search for: page_to_nid

...fio 4KB randread benchmark results do not show a significant improvement: > > > > Name IOPS Error > > virtio-blk 42373.79 =C2=B1 0.54% > > virtio-blk-numa 42517.07 =C2=B1 0.79% > > > I remember I did something similar in vhost by using page_to_nid() for > descriptor ring. And I get little improvement as shown here. > > Michael reminds that it was probably because all data were cached. So I > doubt if the test lacks sufficient stress on the cache ... Yes, that sounds likely. If there's no real-world performance improvement t...

...fio 4KB randread benchmark results do not show a significant improvement: > > > > Name IOPS Error > > virtio-blk 42373.79 =C2=B1 0.54% > > virtio-blk-numa 42517.07 =C2=B1 0.79% > > > I remember I did something similar in vhost by using page_to_nid() for > descriptor ring. And I get little improvement as shown here. > > Michael reminds that it was probably because all data were cached. So I > doubt if the test lacks sufficient stress on the cache ... Yes, that sounds likely. If there's no real-world performance improvement t...

...ci device is located. > > The fio 4KB randread benchmark results do not show a significant improvement: > > Name IOPS Error > virtio-blk 42373.79 =C2=B1 0.54% > virtio-blk-numa 42517.07 =C2=B1 0.79% I remember I did something similar in vhost by using page_to_nid() for descriptor ring. And I get little improvement as shown here. Michael reminds that it was probably because all data were cached. So I doubt if the test lacks sufficient stress on the cache ... Thanks > > Stefan Hajnoczi (3): > virtio-pci: use NUMA-aware memory allocation in p...

...do not show a significant improvement: > > > > > > Name IOPS Error > > > virtio-blk 42373.79 =C2=B1 0.54% > > > virtio-blk-numa 42517.07 =C2=B1 0.79% > > > > > > I remember I did something similar in vhost by using page_to_nid() for > > descriptor ring. And I get little improvement as shown here. > > > > Michael reminds that it was probably because all data were cached. So I > > doubt if the test lacks sufficient stress on the cache ... > > Yes, that sounds likely. If there's no real-w...

These patches are not ready to be merged because I was unable to measure a performance improvement. I'm publishing them so they are archived in case someone picks up this work again in the future. The goal of these patches is to allocate virtqueues and driver state from the device's NUMA node for optimal memory access latency. Only guests with a vNUMA topology and virtio devices spread

These patches are not ready to be merged because I was unable to measure a performance improvement. I'm publishing them so they are archived in case someone picks up this work again in the future. The goal of these patches is to allocate virtqueues and driver state from the device's NUMA node for optimal memory access latency. Only guests with a vNUMA topology and virtio devices spread

...lock_irqsave? include/linux/sched.h:1328: error: implicit declaration of function ?_spin_unlock_irqrestore? In file included from include/asm/pci.h:32, from include/linux/pci.h:804, from /usr/src/dahdi/drivers/dahdi/dahdi-base.c:42: include/linux/mm.h: In function ?page_to_nid?: include/linux/mm.h:534: error: ?struct zone? has no member named ?zone_pgdat? In file included from include/linux/mm.h:568, from include/asm/pci.h:32, from include/linux/pci.h:804, from /usr/src/dahdi/drivers/dahdi/dahdi-base.c:42: include/linux/...

...a disappeared from under * us. */ -int split_huge_page_to_list(struct page *page, struct list_head *list) +static int __split_huge_page_to_list(struct page *page, struct list_head *list, + bool remap) { struct page *head = compound_head(page); struct pglist_data *pgdata = NODE_DATA(page_to_nid(head)); @@ -2653,14 +2684,16 @@ int split_huge_page_to_list(struct page *page, struct list_head *list) * is taken to serialise against parallel split or collapse * operations. */ - anon_vma = page_get_anon_vma(head); - if (!anon_vma) { - ret = -EBUSY; - goto out; + if (remap) { +...

Hi everyone, Here are new releases of bio-cgroup. Changes from the previous version are as follows: - Accurate dirty-page tracking Support migrating pages between bio-cgroups with minimum overhead, but I think such a situation is quite rare. - Fix a bug of swapcache page handling Sometimes, "bad page state" is occurred since the memory controller has temporarily changed the

Hi everyone, Here are new releases of bio-cgroup. Changes from the previous version are as follows: - Accurate dirty-page tracking Support migrating pages between bio-cgroups with minimum overhead, but I think such a situation is quite rare. - Fix a bug of swapcache page handling Sometimes, "bad page state" is occurred since the memory controller has temporarily changed the

Hi everyone, Here are new releases of bio-cgroup. Changes from the previous version are as follows: - Accurate dirty-page tracking Support migrating pages between bio-cgroups with minimum overhead, but I think such a situation is quite rare. - Fix a bug of swapcache page handling Sometimes, "bad page state" is occurred since the memory controller has temporarily changed the

Hi all, With this series of patches, you can determine the owners of any type of I/Os. I ported the previous version to linux-2.6.26-rc2-mm1. This makes dm-ioband -- I/O bandwidth controller -- be able to control the Block I/O bandwidths even when it accepts delayed write requests. Dm-ioband can find the owner cgroup of each request. It is also possible that OpenVz team and NEC Uchida-san team

Hi all, With this series of patches, you can determine the owners of any type of I/Os. I ported the previous version to linux-2.6.26-rc2-mm1. This makes dm-ioband -- I/O bandwidth controller -- be able to control the Block I/O bandwidths even when it accepts delayed write requests. Dm-ioband can find the owner cgroup of each request. It is also possible that OpenVz team and NEC Uchida-san team

This series adds support for transparent huge page migration to migrate_vma_*() and adds nouveau SVM and HMM selftests as consumers. Earlier versions were posted previously [1] and [2]. The patches apply cleanly to the linux-mm 5.10.0-rc2 tree. There are a lot of other THP patches being posted. I don't think there are any semantic conflicts but there may be some merge conflicts depending on

This series adds support for transparent huge page migration to migrate_vma_*() and adds nouveau SVM and HMM selftests as consumers. An earlier version was posted previously [1]. This version now supports splitting a THP midway in the migration process which led to a number of changes. The patches apply cleanly to the current linux-mm tree. Since there are a couple of patches in linux-mm from Dan