This ensures hot-unplug is handled properly by the proxy, and avoids
leaking bus_name which is freed by virtio_device_exit.
Cc: qemu-stable@nongnu.org
Acked-by: Andreas Faerber <afaerber@suse.de>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This ensures hot-unplug is handled properly by the proxy, and avoids
leaking bus_name which is freed by virtio_device_exit.
Cc: qemu-stable@nongnu.org
Acked-by: Andreas Faerber <afaerber@suse.de>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Right now we have these pairs:
- virtio_bus_plug_device/virtio_bus_destroy_device. The first
takes a VirtIODevice, the second takes a VirtioBusState
- device_plugged/device_unplug callbacks in the VirtioBusClass
(here it's just the naming that is inconsistent)
- virtio_bus_destroy_device is not called by anyone (and since
it calls qdev_free, it would be called by the proxies---but
then the callback is useless since the proxies can do whatever
they want before calling virtio_bus_destroy_device)
And there is a k->init but no k->exit, hence virtio_device_exit is
overwritten by subclasses (except virtio-9p). This cleans it up by:
- renaming the device_unplug callback to device_unplugged
- renaming virtio_bus_plug_device to virtio_bus_device_plugged,
matching the callback name
- renaming virtio_bus_destroy_device to virtio_bus_device_unplugged,
removing the qdev_free, making it take a VirtIODevice and calling it
from virtio_device_exit
- adding a k->exit callback
virtio_device_exit is still overwritten, the next patches will fix that.
Cc: qemu-stable@nongnu.org
Acked-by: Andreas Faerber <afaerber@suse.de>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
The vdev field is complicated to synchronize. Just access the
BusState's list of children.
Cc: qemu-stable@nongnu.org
Acked-by: Andreas Faerber <afaerber@suse.de>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
The vdev field is complicated to synchronize. Just access the
BusState's list of children.
Cc: qemu-stable@nongnu.org
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Acked-by: Andreas Faerber <afaerber@suse.de>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
The vdev field is complicated to synchronize. Just access the
BusState's list of children.
Cc: qemu-stable@nongnu.org
Acked-by: Andreas Faerber <afaerber@suse.de>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Similar to the PCI bug that prompted these patches, virtio-ccw will
segfault after the reworking of hotplug/hot-unplug. Prepare for
this by moving virtio_ccw_stop_ioeventfd to before the freeing
of the proxy device.
A better place for this could be the device_unplugged callback
for the virtio-ccw bus. However, we do not yet have a callback
that works: this patch avoids the problem while leaving the tree
bisectable.
Cc: qemu-stable@nongnu.org
Reported-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Suggested-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Acked-by: Andreas Faerber <afaerber@suse.de>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This improves readability and simplifies the code.
Cc: Aurelien Jarno <aurelien@aurel32.net>
Signed-off-by: Stefan Weil <sw@weilnetz.de>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
FR bit should be initialized to 1 for MIPS64, under condition that this
bit is writable and that CPU has an FPU unit. It should be initialized to
zero for MIPS32.
This fixes different MIPS32 issues with FPU instructions whose behaviour
defaulted to 64-bit FPU mode.
Signed-off-by: Petar Jovanovic <petar.jovanovic@imgtec.com>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
Everything before CPU_COMMON in the structure is cleared as part of a
CPU reset. This included the features flag, which indicates whether SH4A
instructions are supported or not. As a result, a CPU reset downgraded
the CPU from an SH4A to an SH4.
Signed-off-by: Bobby Bingham <koorogi@koorogi.info>
Reviewed-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
When a link change occurs on a backend (like tap), we currently do
not propage such change to the nic. As a result, when someone turns
off a link on a tap device, for instance, then a guest doesn't see
that change and continues to try to send traffic or run DHCP even
though the lower-layer is disconnected. This is OK when the network
is set up as a HUB since the the guest may be connected to other HUB
ports too, but when it's set up as a netdev, it makes thinkgs worse.
