- 29 8月, 2011 1 次提交
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由 Kevin Wolf 提交于
By default, require 4k of consecutive zero bytes for qemu-img to make the output file sparse by not issuing a write request for the zeroed parts. Add an -S option to allow users to tune this setting. This helps to avoid situations where a lot of zero sectors and data sectors are mixed and qemu-img tended to issue many tiny 512 byte writes. Signed-off-by: NKevin Wolf <kwolf@redhat.com>
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- 27 8月, 2011 1 次提交
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由 Christoph Hellwig 提交于
Account the total latency for read/write/flush requests. This allows management tools to average it based on a snapshot of the nr ops counters and allow checking for SLAs or provide statistics. Signed-off-by: NChristoph Hellwig <hch@lst.de> Signed-off-by: NKevin Wolf <kwolf@redhat.com>
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- 26 8月, 2011 1 次提交
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由 Christoph Hellwig 提交于
Decouple the I/O accounting from bdrv_aio_readv/writev/flush and make the hardware models call directly into the accounting helpers. This means: - we do not count internal requests from image formats in addition to guest originating I/O - we do not double count I/O ops if the device model handles it chunk wise - we only account I/O once it actuall is done - can extent I/O accounting to synchronous or coroutine I/O easily - implement I/O latency tracking easily (see the next patch) I've conveted the existing device model callers to the new model, device models that are using synchronous I/O and weren't accounted before haven't been updated yet. Also scsi hasn't been converted to the end-to-end accounting as I want to defer that after the pending scsi layer overhaul. Signed-off-by: NChristoph Hellwig <hch@lst.de> Signed-off-by: NKevin Wolf <kwolf@redhat.com>
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- 25 8月, 2011 2 次提交
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由 Frediano Ziglio 提交于
Signed-off-by: NFrediano Ziglio <freddy77@gmail.com> Signed-off-by: NKevin Wolf <kwolf@redhat.com>
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由 Frediano Ziglio 提交于
let all DEBUG_ALLOC2 printf goes to stderr Signed-off-by: NFrediano Ziglio <freddy77@gmail.com> Signed-off-by: NKevin Wolf <kwolf@redhat.com>
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- 24 8月, 2011 1 次提交
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由 MORITA Kazutaka 提交于
This makes the sheepdog block driver support bdrv_co_readv/writev instead of bdrv_aio_readv/writev. With this patch, Sheepdog network I/O becomes fully asynchronous. The block driver yields back when send/recv returns EAGAIN, and is resumed when the sheepdog network connection is ready for the operation. Signed-off-by: NMORITA Kazutaka <morita.kazutaka@lab.ntt.co.jp> Signed-off-by: NKevin Wolf <kwolf@redhat.com>
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- 23 8月, 2011 34 次提交
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由 Frediano Ziglio 提交于
Signed-off-by: NFrediano Ziglio <freddy77@gmail.com> Signed-off-by: NKevin Wolf <kwolf@redhat.com>
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由 Frediano Ziglio 提交于
Signed-off-by: NFrediano Ziglio <freddy77@gmail.com> Signed-off-by: NKevin Wolf <kwolf@redhat.com>
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由 Frediano Ziglio 提交于
prepare to remove read/write callbacks Signed-off-by: NFrediano Ziglio <freddy77@gmail.com> Signed-off-by: NKevin Wolf <kwolf@redhat.com>
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由 Frediano Ziglio 提交于
Signed-off-by: NFrediano Ziglio <freddy77@gmail.com> Signed-off-by: NKevin Wolf <kwolf@redhat.com>
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由 Frediano Ziglio 提交于
Signed-off-by: NFrediano Ziglio <freddy77@gmail.com> Signed-off-by: NKevin Wolf <kwolf@redhat.com>
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由 Frediano Ziglio 提交于
Signed-off-by: NFrediano Ziglio <freddy77@gmail.com> Signed-off-by: NKevin Wolf <kwolf@redhat.com>
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由 Frediano Ziglio 提交于
Signed-off-by: NFrediano Ziglio <freddy77@gmail.com> Signed-off-by: NKevin Wolf <kwolf@redhat.com>
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由 Frediano Ziglio 提交于
Signed-off-by: NFrediano Ziglio <freddy77@gmail.com> Signed-off-by: NKevin Wolf <kwolf@redhat.com>
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由 Frediano Ziglio 提交于
Signed-off-by: NFrediano Ziglio <freddy77@gmail.com> Signed-off-by: NKevin Wolf <kwolf@redhat.com>
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由 Frediano Ziglio 提交于
Embed qcow_aio_read_cb into qcow_co_readv and qcow_aio_write_cb into qcow_co_writev Signed-off-by: NFrediano Ziglio <freddy77@gmail.com> Signed-off-by: NKevin Wolf <kwolf@redhat.com>
