[PATCH v15 08/13] copy-on-read: skip non-guest reads if no copy needed

From: Andrey Shinkevich If the flag BDRV_REQ_PREFETCH was set, skip idling read/write operations in COR-driver. It can be taken into account for the COR-algorithms optimization. That check is being made during the block stream job by the moment. Add the BDRV_REQ_PREFETCH flag to the supported_re

[PATCH v15 12/13] block/stream: add s->target_bs

Add a direct link to target bs for convenience and to simplify following commit which will insert COR filter above target bs. This is a part of original commit written by Andrey. Signed-off-by: Vladimir Sementsov-Ogievskiy Reviewed-by: Max Reitz --- block/stream.c | 23 ++-

Re: [PATCH] block: report errno when flock fcntl fails

15.12.2020 22:01, David Edmondson wrote: When a call to fcntl(2) for the purpose of manipulating file locks fails, report the error returned by fcntl. Signed-off-by: David Edmondson Reviewed-by: Vladimir Sementsov-Ogievskiy -- Best regards, Vladimir

[PATCH v15 07/13] block: include supported_read_flags into BDS structure

From: Andrey Shinkevich Add the new member supported_read_flags to the BlockDriverState structure. It will control the flags set for copy-on-read operations. Make the block generic layer evaluate supported read flags before they go to a block driver. Suggested-by: Vladimir Sementsov-Ogievskiy S

[PATCH v15 13/13] block: apply COR-filter to block-stream jobs

From: Andrey Shinkevich This patch completes the series with the COR-filter applied to block-stream operations. Adding the filter makes it possible in future implement discarding copied regions in backing files during the block-stream job, to reduce the disk overuse (we need control on permissio

Re: [PATCH] spapr: Fix DR properties of the root node

On Mon, Dec 14, 2020 at 12:19:55PM +0100, Greg Kurz wrote: > Section 13.5.2 of LoPAPR mandates various DR related indentifiers > for all hot-pluggable entities to be exposed in the "ibm,drc-indexes", > "ibm,drc-power-domains", "ibm,drc-names" and "ibm,drc-types" properties > of their parent node. T

Re: [PATCH REPOST] spapr: Allow memory unplug to always succeed

On Mon, Dec 14, 2020 at 11:05:50AM +0100, Greg Kurz wrote: 65;6201;1c> It is currently impossible to hot-unplug a memory device between > machine reset and CAS. > > (qemu) device_del dimm1 > Error: Memory hot unplug not supported for this guest > > This limitation was introduced in order to provi

Are user static builds really dynamically linked ?

user --static builds are apparently resulting in dynamically linked executables (to the glibc library, not other shared objects ) Concise summary: $ file ../qemu-aarch64_v* ../qemu-aarch64_v4.2.1: ELF 64-bit LSB executable, x86-64, version 1 (GNU/Linux), statically linked, BuildID[sha1]=70f5e10a

Re: [PATCH v2 07/11] qapi/introspect.py: Unify return type of _make_tree()

John Snow writes: > On 11/16/20 4:46 AM, Markus Armbruster wrote: >> John Snow writes: >> >>> Returning two different types conditionally can be complicated to >>> type. Let's always return a tuple for consistency. Prohibit the use of >>> annotations with dict-values in this circumstance. It ca

[PATCH] x86/cpu: Add AVX512_FP16 cpu feature

AVX512 Half-precision floating point (FP16) has better performance compared to FP32 if the presicion or magnitude requirements are met. It's defined as CPUID.(EAX=7,ECX=0):EDX[bit 23]. Refer to https://software.intel.com/content/www/us/en/develop/download/\ intel-architecture-instruction-set-exten

Re: [PATCH] hw/arm/virt: Remove virt machine state 'smp_cpus'

On Tue, Dec 15, 2020 at 06:20:48PM +, David Edmondson wrote: > On Tuesday, 2020-12-15 at 18:48:15 +01, Andrew Jones wrote: > > > virt machine's 'smp_cpus' and machine->smp.cpus must always have the > > same value. And, anywhere we have virt machine state we have machine > > state. So let's rem

Re: [PATCH v2 09/11] qapi/introspect.py: create a typed 'Annotated' data strutcure

John Snow writes: > On 11/16/20 5:12 AM, Markus Armbruster wrote: >> John Snow writes: >> >>> This replaces _make_tree with Annotated(). By creating it as a generic >>> container, we can more accurately describe the exact nature of this >>> particular value. i.e., each Annotated object is actua

Re: [PATCH 2/2] accel: kvm: Add aligment check for kvm_log_clear_one_slot

On Tue, Dec 15, 2020 at 12:55:50PM +0100, Andrew Jones wrote: > On Tue, Dec 15, 2020 at 03:19:48PM +0800, Keqian Zhu wrote: > > The parameters start and size are transfered from QEMU memory > > emulation layer. It can promise that they are TARGET_PAGE_SIZE > > aligned. However, KVM needs they are q

Re: [PATCH v5 0/2] MTE support for KVM guest

On Mon, 7 Dec 2020 at 22:48, Steven Price wrote: > > On 04/12/2020 08:25, Haibo Xu wrote: > > On Fri, 20 Nov 2020 at 17:51, Steven Price wrote: > >> > >> On 19/11/2020 19:11, Marc Zyngier wrote: > >>> On 2020-11-19 18:42, Andrew Jones wrote: > On Thu, Nov 19, 2020 at 03:45:40PM +, Peter

Re: [PATCH 1/2] test-char: Destroy chardev correctly at char_file_test_internal()

On Wed, Dec 16, 2020 at 2:41 AM Eduardo Habkost wrote: > commit 1e419ee68fa5 ("chardev: generate an internal id when none > given") changed the reference ownership semantics of > qemu_chardev_new(NULL, ...): now all chardevs created using > qemu_chardev_new() are added to the /chardevs QOM contai

Re: [PATCH v2 05/11] qapi/introspect.py: add preliminary type hint annotations

John Snow writes: > On 11/13/20 11:48 AM, Markus Armbruster wrote: >> John Snow writes: >> >>> The typing of _make_tree and friends is a bit involved, but it can be >>> done with some stubbed out types and a bit of elbow grease. The >>> forthcoming patches attempt to make some simplifications,

Re: [PATCH 2/2] qom: Assert that objects being destroyed have no parent

Hi On Wed, Dec 16, 2020 at 2:41 AM Eduardo Habkost wrote: > QOM reference counting bugs are often hard to detect, but there's > one kind of bug that's easier: if we are freeing an object but is > still attached to a parent, it means the reference count is wrong > (because the parent always hold

<    1   2   3   4   5