The patch addresses this by setting the peers link down only when the
peer is not a HUBPORT device. With this patch, in the following config
-netdev tap,id=net0 -device e1000,mac=XXXXX,netdev=net0
when net0 link is turned off, the guest e1000 shows lower-layer link
down. This allows guests to boot much faster in such configurations.
With windows guest, it also allows the network to recover properly
since windows will not configure the link-local IPv4 address, and
when the link is turned on, the proper address address is configured.
Signed-off-by: Vlad Yasevich <vyasevic@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
mac_table was always cleaned up first in handling
VIRTIO_NET_CTRL_MAC_TABLE_SET command, and we din't recover
mac_table content in error state, it's not correct.
This patch makes all the changes in temporal variables,
only update the real mac_table if everything is ok.
We won't change mac_table in error state, so rxfilter
notification isn't needed.
This patch also fixed same problame in
http://lists.nongnu.org/archive/html/qemu-devel/2013-11/msg01188.html
(not merge)
I will send patch for virtio spec to clarifying this change.
Signed-off-by: Amos Kong <akong@redhat.com>
Reviewed-by: Vlad Yasevich <vyasevic@redhat.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
This patch adds support for a network backend based on netmap.
netmap is a framework for high speed packet I/O. You can use it
to build extremely fast traffic generators, monitors, software
switches or network middleboxes. Its companion software switch
VALE lets you interconnect virtual machines.
netmap and VALE are implemented as a non-intrusive kernel module,
support NICs from multiple vendors, are part of standard FreeBSD
distributions and available in source format for Linux too.
To compile QEMU with netmap support, use the following configure
options:
./configure [...] --enable-netmap --extra-cflags=-I/path/to/netmap/sys
where "/path/to/netmap" contains the netmap source code, available at
http://info.iet.unipi.it/~luigi/netmap/
The same webpage contains more information about the netmap project
(together with papers and presentations).
Signed-off-by: Vincenzo Maffione <v.maffione@gmail.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
this converts read, write and flush functions from aio to coroutines
eliminating almost 200 lines of code.
The requirement for libiscsi is bumped to version 1.4.0 which was
released in may 2012.
Signed-off-by: Peter Lieven <pl@kamp.de>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
VERIFY emulation was completely botched (and remained botched through
all the refactorings). The command must be emulated both in check-medium
mode (BYTCHK=00, which we implement by doing nothing) and in check-bytes
mode (which we do not implement yet). Unlike WRITE AND VERIFY (which we
treat simply as WRITE with FUA bit set), VERIFY cannot be handled like
READ. In fact the device is _receiving_ data for VERIFY, not _sending_
it like READ.
Cc: qemu-stable@nongnu.org
Tested-by: Hervé Poussineau <hpoussin@reactos.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
The amount of bytes to transfer depends on the BYTCHK field.
If any data is transferred, it is sent to the device.
Cc: qemu-stable@nongnu.org
Tested-by: Hervé Poussineau <hpoussin@reactos.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
See https://bugs.launchpad.net/bugs/1258168
libcacard/vscclient.c: In function 'do_socket_read':
libcacard/vscclient.c:410: warning: implicit declaration of function 'g_warn_if_reached'
libcacard/vscclient.c:410: warning: nested extern declaration of 'g_warn_if_reached'
libcacard/vscclient.c: In function 'main':
libcacard/vscclient.c:763: warning: implicit declaration of function 'g_byte_array_unref'
libcacard/vscclient.c:763: warning: nested extern declaration of 'g_byte_array_unref'
...
libcacard/vscclient.o: In function `do_socket_read':
libcacard/vscclient.c:410: undefined reference to `g_warn_if_reached'
libcacard/vscclient.o: In function `main':
libcacard/vscclient.c:763: undefined reference to `g_byte_array_unref'
g_warn_if_reached was added in glib 2.16, and g_byte_array_unref is
supported since glib 2.22. QEMU requires glib 2.12, so both names must
not be used.
Instead of showing a warning for code which should not be reached,
vscclient better stop running, so g_warn_if_reached is not useful for
vscclient.
In libcacard/vsclient.c, g_byte_array_unref can be replaced by
g_byte_array_free. This is not generally true, so adding a compatibility
layer in include/glib-compat.h is no option here.
