search for: blkdev_dequeue_request

...sk->private_data; > + > + vbr = mempool_alloc(vblk->pool, GFP_ATOMIC); > + if (!vbr) > + goto stop; > + > + BUG_ON(req->nr_phys_segments > ARRAY_SIZE(vblk->sg)); > + vbr->req = req; > + if (!do_req(q, vblk, vbr)) > + goto stop; > + blkdev_dequeue_request(req); > + } > + > +sync: > + if (vblk) this check looks bogus, as vblk->pool has been accessed unconditionally above > + vblk->vq->ops->sync(vblk->vq); > + return; > + > +stop: > + /* Queue full? Wait. */ > + blk_stop_queue(q); > + me...

...sk->private_data; > + > + vbr = mempool_alloc(vblk->pool, GFP_ATOMIC); > + if (!vbr) > + goto stop; > + > + BUG_ON(req->nr_phys_segments > ARRAY_SIZE(vblk->sg)); > + vbr->req = req; > + if (!do_req(q, vblk, vbr)) > + goto stop; > + blkdev_dequeue_request(req); > + } > + > +sync: > + if (vblk) this check looks bogus, as vblk->pool has been accessed unconditionally above > + vblk->vq->ops->sync(vblk->vq); > + return; > + > +stop: > + /* Queue full? Wait. */ > + blk_stop_queue(q); > + me...

..._dma dma; + struct request *req; +}; + +/* Jens gave me this nice helper to end all chunks of a request. */ +static void end_entire_request(struct request *req, int uptodate) +{ + if (end_that_request_first(req, uptodate, req->hard_nr_sectors)) + BUG(); + add_disk_randomness(req->rq_disk); + blkdev_dequeue_request(req); + end_that_request_last(req, uptodate); +} + +static irqreturn_t lgb_irq(int irq, void *_bd) +{ + struct blockdev *bd = _bd; + unsigned long flags; + + if (!bd->req) { + pr_debug("No work!\n"); + return IRQ_NONE; + } + + if (!bd->lb_page->result) { + pr_debug("No re...

..._dma dma; + struct request *req; +}; + +/* Jens gave me this nice helper to end all chunks of a request. */ +static void end_entire_request(struct request *req, int uptodate) +{ + if (end_that_request_first(req, uptodate, req->hard_nr_sectors)) + BUG(); + add_disk_randomness(req->rq_disk); + blkdev_dequeue_request(req); + end_that_request_last(req, uptodate); +} + +static irqreturn_t lgb_irq(int irq, void *_bd) +{ + struct blockdev *bd = _bd; + unsigned long flags; + + if (!bd->req) { + pr_debug("No work!\n"); + return IRQ_NONE; + } + + if (!bd->lb_page->result) { + pr_debug("No re...

...r: dereferencing pointer to incomplete type drivers/block/lguest_blk.c:82: error: implicit declaration of function 'add_disk_randomness' drivers/block/lguest_blk.c:82: error: dereferencing pointer to incomplete type drivers/block/lguest_blk.c:83: error: implicit declaration of function 'blkdev_dequeue_request' drivers/block/lguest_blk.c:84: error: implicit declaration of function 'end_that_request_last' drivers/block/lguest_blk.c: In function 'lgb_irq': drivers/block/lguest_blk.c:128: error: implicit declaration of function 'blk_start_queue' drivers/block/lguest_blk.c:128: er...

...r: dereferencing pointer to incomplete type drivers/block/lguest_blk.c:82: error: implicit declaration of function 'add_disk_randomness' drivers/block/lguest_blk.c:82: error: dereferencing pointer to incomplete type drivers/block/lguest_blk.c:83: error: implicit declaration of function 'blkdev_dequeue_request' drivers/block/lguest_blk.c:84: error: implicit declaration of function 'end_that_request_last' drivers/block/lguest_blk.c: In function 'lgb_irq': drivers/block/lguest_blk.c:128: error: implicit declaration of function 'blk_start_queue' drivers/block/lguest_blk.c:128: er...

