From: David Woodhouse <dwmw2@infradead.org>
To: paul@xen.org, qemu-devel@nongnu.org
Cc: "Kevin Wolf" <kwolf@redhat.com>,
"Hanna Reitz" <hreitz@redhat.com>,
"Stefano Stabellini" <sstabellini@kernel.org>,
"Anthony Perard" <anthony.perard@citrix.com>,
"Marc-André Lureau" <marcandre.lureau@redhat.com>,
"Paolo Bonzini" <pbonzini@redhat.com>,
"Michael S. Tsirkin" <mst@redhat.com>,
"Marcel Apfelbaum" <marcel.apfelbaum@gmail.com>,
"Richard Henderson" <richard.henderson@linaro.org>,
"Eduardo Habkost" <eduardo@habkost.net>,
"Jason Wang" <jasowang@redhat.com>,
"Marcelo Tosatti" <mtosatti@redhat.com>,
qemu-block@nongnu.org, xen-devel@lists.xenproject.org,
kvm@vger.kernel.org, "Bernhard Beschow" <shentey@gmail.com>,
"Joel Upham" <jupham125@gmail.com>
Subject: Re: [PATCH v3 13/28] hw/xen: automatically assign device index to block devices
Date: Fri, 27 Oct 2023 11:25:08 +0100 [thread overview]
Message-ID: <b6458e730fd861243f534e33a48a857122e77ed5.camel@infradead.org> (raw)
In-Reply-To: <9fb67e52-f262-4cf4-91c2-a42411ba21c4@gmail.com>
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On Fri, 2023-10-27 at 10:01 +0100, Durrant, Paul wrote:
>
> This code is allocating a name automatically so I think the onus is on
> it not create a needless clash which is likely to have unpredictable
> results depending on what the guest is. Just avoid any aliasing in the
> first place and things will be fine.
Yeah, fair enough. In which case I'll probably switch to using
xs_directory() and then processing those results to find a free slot,
instead of going out to XenStore for every existence check.
This isn't exactly fast path and I'm prepared to tolerate a little bit
of O(n²), but only within reason :)
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next prev parent reply other threads:[~2023-10-27 10:25 UTC|newest]
Thread overview: 58+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-10-25 14:50 [PATCH v3 00/28] Get Xen PV shim running in QEMU, add net & console David Woodhouse
2023-10-25 14:50 ` [PATCH v3 01/28] i386/xen: Don't advertise XENFEAT_supervisor_mode_kernel David Woodhouse
2023-10-25 14:50 ` [PATCH v3 02/28] i386/xen: fix per-vCPU upcall vector for Xen emulation David Woodhouse
2023-10-25 14:50 ` [PATCH v3 03/28] hw/xen: select kernel mode for per-vCPU event channel upcall vector David Woodhouse
2023-10-25 14:50 ` [PATCH v3 04/28] hw/xen: don't clear map_track[] in xen_gnttab_reset() David Woodhouse
2023-10-25 14:50 ` [PATCH v3 05/28] hw/xen: fix XenStore watch delivery to guest David Woodhouse
2023-10-27 7:15 ` Durrant, Paul
2023-10-25 14:50 ` [PATCH v3 06/28] hw/xen: take iothread mutex in xen_evtchn_reset_op() David Woodhouse
2023-10-27 7:20 ` Durrant, Paul
2023-10-25 14:50 ` [PATCH v3 07/28] hw/xen: use correct default protocol for xen-block on x86 David Woodhouse
2023-10-27 7:22 ` Durrant, Paul
2023-10-25 14:50 ` [PATCH v3 08/28] i386/xen: Ignore VCPU_SSHOTTMR_future flag in set_singleshot_timer() David Woodhouse
2023-10-27 7:23 ` Durrant, Paul
