_movable check malloc_support_movable to make sure if a zpool support allocate movable memory. Signed-off-by: Hui Zhu --- include/linux/zpool.h | 3 +++ mm/zpool.c| 16 mm/zsmalloc.c | 19 ++- 3 files changed, 29 insertions(+), 9 deletions

Re: [PATCH V2 2/2] zswap: Add module parameter malloc_movable_if_support

Shakeel Butt 于2019年6月5日周三 上午1:12写道： > > On Sun, Jun 2, 2019 at 2:47 AM Hui Zhu wrote: > > > > This is the second version that was updated according to the comments > > from Sergey Senozhatsky in https://lkml.org/lkml/2019/5/29/73 > > > > zswap compresses swa

[PATCH V2 2/2] zswap: Add module parameter malloc_movable_if_support

0 00 You can see that the number of unmovable page blocks is decreased when malloc_movable_if_support is enabled. Signed-off-by: Hui Zhu --- mm/zswap.c | 16 +--- 1 file changed, 13 insertions(+), 3 deletions(-) diff --git a/mm/zswap.c b/mm/zswap.c index

[PATCH V2 1/2] zpool: Add malloc_support_movable to zpool_driver

zpool_malloc_support_movable check malloc_support_movable to make sure if a zpool support allocate movable memory. Signed-off-by: Hui Zhu --- include/linux/zpool.h | 3 +++ mm/zpool.c| 16 mm/zsmalloc.c | 19 ++- 3 files changed, 29 insertions(+), 9 deletions

[UPSTREAM KERNEL] mm/zsmalloc.c: Add module parameter malloc_force_movable

n see that the number of unmovable page blocks is decreased when malloc_force_movable is enabled. Signed-off-by: Hui Zhu --- mm/zsmalloc.c | 10 ++ 1 file changed, 10 insertions(+) diff --git a/mm/zsmalloc.c b/mm/zsmalloc.c index 0787d33b80d8..7d44c7ccd882 100644 --- a/mm/zsmall

[RFC 2/4] BloodTest: perf

_config", "perf_freq", "perf_period", "perf_type" can set the options of perf. After record, access "str" will get the record data in string. Access "cpu0/page" will get the record data in binary that is format is in "bin_format". Signed-off-by:

[RFC 0/4] BloodTest: kernel status

overhead and full coverage. BloodTest is for it. It is a interface can acess function of other analysing tools and records to internal buffer that user or application can access very quickly (mmap). Now, BloodTest just support record cpu, perf and task infomation in one seconds. Hui Zhu (2

[RFC 1/4] BloodTest: kernel status

cord. bt_insert and bt_pullout will call analysing tools. Signed-off-by: Hui Zhu --- fs/proc/stat.c | 8 +-- include/linux/kernel_stat.h| 3 ++ init/Kconfig | 3 ++ kernel/Makefile| 2 + kernel/bloodtest/Makefile | 1 + kernel/bloodtest

[RFC 4/4] BloodTest: task

fomation. After record, access "str" will get the record data in string. Access "page" will get the record data in binary that is format is in "bin_format". Signed-off-by: Hui Zhu --- include/linux/bloodtest.h | 10 + kernel/bloodtest/Makefile | 2 +- kernel/blood

[RFC 3/4] module: add /proc/modules_update_version

le, it also need the address of modules from /proc/modules. Add /proc/modules_update_version will help the application to get if the kernel modules address is changed or not. Signed-off-by: Hui Zhu --- kernel/module.c | 19 +++ 1 file changed, 19 insertions(+) diff --git a/kern

Re: [RFC 0/2] Use HighAtomic against long-term fragmentation

2017-09-26 17:51 GMT+08:00 Mel Gorman : > On Tue, Sep 26, 2017 at 04:46:42PM +0800, Hui Zhu wrote: >> Current HighAtomic just to handle the high atomic page alloc. >> But I found that use it handle the normal unmovable continuous page >> alloc will help to against lo

[RFC 1/2] Try to use HighAtomic if try to alloc umovable page that order is not 0