Hi again all, It turns out that networking really wants ordered requests, which the previous patches didn't allow. This patch changes it to a callback mechanism; kudos to Avi. The downside is that locking is more complicated, and after a few dead ends I implemented the simplest solution: the struct virtio_device contains the spinlock to use, and it's held when your callbacks get

Hi again all, It turns out that networking really wants ordered requests, which the previous patches didn't allow. This patch changes it to a callback mechanism; kudos to Avi. The downside is that locking is more complicated, and after a few dead ends I implemented the simplest solution: the struct virtio_device contains the spinlock to use, and it's held when your callbacks get

Hi again all, It turns out that networking really wants ordered requests, which the previous patches didn't allow. This patch changes it to a callback mechanism; kudos to Avi. The downside is that locking is more complicated, and after a few dead ends I implemented the simplest solution: the struct virtio_device contains the spinlock to use, and it's held when your callbacks get

In response to Avi's excellent analysis, I've updated virtio as promised (apologies for the delay, travel got in the way). === This attempts to implement a "virtual I/O" layer which should allow common drivers to be efficiently used across most virtual I/O mechanisms. It will no-doubt need further enhancement. The details of probing the device are left to hypervisor-specific

In response to Avi's excellent analysis, I've updated virtio as promised (apologies for the delay, travel got in the way). === This attempts to implement a "virtual I/O" layer which should allow common drivers to be efficiently used across most virtual I/O mechanisms. It will no-doubt need further enhancement. The details of probing the device are left to hypervisor-specific

Hi all, These are the patches I'm planning to submit for 2.6.24. Comments gratefully accepted. Along with the usual cleanups and improvements are Jes' de-i386-ification patches, and a new "virtio" mechanism designed to be shared with KVM (and hopefully other hypervisors). Cheers, Rusty. Documentation/lguest/Makefile | 30 Documentation/lguest/lguest.c

Hi all, These are the patches I'm planning to submit for 2.6.24. Comments gratefully accepted. Along with the usual cleanups and improvements are Jes' de-i386-ification patches, and a new "virtio" mechanism designed to be shared with KVM (and hopefully other hypervisors). Cheers, Rusty. Documentation/lguest/Makefile | 30 Documentation/lguest/lguest.c

This patch series implements the Linux Xen guest in terms of the paravirt-ops interface. The features in implemented this patch series are: * domU only * UP only (most code is SMP-safe, but there's no way to create a new vcpu) * writable pagetables, with late pinning/early unpinning (no shadow pagetable support) * supports both PAE and non-PAE modes * xen console * virtual block

This patch series implements the Linux Xen guest in terms of the paravirt-ops interface. The features in implemented this patch series are: * domU only * UP only (most code is SMP-safe, but there's no way to create a new vcpu) * writable pagetables, with late pinning/early unpinning (no shadow pagetable support) * supports both PAE and non-PAE modes * xen console * virtual block

This patch series implements the Linux Xen guest in terms of the paravirt-ops interface. The features in implemented this patch series are: * domU only * UP only (most code is SMP-safe, but there's no way to create a new vcpu) * writable pagetables, with late pinning/early unpinning (no shadow pagetable support) * supports both PAE and non-PAE modes * xen console * virtual block

Hi Andi, This patch series implements the Linux Xen guest as a paravirt_ops backend. The features in implemented this patch series are: * domU only * UP only (most code is SMP-safe, but there's no way to create a new vcpu) * writable pagetables, with late pinning/early unpinning (no shadow pagetable support) * supports both PAE and non-PAE modes * xen hvc console (console=hvc0) *

Hi Andi, This patch series implements the Linux Xen guest as a paravirt_ops backend. The features in implemented this patch series are: * domU only * UP only (most code is SMP-safe, but there's no way to create a new vcpu) * writable pagetables, with late pinning/early unpinning (no shadow pagetable support) * supports both PAE and non-PAE modes * xen hvc console (console=hvc0) *

Hi Andi, This patch series implements the Linux Xen guest as a paravirt_ops backend. The features in implemented this patch series are: * domU only * UP only (most code is SMP-safe, but there's no way to create a new vcpu) * writable pagetables, with late pinning/early unpinning (no shadow pagetable support) * supports both PAE and non-PAE modes * xen hvc console (console=hvc0) *

Unlike full virtualization in which the virtual machine provides the same platform interface as running natively on the hardware, paravirtualization requires modification to the guest operating system to work with the platform interface provided by the hypervisor. Xen was designed with performance in mind. Calls to the hypervisor are minimized, batched if necessary, and non-critical codepaths