Reported-by: Laurent Desnogues <laurent.desnogues@gmail.com>
Reported-by: Don Slutz <dslutz@verizon.com>
Signed-off-by: Stefan Weil <sw@weilnetz.de>
Fix position buffer updates to use the correct stream offset.
Without this patch both IN (record) and OUT (playback) streams
will update the IN buffer positions. The linux kernel notices
and complains:
hda-intel: Invalid position buffer, using LPIB read method instead.
The bug may also lead to glitches when recording and playing
at the same time:
https://bugzilla.redhat.com/show_bug.cgi?id=947785
Cc: qemu-stable@nongnu.org
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Commit 2b21fb5 (adlib: sort offsets in portio registration, 2013-08-14)
fixed the offsets in adlib_portio_list, but forgot the matching indices
in adlib_realizefn.
Reported at http://virtuallyfun.superglobalmegacorp.com/?p=3616 by
"neozeed".
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Hervé Poussineau <hpoussin@reactos.org>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
This is more then plenty to keep audio card fifos filles / emptied.
This drops host cpu-load for audio playback inside a linux vm from
13% to 9%.
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Using the new opcodes we can reduce if/else trees to
a single statement.
Reviewed-by: Edgar E. Iglesias <edgar.iglesias@gmail.com>
Cc: Edgar E. Iglesias <edgar.iglesias@gmail.com>
Signed-off-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Edgar E. Iglesias <edgar.iglesias@gmail.com>
Commit ac86048bcd removed trace.h from
console.h and ignored the fact that qxl-render.c needs this file
(it includes qxl.h which includes console.h which included trace.h).
Signed-off-by: Stefan Weil <sw@weilnetz.de>
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
- Update linux-headers to include KVM-VFIO device support
- Enable QEMU support for KVM-VFIO device
- Additional Nvidia x-vga quirk to ACK MSI interrupts
- Debug options to disable MSI/X KVM acceleration
- Fix to cleanup MSI-X vectors on shutdown and avoid IRQ route leaks
The KVM-VFIO device support enables KVM to manage how it handles
coherency instructions in the presence of non-coherent I/O. Dave
Airlie had noted that the Nvidia MSI ACK support here may just be
scratching the surface, but it's better than what we have now and
it's only enabled via the x-vga option, so I'm willing to add since
it does enable some users.
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Merge remote-tracking branch 'awilliam/tags/vfio-pci-for-qemu-20131206.0' into staging
vfio-pci updates include:
- Update linux-headers to include KVM-VFIO device support
- Enable QEMU support for KVM-VFIO device
- Additional Nvidia x-vga quirk to ACK MSI interrupts
- Debug options to disable MSI/X KVM acceleration
- Fix to cleanup MSI-X vectors on shutdown and avoid IRQ route leaks
The KVM-VFIO device support enables KVM to manage how it handles
coherency instructions in the presence of non-coherent I/O. Dave
Airlie had noted that the Nvidia MSI ACK support here may just be
scratching the surface, but it's better than what we have now and
it's only enabled via the x-vga option, so I'm willing to add since
it does enable some users.
