From: Marc Zyngier <marc.zyngier@arm.com>
To: Julien Thierry <julien.thierry@arm.com>,
linux-kernel@vger.kernel.org,
linux-arm-kernel@lists.infradead.org
Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org>,
Jeremy Linton <jeremy.linton@arm.com>,
Jeffrey Hugo <jhugo@codeaurora.org>,
Thomas Gleixner <tglx@linutronix.de>,
Jason Cooper <jason@lakedaemon.net>
Subject: Re: [PATCH 04/10] irqchip/gic-v3-its: Move pending table allocation to init time
Date: Wed, 26 Sep 2018 11:39:03 +0100 [thread overview]
Message-ID: <637c7af3-cce7-4e0b-e049-366ea4b17e25@arm.com> (raw)
In-Reply-To: <7cdac0d7-a256-5e75-5a19-8eb0fb1cf6a5@arm.com>
Hi Julien,
On 24/09/18 12:58, Julien Thierry wrote:
> Hi Marc,
>
> On 21/09/18 20:59, Marc Zyngier wrote:
>> Pending tables for the redistributors are currently allocated
>> one at a time as each CPU boots. This is causing some grief
>> for Linux/RT (allocation from within a CPU hotplug notifier is
>> frown upon).
>>
>> Let's more this allocation to take place at init time, when we
>> only have a single CPU. It means we're allocating memory for CPUs
>> that are not online yet, but most system will boot all of their
>> CPUs anyway, so that's not completely wasted.
>>
>> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
>> ---
>> drivers/irqchip/irq-gic-v3-its.c | 80 +++++++++++++++++++-----------
>> include/linux/irqchip/arm-gic-v3.h | 1 +
>> 2 files changed, 53 insertions(+), 28 deletions(-)
>>
>> diff --git a/drivers/irqchip/irq-gic-v3-its.c b/drivers/irqchip/irq-gic-v3-its.c
>> index 7ef6baea2d78..462bba422189 100644
>> --- a/drivers/irqchip/irq-gic-v3-its.c
>> +++ b/drivers/irqchip/irq-gic-v3-its.c
>> @@ -173,6 +173,7 @@ static DEFINE_RAW_SPINLOCK(vmovp_lock);
>> static DEFINE_IDA(its_vpeid_ida);
>>
>> #define gic_data_rdist() (raw_cpu_ptr(gic_rdists->rdist))
>> +#define gic_data_rdist_cpu(cpu) (per_cpu_ptr(gic_rdists->rdist, cpu))
>> #define gic_data_rdist_rd_base() (gic_data_rdist()->rd_base)
>> #define gic_data_rdist_vlpi_base() (gic_data_rdist_rd_base() + SZ_128K)
>>
>> @@ -1625,7 +1626,7 @@ static void its_free_prop_table(struct page *prop_page)
>> get_order(LPI_PROPBASE_SZ));
>> }
>>
>> -static int __init its_alloc_lpi_tables(void)
>> +static int __init its_alloc_lpi_prop_table(void)
>
> A bit of a nit, but there is already a function called
> "its_allocate_prop_table" which I find very easy to confuse with this one.
>
> And patch 3 factored the initialization out of its_allocate_prop_table.
> So I was wondering whether it would not actually be better to open-code
> it here and get rid of that function. Otherwise I'd suggest having more
> distinct names.
its_allocate_prop_table is also used by the VLPI code to allocate guest
property tables, so I'd rather not open-code it.
How about renaming this function to its_setup_lpi_prop_table?
Thanks,
M.
--
Jazz is not dead. It just smells funny...
next prev parent reply other threads:[~2018-09-26 10:39 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-09-21 19:59 [PATCH 00/10] GICv3 support for kexec/kdump on EFI systems Marc Zyngier
2018-09-21 19:59 ` [PATCH 01/10] irqchip/gic-v3-its: Change initialization ordering for LPIs Marc Zyngier
2018-09-24 10:49 ` Julien Thierry
2018-09-21 19:59 ` [PATCH 02/10] irqchip/gic-v3-its: Consolidate LPI_PENDBASE_SZ usage Marc Zyngier
2018-09-24 10:33 ` Suzuki K Poulose
2018-09-24 10:50 ` Julien Thierry
2018-09-24 10:54 ` Suzuki K Poulose
2018-09-24 10:55 ` Julien Thierry
2018-09-26 10:28 ` Marc Zyngier
2018-09-21 19:59 ` [PATCH 03/10] irqchip/gic-v3-its: Split property table clearing from allocation Marc Zyngier
2018-09-21 19:59 ` [PATCH 04/10] irqchip/gic-v3-its: Move pending table allocation to init time Marc Zyngier
2018-09-24 11:58 ` Julien Thierry
2018-09-26 10:39 ` Marc Zyngier [this message]
2018-09-21 19:59 ` [PATCH 05/10] irqchip/gic-v3-its: Keep track of property table's PA and VA Marc Zyngier
2018-09-21 19:59 ` [PATCH 06/10] irqchip/gic-v3-its: Allow use of pre-programmed LPI tables Marc Zyngier
2018-09-24 12:52 ` Julien Thierry
2018-09-21 19:59 ` [PATCH 07/10] irqchip/gic-v3-its: Use pre-programmed redistributor tables with kdump kernels Marc Zyngier
2018-09-21 19:59 ` [PATCH 08/10] irqchip/gic-v3-its: Check that all RDs have the same property table Marc Zyngier
2018-09-21 19:59 ` [PATCH 09/10] irqchip/gic-v3-its: Register LPI tables with EFI config table Marc Zyngier
2018-09-21 19:59 ` [PATCH 10/10] irqchip/gic-v3-its: Allow use of LPI tables in reserved memory Marc Zyngier
2018-09-25 18:48 ` [PATCH 00/10] GICv3 support for kexec/kdump on EFI systems Jeremy Linton
2018-09-27 9:55 ` Bhupesh Sharma
2018-09-27 13:01 ` Zhang, Lei
2018-09-27 21:10 ` Richard Ruigrok
2018-09-28 10:33 ` Marc Zyngier
[not found] ` <CACiNFG5r2Czfy_kXA2PPQa=xdyzq0vUgoQZ=XNME4d_h=O1oBw@mail.gmail.com>
2019-02-01 9:15 ` Marc Zyngier
2019-02-02 3:05 ` Xulin Sun
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