The page add a new condition to let gfp_to_alloc_flags return alloc_flags with ALLOC_HARDER if the order is not 0 and migratetype is MIGRATE_UNMOVABLE. Then alloc umovable page that order is not 0 will try to use HighAtomic. Signed-off-by: Hui Zhu --- mm/page_alloc.c | 6 -- 1 file changed

[RFC 2/2] Change limit of HighAtomic from 1% to 10%

pageblocks. Signed-off-by: Hui Zhu --- mm/page_alloc.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/mm/page_alloc.c b/mm/page_alloc.c index b54e94a..9322458 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -2101,7 +2101,7 @@ static void reserve_highatomic_pageblock(struct p

[RFC 0/2] Use HighAtomic against long-term fragmentation

local faults 0 0 NUMA hint local percent100 100 NUMA pages migrated 0 0 AutoNUMA cost 0% 0% Hui Zhu (2): Try to use HighAtomic if try to alloc umovable page that order is not 0 Change limit of

Re: [PATCH v2] zsmalloc: zs_page_migrate: schedule free_work if zspage is ZS_EMPTY

2017-08-16 12:51 GMT+08:00 Minchan Kim : > On Wed, Aug 16, 2017 at 10:49:14AM +0800, Hui Zhu wrote: >> Hi Minchan, >> >> 2017-08-16 10:13 GMT+08:00 Minchan Kim : >> > Hi Hui, >> > >> > On Mon, Aug 14, 2017 at 05:56:30PM +0800, Hui Zhu w

[PATCH] zsmalloc: zs_page_isolate: skip unnecessary loops but not return false if zspage is not inuse

-not-return-ebusy-if-zspage-is-not-inuse-fix.patch [2] zsmalloc-zs_page_migrate-schedule-free_work-if-zspage-is-ZS_EMPTY.patch Signed-off-by: Hui Zhu --- mm/zsmalloc.c | 5 - 1 file changed, 5 deletions(-) diff --git a/mm/zsmalloc.c b/mm/zsmalloc.c index fb99953..8560c93 100644 --- a/mm

[PATCH v3] zsmalloc: zs_page_migrate: schedule free_work if zspage is ZS_EMPTY

se zs_page_migrate done the job without "schedule_work(&pool->free_work);" Make this patch let zs_page_migrate wake up free_work if need. [1] zsmalloc-zs_page_migrate-skip-unnecessary-loops-but-not-return-ebusy-if-zspage-is-not-inuse-fix.patch Signed-off-by: Hui Zhu --- mm/zs

Re: [PATCH v2] zsmalloc: zs_page_migrate: schedule free_work if zspage is ZS_EMPTY

Hi Minchan, 2017-08-16 10:13 GMT+08:00 Minchan Kim : > Hi Hui, > > On Mon, Aug 14, 2017 at 05:56:30PM +0800, Hui Zhu wrote: >> After commit e2846124f9a2 ("zsmalloc: zs_page_migrate: skip unnecessary > > This patch is not merged yet so the hash is invalid. > That means

[PATCH v2] zsmalloc: zs_page_migrate: schedule free_work if zspage is ZS_EMPTY

p;pool->free_work);" Make this patch let zs_page_migrate wake up free_work if need. Fixes: e2846124f9a2 ("zsmalloc: zs_page_migrate: skip unnecessary loops but not return -EBUSY if zspage is not inuse") Signed-off-by: Hui Zhu --- mm/zsmalloc.c | 13 +++-- 1 file changed

Re: [PATCH] zsmalloc: zs_page_migrate: schedule free_work if zspage is ZS_EMPTY

2017-08-14 16:31 GMT+08:00 Minchan Kim : > Hi Hui, > > On Mon, Aug 14, 2017 at 02:34:46PM +0800, Hui Zhu wrote: >> After commit e2846124f9a2 ("zsmalloc: zs_page_migrate: skip unnecessary >> loops but not return -EBUSY if zspage is not inuse") zs_page_migrate &g