# gpg: Signature made Fri 06 Dec 2013 12:28:19 PM PST using RSA key ID 3BB08B22
# gpg: Can't check signature: public key not found
# By Alex Williamson
# Via Alex Williamson
* awilliam/tags/vfio-pci-for-qemu-20131206.0:
vfio-pci: Release all MSI-X vectors when disabled
vfio-pci: Add debug config options to disable MSI/X KVM support
vfio-pci: Fix Nvidia MSI ACK through 0x88000 quirk
vfio-pci: Make use of new KVM-VFIO device
linux-headers: Update from v3.13-rc3
Message-id: 20131206204715.16731.12627.stgit@bling.home
Signed-off-by: Anthony Liguori <aliguori@amazon.com>
# By Paolo Bonzini (17) and others
# Via Stefan Hajnoczi
* stefanha/block: (48 commits)
qemu-iotests: filter QEMU monitor \r\n
aio: make aio_poll(ctx, true) block with no fds
block: clean up bdrv_drain_all() throttling comments
qcow2: use start_of_cluster() and offset_into_cluster() everywhere
qemu-img: decrease progress update interval on convert
qemu-img: round down request length to an aligned sector
qemu-img: dynamically adjust iobuffer size during convert
block/iscsi: set bs->bl.opt_transfer_length
block: add opt_transfer_length to BlockLimits
block/iscsi: set bdi->cluster_size
qemu-img: fix usage instruction for qemu-img convert
qemu-img: add support for skipping zeroes in input during convert
qemu-nbd: add doc for option -f
qemu-iotests: add test for snapshot in qemu-img convert
qemu-img: add -l for snapshot in convert
qemu-iotests: add 058 internal snapshot export with qemu-nbd case
qemu-nbd: support internal snapshot export
snapshot: distinguish id and name in load_tmp
qemu-iotests: Split qcow2 only cases in 048
qemu-iotests: Clean up spaces in usage output
...
Message-id: 1386347807-27359-1-git-send-email-stefanha@redhat.com
Signed-off-by: Anthony Liguori <aliguori@amazon.com>
# By Alex Williamson (1) and others
# Via Paolo Bonzini
* qemu-kvm/uq/master:
target-i386: fix cpuid leaf 0x0d
qemu: mempath: prefault pages manually (v4)
kvm: Query KVM for available memory slots
Message-id: 1386345276-9803-1-git-send-email-pbonzini@redhat.com
Signed-off-by: Anthony Liguori <aliguori@amazon.com>
Update vgabios, switch from lgplvgabios to seavgabios.
Update build process to build both 128k and 256k bios versions.
Use 256k bios for pc-*-2.0+ machine types.
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Merge remote-tracking branch 'kraxel/tags/pull-seabios-31b8b4e-1' into staging
Update seabios to master snapshot (pre-1.7.4).
Update vgabios, switch from lgplvgabios to seavgabios.
Update build process to build both 128k and 256k bios versions.
Use 256k bios for pc-*-2.0+ machine types.
# gpg: Signature made Fri 06 Dec 2013 12:01:24 AM PST using RSA key ID D3E87138
# gpg: Can't check signature: public key not found
# By Gerd Hoffmann
# Via Gerd Hoffmann
* kraxel/tags/pull-seabios-31b8b4e-1:
pc: switch 2.0 machine types to large seabios binary
roms: update vgabios binaries
roms: update seabios binaries
roms: enable seabios cross builds
roms: build two seabios binaries
roms: update seabios submodule to 31b8b4eea9d9ad58a73b22a6060d3ac1c419c26d
add firmware to machine options
add pc-{i440fx,q35}-2.0 machine types
Message-id: 1386322527-23148-1-git-send-email-kraxel@redhat.com
Signed-off-by: Anthony Liguori <aliguori@amazon.com>
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Merge remote-tracking branch 'kwolf/tags/for-anthony' into staging
Block patches for 2.0 (flushing block-next)
# gpg: Signature made Fri 29 Nov 2013 08:43:18 AM PST using RSA key ID C88F2FD6
# gpg: Can't check signature: public key not found
# By Peter Lieven (17) and others
# Via Kevin Wolf
* kwolf/tags/for-anthony: (41 commits)
qemu-iotests: Add sample image and test for VMDK version 3
vmdk: Allow read only open of VMDK version 3
qemu-iotests: Filter out 'qemu-io> ' prompt
qemu-iotests: Filter qemu-io output in 025
block: Use BDRV_O_NO_BACKING where appropriate
qemu-iotests: Test snapshot mode
block: Enable BDRV_O_SNAPSHOT with driver-specific options
qemu-iotests: Make test case 030, 040 and 055 deterministic
qemu-iotest: Add pause_drive and resume_drive methods
blkdebug: add "remove_break" command
qemu-iotests: Drop local version of cancel_and_wait from 040
sheepdog: support user-defined redundancy option
sheepdog: refactor do_sd_create()
qdict: Optimise qdict_do_flatten()
qdict: Fix memory leak in qdict_do_flatten()
MAINTAINERS: add sheepdog development mailing list
COW: Extend checking allocated bits to beyond one sector
COW: Speed up writes
qapi: Change BlockDirtyInfo to list
block: per caller dirty bitmap
...