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由 Frediano Ziglio 提交于
Signed-off-by: NFrediano Ziglio <freddy77@gmail.com> Signed-off-by: NKevin Wolf <kwolf@redhat.com>
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由 Frediano Ziglio 提交于
remove unused field from this structure and put some of them in qcow_aio_read_cb and qcow_aio_write_cb Signed-off-by: NFrediano Ziglio <freddy77@gmail.com> Signed-off-by: NKevin Wolf <kwolf@redhat.com>
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由 Frediano Ziglio 提交于
instead of calling qemi_aio_get use stack Signed-off-by: NFrediano Ziglio <freddy77@gmail.com> Signed-off-by: NKevin Wolf <kwolf@redhat.com>
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由 Avi Kivity 提交于
In certain circumstances, posix-aio-compat can incur a lot of latency: - threads are created by vcpu threads, so if vcpu affinity is set, aio threads inherit vcpu affinity. This can cause many aio threads to compete for one cpu. - we can create up to max_threads (64) aio threads in one go; since a pthread_create can take around 30μs, we have up to 2ms of cpu time under a global lock. Fix by: - moving thread creation to the main thread, so we inherit the main thread's affinity instead of the vcpu thread's affinity. - if a thread is currently being created, and we need to create yet another thread, let thread being born create the new thread, reducing the amount of time we spend under the main thread. - drop the local lock while creating a thread (we may still hold the global mutex, though) Note this doesn't eliminate latency completely; scheduler artifacts or lack of host cpu resources can still cause it. We may want pre-allocated threads when this cannot be tolerated. Thanks to Uli Obergfell of Red Hat for his excellent analysis and suggestions. Signed-off-by: NAvi Kivity <avi@redhat.com> Signed-off-by: NKevin Wolf <kwolf@redhat.com>
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由 Christoph Hellwig 提交于
Signed-off-by: NChristoph Hellwig <hch@lst.de> Signed-off-by: NKevin Wolf <kwolf@redhat.com>
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由 Nicholas Thomas 提交于
Current behaviour if a read fails is for the acb to not get finished. This causes an infinite loop in bdrv_read_em (block.c). The read failure never gets reported to the guest and if the error condition clears, the process never recovers. With this patch, when curl reports a failure we finish the acb as a failure. This results in the guest receiving an I/O error (rather than the read hanging indefinitely) and if the error condition subsequently clears, retries work as expected. The simplest test is to put an ISO on a web server you have control over and open it with qemu-io. Then move the ISO out of the way and attempt to read some data - you should see behaviour matching the above. Signed-off-by: NNick Thomas <nick@bytemark.co.uk> Signed-off-by: NKevin Wolf <kwolf@redhat.com>
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由 Stefan Hajnoczi 提交于
Signed-off-by: NStefan Hajnoczi <stefanha@linux.vnet.ibm.com> Signed-off-by: NKevin Wolf <kwolf@redhat.com>
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由 Scott Wood 提交于
commit 52b8eb60 added a mutex, but never initialized it. This caused a segfault. Reported-by: NAlexander Graf <agraf@suse.de> Signed-off-by: NScott Wood <scottwood@freescale.com> Signed-off-by: NKevin Wolf <kwolf@redhat.com>
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由 Devin Nakamura 提交于
Documentation states the num is measured in clusters, but its actually measured in sectors Signed-off-by: NDevin Nakamura <devin122@gmail.com> Signed-off-by: NKevin Wolf <kwolf@redhat.com>
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由 Kevin Wolf 提交于
Now that you can use cache=none for the output file in qemu-img, we should properly align our buffers so that raw-posix doesn't have to use its (smaller) bounce buffer. Signed-off-by: NKevin Wolf <kwolf@redhat.com> Reviewed-by: NStefan Hajnoczi <stefanha@linux.vnet.ibm.com>
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由 Philipp Hahn 提交于
By introducing BlockDriverState compiling qcow2 with DEBUG_ALLOC and DEBUG_EXT defined got broken. Define a BdrvCheckResult structure locally which is now needed as the second argument. Also fix qcow2_read_extensions() needing BDRVQcowState. Signed-off-by: NPhilipp Hahn <hahn@univention.de> Signed-off-by: NKevin Wolf <kwolf@redhat.com>
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由 Stefan Hajnoczi 提交于
This patch adds -drive cache=directsync for O_DIRECT | O_SYNC host file I/O with no disk write cache presented to the guest. This mode is useful when guests may not be sending flushes when appropriate and therefore leave data at risk in case of power failure. When cache=directsync is used, write operations are only completed to the guest when data is safely on disk. This new mode is like cache=writethrough but it bypasses the host page cache. Signed-off-by: NStefan Hajnoczi <stefanha@linux.vnet.ibm.com> Signed-off-by: NKevin Wolf <kwolf@redhat.com>