[PATCH] zsmalloc: zs_page_migrate: schedule free_work if zspage is ZS_EMPTY

her zspage wake up free_work. Make this patch let zs_page_migrate wake up free_work if need. Fixes: e2846124f9a2 ("zsmalloc: zs_page_migrate: skip unnecessary loops but not return -EBUSY if zspage is not inuse") Signed-off-by: Hui Zhu --- mm/zsmalloc.c | 10 -- 1 file changed

[PATCH] zsmalloc: zs_page_migrate: skip unnecessary loops but not return -EBUSY if zspage is not inuse

/21/10 Signed-off-by: Hui Zhu --- mm/zsmalloc.c | 9 ++--- 1 file changed, 6 insertions(+), 3 deletions(-) diff --git a/mm/zsmalloc.c b/mm/zsmalloc.c index d41edd2..c2c7ba9 100644 --- a/mm/zsmalloc.c +++ b/mm/zsmalloc.c @@ -1997,8 +1997,11 @@ int zs_page_migrate(struct address_space *mapping

Re: [PATCH] zsmalloc: zs_page_migrate: not check inuse if migrate_mode is not MIGRATE_ASYNC

2017-07-20 16:47 GMT+08:00 Minchan Kim : > Hi Hui, > > On Thu, Jul 20, 2017 at 02:39:17PM +0800, Hui Zhu wrote: >> Hi Minchan, >> >> I am sorry for answer late. >> I spent some time on ubuntu 16.04 with mmtests in an old laptop. >> >> 2017-07-17

Re: [PATCH] zsmalloc: zs_page_migrate: not check inuse if migrate_mode is not MIGRATE_ASYNC

Hi Minchan, I am sorry for answer late. I spent some time on ubuntu 16.04 with mmtests in an old laptop. 2017-07-17 13:39 GMT+08:00 Minchan Kim : > Hello Hui, > > On Fri, Jul 14, 2017 at 03:51:07PM +0800, Hui Zhu wrote: >> Got some -EBUSY from zs_page_migrate that will make mi

[PATCH] zsmalloc: zs_page_migrate: not check inuse if migrate_mode is not MIGRATE_ASYNC

se if migrate_mode is not MIGRATE_ASYNC. Signed-off-by: Hui Zhu --- mm/zsmalloc.c | 66 +-- 1 file changed, 37 insertions(+), 29 deletions(-) diff --git a/mm/zsmalloc.c b/mm/zsmalloc.c index d41edd2..c298e5c 100644 --- a/mm/zsmalloc.c +++

[RFC 0/2] Add interface let ZRAM close swap cache

1126484928 bytes / 6555923 usecs = 167799 KB/s 1126484928 bytes / 6642291 usecs = 165617 KB/s Hui Zhu (2): SWAP: add interface to let disk close swap cache ZRAM: add sysfs switch swap_cache_not_keep

[RFC 1/2] SWAP: add interface to let disk close swap cache

This patch add a interface to gendisk that SWAP device can use it to control the swap cache rule. Signed-off-by: Hui Zhu --- include/linux/genhd.h | 3 +++ include/linux/swap.h | 8 ++ mm/Kconfig| 10 +++ mm/memory.c | 2 +- mm/swapfile.c | 74

[RFC 2/2] ZRAM: add sysfs switch swap_cache_not_keep

This patch add a sysfs interface swap_cache_not_keep to control the swap cache rule for a ZRAM disk. Swap will not keep the swap cache anytime if it set to 1. Signed-off-by: Hui Zhu --- drivers/block/zram/zram_drv.c | 34 ++ 1 file changed, 34 insertions(+) diff

Re: [RFC 0/4] ZRAM: make it just store the high compression rate page

On Mon, Sep 5, 2016 at 1:51 PM, Minchan Kim wrote: > On Mon, Sep 05, 2016 at 01:12:05PM +0800, Hui Zhu wrote: >> On Mon, Sep 5, 2016 at 10:18 AM, Minchan Kim wrote: >> > On Thu, Aug 25, 2016 at 04:25:30PM +0800, Hui Zhu wrote: >> >> On Thu, Aug 25, 2016