Message-id: 1385743555-27888-1-git-send-email-kwolf@redhat.com
Signed-off-by: Anthony Liguori <aliguori@amazon.com>
# By Paul Durrant (1) and Wei Liu (1)
# Via Stefano Stabellini
* sstabellini/xen-2013-12-01:
xen-pvdevice: make device-id property compulsory
xen: fix two errors when debug is enabled
Message-id: alpine.DEB.2.02.1312011829000.3198@kaball.uk.xensource.com
Signed-off-by: Anthony Liguori <aliguori@amazon.com>
# By Richard Henderson
# Via Richard Henderson
* rth/auxv-2:
linux-user: Use qemu_getauxval for AT_EXECFD
util: Use qemu_getauxval in linux qemu_cache_utils_init
tcg-s390: Use qemu_getauxval in query_facilities
tcg-arm: Use qemu_getauxval
tcg-ppc64: Use qemu_getauxval
osdep: Create qemu_getauxval and qemu_init_auxval
Message-id: 1385757754-10702-1-git-send-email-rth@twiddle.net
Signed-off-by: Anthony Liguori <aliguori@amazon.com>
# By Erik de Castro Lopo (2) and others
# Via Riku Voipio
* riku/linux-user-for-upstream:
linux-user: pass correct parameter to do_shmctl()
linux-user: create target_structs header to place ipc_perm and shmid_ds
flatload: fix non-GOT relocations
linux-user: Implement handling of 5 POSIX timer syscalls.
linux-user: Add target struct defs needed for POSIX timer syscalls.
Message-id: cover.1385732338.git.riku.voipio@linaro.org
Signed-off-by: Anthony Liguori <aliguori@amazon.com>
Bugfixes for uas emulation.
Add remote wakeup support for ehci.
Add suspend support for xhci.
Misc minor tweaks and fixes.
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Merge remote-tracking branch 'kraxel/tags/pull-usb-1' into staging
Improvements for usb3 bulk stream (usb core, xhci).
Bugfixes for uas emulation.
Add remote wakeup support for ehci.
Add suspend support for xhci.
Misc minor tweaks and fixes.
# gpg: Signature made Thu 28 Nov 2013 11:44:49 PM PST using RSA key ID D3E87138
# gpg: Can't check signature: public key not found
# By Hans de Goede (11) and others
# Via Gerd Hoffmann
* kraxel/tags/pull-usb-1:
usb: move usb_{hi,lo} helpers to header file.
usb: add vendor request defines
trace-events: Clean up after removal of old usb-host code
Revert "usb-tablet: Don't claim wakeup capability for USB-2 version"
ehci: implement port wakeup
xhci: Call usb_device_alloc/free_streams
usb: Add usb_device_alloc/free_streams
usb: Add max_streams attribute to endpoint info
uas: s/ui/iu/
uas: Fix response iu struct definition
uas: Bounds check tags when using streams
uas: Streams are numbered 1-y, rather then 0-x
uas: Fix / cleanup usb_uas_task error handling
uas: Only use report iu-s for task_mgmt status reporting
scsi: Add 2 new sense codes needed by uas
xhci: add support for suspend/resume
xhci: Add a few missing checks for disconnected devices
Message-id: 1385712381-30918-1-git-send-email-kraxel@redhat.com
Signed-off-by: Anthony Liguori <aliguori@amazon.com>
scripts/checkpatch.pl reports about some style problems,
this commit fixes some of them:
ERROR: space prohibited before open square bracket '['
+ .fields = (VMStateField []) {
ERROR: space prohibited after that '!' (ctx:BxW)
+ if (! eeprom->eecs && eecs) {
^
ERROR: space prohibited after that '!' (ctx:WxW)
+ } else if (eeprom->eecs && ! eecs) {
^
ERROR: space prohibited after that '!' (ctx:WxW)
+ } else if (eecs && ! eeprom->eesk && eesk) {
^
ERROR: switch and case should be at the same indent
switch (address >> (eeprom->addrbits - 2)) {
+ case 0:
[...]