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由 Stefan Hajnoczi 提交于
This patch introduces bdrv_parse_cache_flags() which sets open flags given a cache mode. Previously this was duplicated in blockdev.c and qemu-img.c. Signed-off-by: NStefan Hajnoczi <stefanha@linux.vnet.ibm.com> Signed-off-by: NKevin Wolf <kwolf@redhat.com>
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由 Aneesh Kumar K.V 提交于
Signed-off-by: NAneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: NKevin Wolf <kwolf@redhat.com>
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由 Peter A. G. Crosthwaite 提交于
This is a microblaze target specific function that belongs outside of xilinx.h (which is a collection of target independent device model instantiator functions) Signed-off-by: NPeter A. G. Crosthwaite <peter.crosthwaite@petalogix.com> Signed-off-by: NEdgar E. Iglesias <edgar.iglesias@gmail.com>
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由 Peter A. G. Crosthwaite 提交于
Added some missing #includes for this file. Previously this file relied on its clients to pre-include its dependencies. Signed-off-by: NPeter A. G. Crosthwaite <peter.crosthwaite@petalogix.com> Signed-off-by: NEdgar E. Iglesias <edgar.iglesias@gmail.com>
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由 Jan Kiszka 提交于
While in full-screen mode, the input focus naturally belongs to the SDL window. Avoid dropping it when switching from absolute to relative mouse mode. Signed-off-by: NJan Kiszka <jan.kiszka@siemens.com> Signed-off-by: NAnthony Liguori <aliguori@us.ibm.com>
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由 Jan Kiszka 提交于
We can express the VCPU thread wakeup with the stop mechanism, saving both qemu_system_ready and the qemu_system_cond. For KVM threads, we can just enter the main loop as long as the thread is stopped. The central TCG thread is better held back before the loop as there can be side effects of the services called even when all CPUs are stopped. Creating VCPUs in stopped state will also be required for proper CPU hotplugging support. Signed-off-by: NJan Kiszka <jan.kiszka@siemens.com> Signed-off-by: NAnthony Liguori <aliguori@us.ibm.com>
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由 Jan Kiszka 提交于
Memory region refactorings obsoleted them. CC: Avi Kivity <avi@redhat.com> Signed-off-by: NJan Kiszka <jan.kiszka@siemens.com> Signed-off-by: NAnthony Liguori <aliguori@us.ibm.com>
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由 Jan Kiszka 提交于
Most VGA memory access modes require MMIO handling as they demand weird logic to get a byte from or into the video RAM. However, there is one exception: chain 4 mode with all memory planes enabled for writing. This mode actually allows lineary mapping, which can then be combined with dirty logging to accelerate KVM. This patch accelerates specifically VBE accesses like they are used by grub in graphical mode. Not only the standard VGA adapter benefits from this, also vmware and spice in VGA mode. CC: Gerd Hoffmann <kraxel@redhat.com> CC: Avi Kivity <avi@redhat.com> Signed-off-by: NJan Kiszka <jan.kiszka@siemens.com> Signed-off-by: NAnthony Liguori <aliguori@us.ibm.com>
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由 Jan Kiszka 提交于
After the conversion to the new Memory API, vga_dirty_log_restart became seriously pointless. Remove it from vmware-vga and and then finally drop the service. CC: Andrzej Zaborowski <balrogg@gmail.com> CC: Avi Kivity <avi@redhat.com> Signed-off-by: NJan Kiszka <jan.kiszka@siemens.com> Signed-off-by: NAnthony Liguori <aliguori@us.ibm.com>
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由 Jan Kiszka 提交于
The code was disabled since day 1 of vmware-vga, and now it does not even build anymore. Time for a cleanup. CC: Andrzej Zaborowski <balrogg@gmail.com> Signed-off-by: NJan Kiszka <jan.kiszka@siemens.com> Signed-off-by: NAnthony Liguori <aliguori@us.ibm.com>
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由 Jan Kiszka 提交于
Elimiates 'vmsvga_value_write: guest runs Linux.' messages from the console. CC: Andrzej Zaborowski <balrogg@gmail.com> Signed-off-by: NJan Kiszka <jan.kiszka@siemens.com> Signed-off-by: NAnthony Liguori <aliguori@us.ibm.com>
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由 Jan Kiszka 提交于
Fixes cold reset in vmware graphic modes. We need to split up the reset function for this purpose, breaking out init-once bits. Cc: Andrzej Zaborowski <balrogg@gmail.com> Signed-off-by: NJan Kiszka <jan.kiszka@siemens.com> Signed-off-by: NAnthony Liguori <aliguori@us.ibm.com>
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