Re: [RFC 0/4] ZRAM: make it just store the high compression rate page

On Mon, Sep 5, 2016 at 10:18 AM, Minchan Kim wrote: > On Thu, Aug 25, 2016 at 04:25:30PM +0800, Hui Zhu wrote: >> On Thu, Aug 25, 2016 at 2:09 PM, Sergey Senozhatsky >> wrote: >> > Hello, >> > >> > On (08/22/16 16:25), Hui Zhu wrote: >> >> &

Re: [RFC 0/4] ZRAM: make it just store the high compression rate page

On Thu, Aug 25, 2016 at 2:09 PM, Sergey Senozhatsky wrote: > Hello, > > On (08/22/16 16:25), Hui Zhu wrote: >> >> Current ZRAM just can store all pages even if the compression rate >> of a page is really low. So the compression rate of ZRAM is out of >> control

Re: [RFC 0/4] ZRAM: make it just store the high compression rate page

Hi Minchan, On Wed, Aug 24, 2016 at 9:04 AM, Minchan Kim wrote: > Hi Hui, > > On Mon, Aug 22, 2016 at 04:25:05PM +0800, Hui Zhu wrote: >> Current ZRAM just can store all pages even if the compression rate >> of a page is really low. So the compression rate of ZRAM is out

[RFC 0/4] ZRAM: make it just store the high compression rate page

the page that the compressed size is smaller than a value. With these patches, I set the value to 2048 and did the same test with before. The compression rate is about 20%. The times of lowmemorykiller also decreased. Hui Zhu (4): vmscan.c: shrink_page_list: unmap anon pages after pageout Add non

[RFC 3/4] ZRAM: do not swap the page that compressed size bigger than non_swap

New option ZRAM_NON_SWAP add a interface "non_swap" to zram. User can set a unsigned int value to zram. If a page that compressed size is bigger than limit, mark it as non-swap. Then this page will add to unevictable lru list. This patch doesn't handle the shmem file pages. Sig

[RFC 2/4] Add non-swap page flag to mark a page will not swap

After a page marked non-swap flag in swap driver, it will add to unevictable lru list. This page will be kept in this status before its data changed. Signed-off-by: Hui Zhu --- fs/proc/meminfo.c | 6 ++ include/linux/mm_inline.h | 20 ++-- include/linux

[RFC 1/4] vmscan.c: shrink_page_list: unmap anon pages after pageout

ge is shmem file page. Then I separate code of shmem file pages to last patch of this series. Signed-off-by: Hui Zhu --- include/linux/rmap.h | 5 mm/Kconfig | 4 +++ mm/page_io.c | 11 --- mm/rmap.c| 28 ++ mm/vmscan.c

[RFC 4/4] vmscan.c: zram: add non swap support for shmem file pages

This patch add the whole support for shmem file pages non swap. To make sure a page is shmem file page, check mapping->a_ops == &shmem_aops. I think it is really a hack way. There are not a lot of shmem file pages will be swapped out. Signed-off-by: Hui Zhu --- drivers/block/zram/zra

[PATCH 2/3] zsmalloc: make its page "PageMobile"

The idea of this patch is same with prev version [1]. But it use the migration frame in [1]. [1] http://comments.gmane.org/gmane.linux.kernel.mm/140014 [2] https://lkml.org/lkml/2015/7/7/21 Signed-off-by: Hui Zhu --- mm/zsmalloc.c | 214

[PATCH v3 0/3] zsmalloc: make its pages can be migrated

These patches updated according to the review for the prev version [1]. So they are based on "[RFCv3 0/5] enable migration of driver pages" [2] and "[RFC zsmalloc 0/4] meta diet" [3]. Hui Zhu (3): zsmalloc: make struct can move zsmalloc: mark its page "PageMobile" zr

[PATCH 1/3] zsmalloc: make struct can be migrated

kml/2015/8/10/90 [2] https://lkml.org/lkml/2015/7/7/21 Signed-off-by: Hui Zhu --- mm/zsmalloc.c | 178 ++ 1 file changed, 104 insertions(+), 74 deletions(-) diff --git a/mm/zsmalloc.c b/mm/zsmalloc.c index 1b18144..57c91a5 100644 --- a/mm/

