From: Breno Leitao <leitao@debian.org>
To: Yeoreum Yun <yeoreum.yun@arm.com>
Cc: Ard Biesheuvel <ardb@kernel.org>,
Ilias Apalodimas <ilias.apalodimas@linaro.org>,
Borislav Petkov <bp@suse.de>, Andy Lutomirski <luto@kernel.org>,
Kees Cook <kees@kernel.org>, Tony Luck <tony.luck@intel.com>,
"Guilherme G. Piccoli" <gpiccoli@igalia.com>,
Thomas Gleixner <tglx@kernel.org>,
Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
Dave Hansen <dave.hansen@linux.intel.com>,
x86@kernel.org, "H. Peter Anvin" <hpa@zytor.com>,
linux-efi@vger.kernel.org, linux-kernel@vger.kernel.org,
kernel-team@meta.com
Subject: Re: [PATCH v3 5/7] efi/runtime-wrappers: bound the wait for EFI runtime service calls
Date: Fri, 10 Jul 2026 04:14:25 -0700 [thread overview]
Message-ID: <alDTjHtL5Q4ormKb@gmail.com> (raw)
In-Reply-To: <alDMRabP9s6Pqhxq@e129823.arm.com>
On Fri, Jul 10, 2026 at 11:41:09AM +0100, Yeoreum Yun wrote:
> > Hello Yeoreum,
> >
> > On Thu, Jul 09, 2026 at 07:56:18AM +0100, Yeoreum Yun wrote:
> > >
> > > One of my concern is for the UpdateCapsule runtime service.
> > > It might have a case where takes more then 2 mins and there's one
> > > RFC to support a runtime capsule update for arm platform [1].
> >
> > I'm not familiar with UpdateCapsule. Are you suggesting that a 2-minute
> > wait for an EFI call should be acceptable (?!)
> >
> > Wouldn't that trigger stalls and hung-task/wq warnings throughout the
> > kernel?
>
> Might for default config timeout for hung-task. However at least
> its timeout configurable.
>
> TBH, normally it wouldn't task more than 2 mins.
> But for a in case of *slow firmware*, would be good to make
> runtime-service timeout configurable at least?
OK, that is fair request.
I would suggest we do an additional patch with this change, if Ard is
positive on the idea.
Yeoreum, would you like to do it, or should I do it?
next prev parent reply other threads:[~2026-07-10 11:14 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-06-16 12:09 [PATCH v3 0/7] efi/runtime-wrappers: bound the wait for EFI runtime service calls Breno Leitao
2026-06-16 12:09 ` [PATCH v3 1/7] efi: fix stale reference to efi_recover_from_page_fault() Breno Leitao
2026-06-16 12:09 ` [PATCH v3 2/7] efi/runtime-wrappers: factor out efi_rts_park_worker() Breno Leitao
2026-06-16 12:09 ` [PATCH v3 3/7] efi/runtime-wrappers: handle queue_work() failure with goto exit Breno Leitao
2026-06-16 12:09 ` [PATCH v3 4/7] efi/runtime-wrappers: check EFI_RUNTIME_SERVICES before using efi_rts_work Breno Leitao
2026-06-16 12:09 ` [PATCH v3 5/7] efi/runtime-wrappers: bound the wait for EFI runtime service calls Breno Leitao
2026-07-09 6:56 ` Yeoreum Yun
2026-07-10 10:30 ` Breno Leitao
2026-07-10 10:41 ` Yeoreum Yun
2026-07-10 11:14 ` Breno Leitao [this message]
2026-07-10 11:26 ` Yeoreum Yun
2026-07-10 13:47 ` Breno Leitao
2026-06-16 12:09 ` [PATCH v3 6/7] efi/runtime-wrappers: honour EFI_RUNTIME_SERVICES in the non-blocking paths Breno Leitao
2026-06-16 12:09 ` [PATCH v3 7/7] efi/runtime-wrappers: retire the worker if a wedged call ever returns Breno Leitao
2026-07-01 12:28 ` [PATCH v3 0/7] efi/runtime-wrappers: bound the wait for EFI runtime service calls Breno Leitao
2026-07-09 5:02 ` Ard Biesheuvel
2026-07-10 10:06 ` Breno Leitao
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