2023-10-25 14:50 ` [PATCH v3 09/28] hw/xen: Clean up event channel 'type_val' handling to use union David Woodhouse
2023-10-25 14:50 ` [PATCH v3 10/28] include: update Xen public headers to Xen 4.17.2 release David Woodhouse
2023-10-25 14:50 ` [PATCH v3 11/28] i386/xen: advertise XEN_HVM_CPUID_UPCALL_VECTOR in CPUID David Woodhouse
2023-10-25 14:50 ` [PATCH v3 12/28] hw/xen: populate store frontend nodes with XenStore PFN/port David Woodhouse
2023-10-25 14:50 ` [PATCH v3 13/28] hw/xen: automatically assign device index to block devices David Woodhouse
2023-10-27 7:30 ` Durrant, Paul
2023-10-27 8:45 ` David Woodhouse
2023-10-27 9:01 ` Durrant, Paul
2023-10-27 10:25 ` David Woodhouse [this message]
2023-10-27 10:32 ` Durrant, Paul
2023-10-27 12:02 ` David Woodhouse
2023-10-25 14:50 ` [PATCH v3 14/28] hw/xen: add get_frontend_path() method to XenDeviceClass David Woodhouse
2023-10-27 7:31 ` Durrant, Paul
2023-10-25 14:50 ` [PATCH v3 15/28] hw/xen: do not repeatedly try to create a failing backend device David Woodhouse
2023-10-25 14:50 ` [PATCH v3 16/28] hw/xen: update Xen console to XenDevice model David Woodhouse
2023-10-25 14:50 ` [PATCH v3 17/28] hw/xen: add support for Xen primary console in emulated mode David Woodhouse
2023-10-27 7:44 ` Durrant, Paul
2023-10-25 14:50 ` [PATCH v3 18/28] hw/xen: only remove peers of PCI NICs on unplug David Woodhouse
2023-10-27 8:29 ` Durrant, Paul
2023-10-25 14:50 ` [PATCH v3 19/28] hw/xen: update Xen PV NIC to XenDevice model David Woodhouse
2023-10-27 8:42 ` Durrant, Paul
2023-10-25 14:50 ` [PATCH v3 20/28] net: do not delete nics in net_cleanup() David Woodhouse
2023-10-27 8:44 ` Durrant, Paul
2023-10-25 14:50 ` [PATCH v3 21/28] xen-platform: unplug AHCI disks David Woodhouse
2023-10-27 9:08 ` Durrant, Paul
2023-10-25 14:50 ` [PATCH v3 22/28] net: add qemu_{configure, create}_nic_device(), qemu_find_nic_info() David Woodhouse
2023-10-27 9:25 ` [PATCH v3 22/28] net: add qemu_{configure,create}_nic_device(), qemu_find_nic_info() Durrant, Paul
2023-10-25 14:50 ` [PATCH v3 23/28] net: report list of available models according to platform David Woodhouse
2023-10-27 9:31 ` Durrant, Paul
2023-10-25 14:50 ` [PATCH v3 24/28] net: add qemu_create_nic_bus_devices() David Woodhouse
2023-10-27 9:42 ` Durrant, Paul
2023-10-25 14:50 ` [PATCH v3 25/28] hw/pci: add pci_init_nic_devices(), pci_init_nic_in_slot() David Woodhouse
2023-10-27 9:46 ` Durrant, Paul
2023-10-25 14:50 ` [PATCH v3 26/28] hw/i386/pc: use qemu_get_nic_info() and pci_init_nic_devices() David Woodhouse
2023-10-27 9:48 ` Durrant, Paul
2023-10-25 14:50 ` [PATCH v3 27/28] hw/xen: use qemu_create_nic_bus_devices() to instantiate Xen NICs David Woodhouse
2023-10-27 9:52 ` Durrant, Paul
2023-10-25 14:50 ` [PATCH v3 28/28] docs: update Xen-on-KVM documentation David Woodhouse
2023-10-25 18:20 ` Eric Blake
2023-10-25 18:26 ` David Woodhouse
2023-10-25 18:56 ` Andrew Cooper
2023-10-25 19:02 ` David Woodhouse
2023-10-26 8:26 ` Kevin Wolf
2023-10-26 9:25 ` David Woodhouse
2023-10-26 16:25 ` David Woodhouse
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