[PATCH 3/3] zram: make create "__GFP_MOVABLE" pool

Change the flags when call zs_create_pool to make zram alloc movable zsmalloc page. Signed-off-by: Hui Zhu --- drivers/block/zram/zram_drv.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/block/zram/zram_drv.c b/drivers/block/zram/zram_drv.c index 9fa15bb

Re: [RFC v2 1/3] migrate: new struct migration and add it to struct page

On Thu, Oct 15, 2015 at 5:53 PM, Minchan Kim wrote: > On Thu, Oct 15, 2015 at 11:27:15AM +0200, Vlastimil Babka wrote: >> On 10/15/2015 11:09 AM, Hui Zhu wrote: >> >I got that add function interfaces is really not a good idea. >> >So I add a new struct migration to p

Re: [PATCH] zsmalloc: remove unless line in obj_free

Thanks. I will post a new version later. Best, Hui On Tue, Oct 13, 2015 at 4:00 PM, Sergey Senozhatsky wrote: > On (10/13/15 14:31), Hui Zhu wrote: >> Signed-off-by: Hui Zhu > > s/unless/useless/ > > other than that > > Reviewed-by: Sergey Senozhatsky >

[PATCH v2] zsmalloc: remove useless line in obj_free

Signed-off-by: Hui Zhu Reviewed-by: Sergey Senozhatsky --- mm/zsmalloc.c | 3 --- 1 file changed, 3 deletions(-) diff --git a/mm/zsmalloc.c b/mm/zsmalloc.c index f135b1b..c7338f0 100644 --- a/mm/zsmalloc.c +++ b/mm/zsmalloc.c @@ -1428,8 +1428,6 @@ static void obj_free(struct zs_pool *pool

[PATCH] zsmalloc: remove unless line in obj_free

Signed-off-by: Hui Zhu --- mm/zsmalloc.c | 3 --- 1 file changed, 3 deletions(-) diff --git a/mm/zsmalloc.c b/mm/zsmalloc.c index f135b1b..c7338f0 100644 --- a/mm/zsmalloc.c +++ b/mm/zsmalloc.c @@ -1428,8 +1428,6 @@ static void obj_free(struct zs_pool *pool, struct size_class *class

[PATCH v2] zsmalloc: fix obj_to_head use page_private(page) as value but not pointer

reason why there is no problem until now is huge-class page is born with ZS_FULL so it couldn't be migrated. Therefore, it shouldn't be real bug in practice. However, we need this patch for future-work "VM-aware zsmalloced page migration" to reduce external fragmentation. Sign

Re: [PATCH] zsmalloc: fix obj_to_head use page_private(page) as value but not pointer

On Tue, Oct 6, 2015 at 9:54 PM, Minchan Kim wrote: > Hello, > > On Mon, Oct 05, 2015 at 04:23:01PM +0800, Hui Zhu wrote: >> In function obj_malloc: >> if (!class->huge) >> /* record handle in the header of allocated chunk */ >>

[PATCH] zsmalloc: fix obj_to_head use page_private(page) as value but not pointer

use page_private(page) as value but not pointer in obj_to_head. Signed-off-by: Hui Zhu --- mm/zsmalloc.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/mm/zsmalloc.c b/mm/zsmalloc.c index f135b1b..e881d4f 100644 --- a/mm/zsmalloc.c +++ b/mm/zsmalloc.c @@ -824,7 +824,7 @@ sta

[PATCH v2] zsmalloc: add comments for ->inuse to zspage

Signed-off-by: Hui Zhu --- mm/zsmalloc.c | 1 + 1 file changed, 1 insertion(+) diff --git a/mm/zsmalloc.c b/mm/zsmalloc.c index f135b1b..f62f2fb 100644 --- a/mm/zsmalloc.c +++ b/mm/zsmalloc.c @@ -38,6 +38,7 @@ * page->lru: links together first pages of various zspa