+ case 1:
[...]
+ case 2:
[...]
+ case 3:
ERROR: return is not a function, parentheses are not required
+ return (eeprom->eedo);
ERROR: switch and case should be at the same indent
switch (nwords) {
+ case 16:
+ case 64:
[...]
+ case 128:
+ case 256:
[...]
+ default:
Signed-off-by: Antony Pavlov <antonynpavlov@gmail.com>
Cc: Stefan Weil <sw@weilnetz.de>
Reviewed-by: Stefan Weil <sw@weilnetz.de>
Cc: qemu-trivial@nongnu.org
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
We were relying on msix_unset_vector_notifiers() to release all the
vectors when we disable MSI-X, but this only happens when MSI-X is
still enabled on the device. Perform further cleanup by releasing
any remaining vectors listed as in-use after this call. This caused
a leak of IRQ routes on hotplug depending on how the guest OS prepared
the device for removal.
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Cc: qemu-stable@nongnu.org
When MSI is enabled on Nvidia GeForce cards the driver seems to
acknowledge the interrupt by writing a 0xff byte to the MSI capability
ID register using the PCI config space mirror at offset 0x88000 from
BAR0. Without this, the device will only fire a single interrupt.
VFIO handles the PCI capability ID/next registers as virtual w/o write
support, so any write through config space is currently dropped. Add
a check for this and allow the write through the BAR window. The
registers are read-only anyway.
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Add and remove groups from the KVM virtual VFIO device as we make
use of them. This allows KVM to optimize for performance and
correctness based on properties of the group.
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
SMTP does not preserve newlines. This is normally not a problem if the
email body uses DOS or UNIX newlines consistently. In 051.out we mix
UNIX newlines with DOS newlines (since QEMU monitor output uses \r\n).
This patch filters the QEMU monitor output so the golden master file
uses UNIX newlines exclusively.
The result is that patches touching 051.out will apply cleanly without
mangling newlines after this commit.
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
This patch drops a special case where aio_poll(ctx, true) returns false
instead of blocking if no file descriptors are waiting on I/O. Now it
is possible to block in aio_poll() to wait for aio_notify().
This change eliminates busy waiting. bdrv_drain_all() used to rely on
busy waiting to completed throttled I/O requests but this is no longer
required so we can simplify aio_poll().
Note that aio_poll() still returns false when aio_notify() was used. In
other words, stopping a blocking aio_poll() wait is not considered
making progress.
Adjust test-aio /aio/bh/callback-delete/one which assumed aio_poll(ctx,
true) would immediately return false instead of blocking.
Reviewed-by: Alex Bligh <alex@alex.org.uk>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Since cc0681c454 ("block: Enable the new
throttling code in the block layer.") bdrv_drain_all() no longer spins.
The code used to look as follows:
do {
busy = qemu_aio_wait();
/* FIXME: We do not have timer support here, so this is effectively
* a busy wait.
*/
QTAILQ_FOREACH(bs, &bdrv_states, list) {
while (qemu_co_enter_next(&bs->throttled_reqs)) {
busy = true;
}
}
} while (busy);
Note that throttle requests are kicked but I/O throttling limits are
still in effect. The loop spins until the vm_clock time allows the
request to make progress and complete.
The new throttling code introduced bdrv_start_throttled_reqs(). This
function not only kicks throttled requests but also temporarily disables
throttling so requests can run.
The outdated FIXME comment can be removed. Also drop the busy = true
assignment since we overwrite it immediately afterwards.
Reviewed-by: Alex Bligh <alex@alex.org.uk>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
when doing very large jobs updating the progress only every 2%
is too rare.
Signed-off-by: Peter Lieven <pl@kamp.de>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
this patch shortens requests to end at an aligned sector so that
the next request starts aligned.
[Squashed Peter's fix for bdrv_get_info() failure discussed on the
mailing list.
--Stefan]
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Peter Lieven <pl@kamp.de>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
