search for: max_pending_req

hi I've some problems with netback 1.what's mmap_pages for, which come from balloon operation ？ mmap_pages = alloc_empty_pages_and_pagevec(MAX_PENDING_REQS) 2.what's the meaning of "refcnt" defined in netif_t (netif->refcnt) 3.irq enable and disable such as disable_irq(netif->irq); why netback use such enable & disable operations while netfront dont use for its irq? 4.blank "resume" operation for netback why netfr...

branch xen-unstable xen branch xen-unstable job test-amd64-i386-rhel6hvm-amd test redhat-install Tree: linux git://git.kernel.org/pub/scm/linux/kernel/git/jeremy/xen.git Tree: qemu git://xenbits.xen.org/staging/qemu-xen-unstable.git Tree: qemuu git://xenbits.xen.org/staging/qemu-upstream-unstable.git Tree: xen http://xenbits.xen.org/staging/xen-unstable.hg *** Found and reproduced problem

...ers/net/xen-netback/netback.c index a0b50ad..130bcb2 100644 --- a/drivers/net/xen-netback/netback.c +++ b/drivers/net/xen-netback/netback.c @@ -1968,8 +1968,8 @@ static void __exit netback_fini(void) del_timer_sync(&netbk->net_timer); kthread_stop(netbk->task); for (j = 0; j < MAX_PENDING_REQS; j++) { - if (netbk->mmap_pages[i]) - __free_page(netbk->mmap_pages[i]); + if (netbk->mmap_pages[j]) + __free_page(netbk->mmap_pages[j]); } }

Hi Keir: These two patches remove the need for netloop by performing the copying in netback and only if it is necessary. The rationale is that most packets will be processed without delay allowing them to be freed without copying at all. So instead of copying every packet destined to dom0 we''ll only copy those that linger longer than a specified amount of time (currently 0.5s). As it