[PATCH] zsmalloc: add comments for ->inuse to zspage

Signed-off-by: Hui Zhu --- mm/zsmalloc.c | 1 + 1 file changed, 1 insertion(+) diff --git a/mm/zsmalloc.c b/mm/zsmalloc.c index f135b1b..1f66d5b 100644 --- a/mm/zsmalloc.c +++ b/mm/zsmalloc.c @@ -38,6 +38,7 @@ * page->lru: links together first pages of various zspa

Call for Topics and Sponsors

* Call for Topics and Sponsors Workshop on Open Source Development Tools 2015 Beijing, China Sep. 12, 2015 (TBD) HelloGCC Work Group (www.hellogcc.org) *

Re: [PATCH v2] CMA: page_isolation: check buddy before access it

On Wed, May 6, 2015 at 2:28 PM, Joonsoo Kim wrote: > On Tue, May 05, 2015 at 11:22:59AM +0800, Hui Zhu wrote: >> Change pfn_present to pfn_valid_within according to the review of Laura. >> >> I got a issue: >> [ 214.294917] Unable to handle kernel NULL pointer derefer

[PATCH v3] CMA: page_isolation: check buddy before access it

if (!is_migrate_isolate_page(buddy)) { But the begin addr of this part of CMA memory is very close to a part of memory that is reserved in the boot time (not in buddy system). So add a check before access it. Suggested-by: Laura Abbott Suggested-by: Joonsoo Kim Signed-off-by: Hui Zhu --- mm/page_is

Re: [PATCH v2] CMA: page_isolation: check buddy before access it

On Wed, May 6, 2015 at 5:29 AM, Andrew Morton wrote: > On Tue, 5 May 2015 11:22:59 +0800 Hui Zhu wrote: > >> Change pfn_present to pfn_valid_within according to the review of Laura. >> >> I got a issue: >> [ 214.294917] Unable to handle kernel NULL pointer dere

[PATCH v2] CMA: page_isolation: check buddy before access it

emory is very close to a part of memory that is reserved in the boot time (not in buddy system). So add a check before access it. Signed-off-by: Hui Zhu --- mm/page_isolation.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/mm/page_isolation.c b/mm/page_isolation.c index 755

Re: [PATCH] CMA: page_isolation: check buddy before access it

On Tue, May 5, 2015 at 2:34 AM, Laura Abbott wrote: > On 05/04/2015 02:41 AM, Hui Zhu wrote: >> >> I got a issue: >> [ 214.294917] Unable to handle kernel NULL pointer dereference at virtual >> address 082a >> [ 214.303013] pgd = cc97 >>

[PATCH] CMA: page_isolation: check buddy before access it

(not in buddy system). So add a check before access it. Signed-off-by: Hui Zhu --- mm/page_isolation.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/mm/page_isolation.c b/mm/page_isolation.c index 755a42c..434730b 100644 --- a/mm/page_isolation.c +++ b/mm/page_isolation.c @@

Re: [PATCH] CMA: treat free cma pages as non-free if not ALLOC_CMA on watermark checking

On Mon, Jan 19, 2015 at 2:55 PM, Minchan Kim wrote: > Hello, > > On Sun, Jan 18, 2015 at 04:32:59PM +0800, Hui Zhu wrote: >> From: Hui Zhu >> >> The original of this patch [1] is part of Joonsoo's CMA patch series. >> I made a patch [2] to fix the iss

Re: [PATCH] mm/page_alloc: Fix race conditions on getting migratetype in buffered_rmqueue

On Sun, Jan 18, 2015 at 6:19 PM, Vlastimil Babka wrote: > On 18.1.2015 10:17, Hui Zhu wrote: >> >> From: Hui Zhu >> >> To test the patch [1], I use KGTP and a script [2] to show >> NR_FREE_CMA_PAGES >> and gross of cma_nr_free. The values are always not s

[PATCH] mm/page_alloc: Fix race conditions on getting migratetype in buffered_rmqueue

