From: "Roger Pau Monné" <roger.pau@citrix.com>
To: Andrew Cooper <andrew.cooper3@citrix.com>
Cc: <xen-devel@lists.xenproject.org>, Jan Beulich <jbeulich@suse.com>,
Wei Liu <wl@xen.org>
Subject: Re: [PATCH v3 03/11] x86/vlapic: introduce an EOI callback mechanism
Date: Wed, 31 Mar 2021 14:50:35 +0200 [thread overview]
Message-ID: <YGRwG0B5d+LTNqMK@Air-de-Roger> (raw)
In-Reply-To: <a41aea8e-9ffb-957c-10ca-b70937400f21@citrix.com>
On Wed, Mar 31, 2021 at 12:47:54PM +0100, Andrew Cooper wrote:
> On 31/03/2021 11:32, Roger Pau Monne wrote:
> > @@ -1620,9 +1666,22 @@ int vlapic_init(struct vcpu *v)
> >
> > clear_page(vlapic->regs);
> >
> > + vlapic->callbacks = xmalloc_array(typeof(*vlapic->callbacks),
> > + X86_NR_VECTORS - 16);
> > + if ( !vlapic->callbacks )
> > + {
> > + dprintk(XENLOG_ERR, "%pv: alloc vlapic callbacks error\n", v);
> > + unmap_domain_page_global(vlapic->regs);
> > + free_domheap_page(vlapic->regs_page);
> > + return -ENOMEM;
> > + }
> > + memset(vlapic->callbacks, 0,
> > + sizeof(*vlapic->callbacks) * (X86_NR_VECTORS - 16));
>
> xzalloc_array() instead of memset(). Also, we shouldn't be printing for
> -ENOMEM cases.
>
> As for the construction/teardown logic, vlapic_init()'s caller already
> vlapic_destory(). Therefore, the existing error path you've copied is
> buggy because it will cause a double-free if __map_domain_page_global()
> fails.
Right, let me adjust that path.
> I'll do a cleanup patch to fix the idempotency, which needs backporting too.
Ack, I don't mind doiing one myself either.
Thanks, Roger.
next prev parent reply other threads:[~2021-03-31 12:51 UTC|newest]
Thread overview: 51+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-31 10:32 [PATCH v3 00/11] x86/intr: introduce EOI callbacks and fix vPT Roger Pau Monne
2021-03-31 10:32 ` [PATCH v3 01/11] x86/hvm: drop vcpu parameter from vlapic EOI callbacks Roger Pau Monne
2021-03-31 16:02 ` Jan Beulich
2021-03-31 16:24 ` Andrew Cooper
2021-04-01 9:12 ` Roger Pau Monné
2021-04-01 11:06 ` Jan Beulich
2021-04-07 7:41 ` Roger Pau Monné
2021-04-07 8:19 ` Jan Beulich
2021-03-31 10:32 ` [PATCH v3 02/11] x86/hvm: drop domain parameter from vioapic/vpic " Roger Pau Monne
2021-03-31 16:04 ` Jan Beulich
2021-04-01 9:15 ` Roger Pau Monné
2021-04-01 9:28 ` Jan Beulich
2021-03-31 10:32 ` [PATCH v3 03/11] x86/vlapic: introduce an EOI callback mechanism Roger Pau Monne
2021-03-31 11:47 ` Andrew Cooper
2021-03-31 12:50 ` Roger Pau Monné [this message]
2021-04-07 14:55 ` Jan Beulich
2021-04-07 16:27 ` Roger Pau Monné
2021-04-08 6:20 ` Jan Beulich
2021-04-08 9:12 ` Roger Pau Monné
2021-04-08 10:49 ` Jan Beulich
2021-04-08 10:56 ` Roger Pau Monné
2021-03-31 10:32 ` [PATCH v3 04/11] x86/vmsi: use the newly introduced EOI callbacks Roger Pau Monne
2021-04-07 14:59 ` Jan Beulich
2021-03-31 10:32 ` [PATCH v3 05/11] x86/vioapic: switch to use the EOI callback mechanism Roger Pau Monne
2021-04-07 15:19 ` Jan Beulich
2021-04-07 16:46 ` Roger Pau Monné
2021-04-08 6:27 ` Jan Beulich
2021-04-08 8:59 ` Roger Pau Monné
2021-04-08 10:52 ` Jan Beulich
2021-03-31 10:32 ` [PATCH v3 06/11] x86/hvm: allowing registering EOI callbacks for GSIs Roger Pau Monne
2021-04-07 15:51 ` Jan Beulich
2021-04-07 17:08 ` Roger Pau Monné
2021-04-08 6:34 ` Jan Beulich
2021-04-15 16:04 ` Roger Pau Monné
2021-04-16 7:29 ` Jan Beulich
2021-04-19 8:31 ` Roger Pau Monné
2021-04-08 12:52 ` Roger Pau Monné
2021-04-08 14:31 ` Jan Beulich
2021-04-08 15:06 ` Roger Pau Monné
2021-03-31 10:32 ` [PATCH v3 07/11] x86/dpci: move code Roger Pau Monne
2021-03-31 10:33 ` [PATCH v3 08/11] x86/dpci: switch to use a GSI EOI callback Roger Pau Monne
2021-04-08 14:49 ` Jan Beulich
2021-04-08 15:23 ` Roger Pau Monné
2021-03-31 10:33 ` [PATCH v3 09/11] x86/vpt: switch interrupt injection model Roger Pau Monne
2021-04-14 10:28 ` Jan Beulich
2021-04-14 13:37 ` Roger Pau Monné
2021-04-14 14:05 ` Jan Beulich
2021-04-14 14:20 ` Roger Pau Monné
2021-03-31 10:33 ` [PATCH v3 10/11] x86/vpt: remove vPT timers per-vCPU lists Roger Pau Monne
2021-04-14 10:38 ` Jan Beulich
2021-03-31 10:33 ` [PATCH v3 11/11] x86/vpt: introduce a per-vPT lock Roger Pau Monne
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