search for: page_pool

...xen-netback: switch to NAPI + kthread 1:1 model drivers/net/xen-netback/Makefile | 2 +- drivers/net/xen-netback/common.h | 92 ++-- drivers/net/xen-netback/interface.c | 124 +++-- drivers/net/xen-netback/netback.c | 977 +++++++++++++++-------------------- drivers/net/xen-netback/page_pool.c | 186 +++++++ drivers/net/xen-netback/page_pool.h | 60 +++ 6 files changed, 812 insertions(+), 629 deletions(-) create mode 100644 drivers/net/xen-netback/page_pool.c create mode 100644 drivers/net/xen-netback/page_pool.h -- 1.7.10.4

...xtent_readpages(struct extent_io_tree *tree, struct address_space *mapping, struct list_head *pages, unsigned nr_pages, @@ -3557,19 +3562,51 @@ int extent_readpages(struct extent_io_tree *tree, struct bio *bio = NULL; unsigned page_idx; unsigned long bio_flags = 0; + LIST_HEAD(page_pool); + struct pagelst *pagelst = NULL; for (page_idx = 0; page_idx < nr_pages; page_idx++) { struct page *page = list_entry(pages->prev, struct page, lru); + bool delay_read = true; prefetchw(&page->flags); list_del(&page->lru); + + if (!pagelst) + pagelst = kmal...

...xtent_readpages(struct extent_io_tree *tree, struct address_space *mapping, struct list_head *pages, unsigned nr_pages, @@ -3557,19 +3562,47 @@ int extent_readpages(struct extent_io_tree *tree, struct bio *bio = NULL; unsigned page_idx; unsigned long bio_flags = 0; + LIST_HEAD(page_pool); + struct pagelst *pagelst = NULL; for (page_idx = 0; page_idx < nr_pages; page_idx++) { struct page *page = list_entry(pages->prev, struct page, lru); prefetchw(&page->flags); list_del(&page->lru); + + if (!pagelst) + pagelst = kmalloc(sizeof(*pagelst), GFP_N...

...> create mode 100644 include/net/net_failover.h > create mode 100644 net/core/net_failover.c > diff --git a/net/Kconfig b/net/Kconfig > index b62089fb1332..0540856676de 100644 > --- a/net/Kconfig > +++ b/net/Kconfig > @@ -429,6 +429,16 @@ config MAY_USE_DEVLINK > config PAGE_POOL > bool > > +config NET_FAILOVER > + tristate "Failover interface" > + default m Need some justification for default m (as opposed to n). > + help > + This provides a generic interface for paravirtual drivers to listen > + for netdev register/unregis...

...f (unlikely(xdp_page != page)) > > - __free_pages(xdp_page, 0); > > It seems __free_pages() and put_page() is used interchangeably here. > Perhaps using __free_pages() have performance reason? As the comment below: > > https://elixir.bootlin.com/linux/v6.3-rc3/source/net/core/page_pool.c#L500 Yes, but now we don't seem to be very good to distinguish it. But I think it doesn't matter. This logic is rare under actual situation. Thanks. > > > - > > if (xdp_buff_has_frags(&xdp)) { > > shinfo = xdp_get_shared_info_from_buff(&xdp); >...

...ver_unregister(struct failover *failover); +int failover_slave_unregister(struct net_device *slave_dev); + +#endif /* _FAILOVER_H */ diff --git a/net/Kconfig b/net/Kconfig index df8d45ef47d8..d581c4f0f1c4 100644 --- a/net/Kconfig +++ b/net/Kconfig @@ -430,6 +430,19 @@ config MAY_USE_DEVLINK config PAGE_POOL bool +config FAILOVER + tristate "Generic failover module" + help + The failover module provides a generic interface for paravirtual + drivers to register a netdev and a set of ops with a failover + instance. The ops are used as event handlers that get called to + handle...

The main motivation for this patch is to enable cloud service providers to provide an accelerated datapath to virtio-net enabled VMs in a transparent manner with no/minimal guest userspace changes. This also enables hypervisor controlled live migration to be supported with VMs that have direct attached SR-IOV VF devices. Patch 1 introduces a new feature bit VIRTIO_NET_F_STANDBY that can be used

...er(struct net_failover *failover); +int net_failover_slave_unregister(struct net_device *slave_dev); + +#endif /* _NET_FAILOVER_H */ diff --git a/net/Kconfig b/net/Kconfig index b62089fb1332..0540856676de 100644 --- a/net/Kconfig +++ b/net/Kconfig @@ -429,6 +429,16 @@ config MAY_USE_DEVLINK config PAGE_POOL bool +config NET_FAILOVER + tristate "Failover interface" + default m + help + This provides a generic interface for paravirtual drivers to listen + for netdev register/unregister/link change events from pci ethernet + devices with the same MAC and takeover their datapath....

This is another update based on feedback from MST and Stephen on the last patchset. Hopefully this series can be integrated and any further enhancements can be made on top of this patchset. v8: - Made the failover managment routines more robust by updating the feature bits/other fields in the failover netdev when slave netdevs are registered/unregistered. (mst) - added support for handling

The main motivation for this patch is to enable cloud service providers to provide an accelerated datapath to virtio-net enabled VMs in a transparent manner with no/minimal guest userspace changes. This also enables hypervisor controlled live migration to be supported with VMs that have direct attached SR-IOV VF devices. Patch 1 introduces a failover module that provides a generic interface for

The main motivation for this patch is to enable cloud service providers to provide an accelerated datapath to virtio-net enabled VMs in a transparent manner with no/minimal guest userspace changes. This also enables hypervisor controlled live migration to be supported with VMs that have direct attached SR-IOV VF devices. Patch 1 introduces a failover module that provides a generic interface for