From: Hui Zhu To test the patch [1], I use KGTP and a script [2] to show NR_FREE_CMA_PAGES and gross of cma_nr_free. The values are always not same. I check the code of pages alloc and free and found that race conditions on getting migratetype in buffered_rmqueue. Then I add move the code of

[PATCH] CMA: treat free cma pages as non-free if not ALLOC_CMA on watermark checking

From: Hui Zhu The original of this patch [1] is part of Joonsoo's CMA patch series. I made a patch [2] to fix the issue of this patch. Joonsoo reminded me that this issue affect current kernel too. So made a new one for upstream. Current code treat free cma pages as non-free if not ALLO

Re: [PATCH] CMA: Fix CMA's page number is substructed twice in __zone_watermark_ok

On Wed, Jan 7, 2015 at 4:45 PM, Vlastimil Babka wrote: > On 12/30/2014 11:17 AM, Hui Zhu wrote: >> The original of this patch [1] is used to fix the issue in Joonsoo's CMA >> patch >> "CMA: always treat free cma pages as non-free on watermark checking" [2].

[PATCH] samples: hw_breakpoint: check the return value of kallsyms_lookup_name

data_breakpoint.ko can insert successful but cannot catch any change of the data in my part because kallsyms_lookup_name rerurn 0 each time. So add code to check the return value of kallsyms_lookup_name. Signed-off-by: Hui Zhu --- samples/hw_breakpoint/data_breakpoint.c | 17

[PATCH] CMA: Fix CMA's page number is substructed twice in __zone_watermark_ok

f this order is substructed twice. This bug will make __zone_watermark_ok return more false. This patch add cma_free_area to struct free_area that just record the number of CMA pages. And add it back in the order loop to handle the substruct twice issue. [1] https://lkml.org/lkml/2014/12/25/43 [2] h

Re: [PATCH 1/3] CMA: Fix the bug that CMA's page number is substructed twice

On Tue, Dec 30, 2014 at 12:48 PM, Joonsoo Kim wrote: > On Thu, Dec 25, 2014 at 05:43:26PM +0800, Hui Zhu wrote: >> In Joonsoo's CMA patch "CMA: always treat free cma pages as non-free on >> watermark checking" [1], it changes __zone_watermark_ok to substruct CMA >

[PATCH 0/3] CMA: Handle the issues of aggressively allocate the

patches to handle the issues. And I merged cma_alloc_counter from [2] to cma_alloc work better. This patchset is based on aa39477b5692611b91ac9455ae588738852b3f60 and [1]. [1] https://lkml.org/lkml/2014/5/28/64 [2] https://lkml.org/lkml/2014/10/15/623 Hui Zhu (3): CMA: Fix the bug that CMA's

[PATCH 3/3] CMA: Add cma_alloc_counter to make cma_alloc work better if it meet busy range

__rmqueue doesn't call __rmqueue_cma when cma_alloc works. [1] https://lkml.org/lkml/2014/10/24/26 Signed-off-by: Hui Zhu --- include/linux/cma.h | 2 ++ mm/cma.c| 6 ++ mm/page_alloc.c | 8 +++- 3 files changed, 15 insertions(+), 1 deletion(-) diff --git a/include/

[PATCH 1/3] CMA: Fix the bug that CMA's page number is substructed twice

e substruct twice issue. [1] https://lkml.org/lkml/2014/5/28/110 Signed-off-by: Hui Zhu Signed-off-by: Weixing Liu --- include/linux/mmzone.h | 3 +++ mm/page_alloc.c| 29 - 2 files changed, 31 insertions(+), 1 deletion(-) diff --git a/include/linux/mmzone.h b

[PATCH 2/3] CMA: Fix the issue that nr_try_movable just count MIGRATE_MOVABLE memory

the others. This device allocated a lot of MIGRATE_UNMOVABLE memory affect the behavior of this zone memory allocation. This patch change __rmqueue to let nr_try_movable record all the memory allocation of normal memory. [1] https://lkml.org/lkml/2014/5/28/64 Signed-off-by: Hui Zhu Signed-off-

Re: [PATCH 4/4] (CMA_AGGRESSIVE) Update page alloc function

On Fri, Oct 24, 2014 at 1:28 PM, Joonsoo Kim wrote: > On Thu, Oct 16, 2014 at 11:35:51AM +0800, Hui Zhu wrote: >> If page alloc function __rmqueue try to get pages from MIGRATE_MOVABLE and >> conditions (cma_alloc_counter, cma_aggressive_free_min, cma_alloc_counter) >> allow

Re: [PATCH 0/4] (CMA_AGGRESSIVE) Make CMA memory be more aggressive about allocation

On Tue, Nov 4, 2014 at 3:53 PM, Minchan Kim wrote: > Hello, > > On Wed, Oct 29, 2014 at 03:43:33PM +0100, Vlastimil Babka wrote: >> On 10/16/2014 10:55 AM, Laura Abbott wrote: >> >On 10/15/2014 8:35 PM, Hui Zhu wrote: >> > >> >It's good to see anoth

Re: [PATCH 0/4] (CMA_AGGRESSIVE) Make CMA memory be more aggressive about allocation

On Wed, Oct 29, 2014 at 10:43 PM, Vlastimil Babka wrote: > On 10/16/2014 10:55 AM, Laura Abbott wrote: >> >> On 10/15/2014 8:35 PM, Hui Zhu wrote: >> >> It's good to see another proposal to fix CMA utilization. Do you have >> any data about the success r

Re: [PATCH v5 2/4] mm/page_alloc: add freepage on isolate pageblock to correct buddy list

On Mon, Nov 3, 2014 at 4:22 PM, Heesub Shin wrote: > Hello, > > > On 10/31/2014 04:25 PM, Joonsoo Kim wrote: >> >> In free_pcppages_bulk(), we use cached migratetype of freepage >> to determine type of buddy list where freepage will be added. >> This information is stored when freepage is added to

Re: [PATCH 0/4] (CMA_AGGRESSIVE) Make CMA memory be more aggressive about allocation

On Fri, Oct 24, 2014 at 1:25 PM, Joonsoo Kim wrote: > On Thu, Oct 16, 2014 at 11:35:47AM +0800, Hui Zhu wrote: >> In fallbacks of page_alloc.c, MIGRATE_CMA is the fallback of >> MIGRATE_MOVABLE. >> MIGRATE_MOVABLE will use MIGRATE_CMA when it doesn't have a page in >&

Re: [PATCH v2 2/3] CMA: aggressively allocate the pages on cma reserved memory when not used

On Wed, May 28, 2014 at 3:04 PM, Joonsoo Kim wrote: > CMA is introduced to provide physically contiguous pages at runtime. > For this purpose, it reserves memory at boot time. Although it reserve > memory, this reserved memory can be used for movable memory allocation > request. This usecase is be

[PATCH v2 3/4] (CMA_AGGRESSIVE) Update reserve custom contiguous area code

tiguous area, increase the value of cma_alloc_counter. CMA_AGGRESSIVE will not work in page alloc code. After reserve custom contiguous area function return, decreases the value of cma_alloc_counter. Signed-off-by: Hui Zhu --- include/linux/cma.h | 7 +++ kernel/sysctl.c | 27 ++

[PATCH v2 2/4] (CMA_AGGRESSIVE) Add new function shrink_all_memory_for_cma

Update this patch according to the comments from Rafael. Function shrink_all_memory_for_cma try to free `nr_to_reclaim' of memory. CMA aggressive shrink function will call this functon to free `nr_to_reclaim' of memory. Signed-off-by: Hui Zhu --- mm/vms

[PATCH 0/4] (CMA_AGGRESSIVE) Make CMA memory be more aggressive about allocation

In fallbacks of page_alloc.c, MIGRATE_CMA is the fallback of MIGRATE_MOVABLE. MIGRATE_MOVABLE will use MIGRATE_CMA when it doesn't have a page in order that Linux kernel want. If a system that has a lot of user space program is running, for instance, an Android board, most of memory is in MIGRATE_

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