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From: Baoquan He <bhe@redhat.com>
To: Mike Rapoport <rppt@kernel.org>
Cc: linux-kernel@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org, catalin.marinas@arm.com,
	ardb@kernel.org, guanghuifeng@linux.alibaba.com,
	mark.rutland@arm.com, will@kernel.org, linux-mm@kvack.org,
	thunder.leizhen@huawei.com, wangkefeng.wang@huawei.com,
	kexec@lists.infradead.org
Subject: Re: [PATCH 1/2] arm64, kdump: enforce to take 4G as the crashkernel low memory end
Date: Mon, 5 Sep 2022 20:08:16 +0800	[thread overview]
Message-ID: <YxXmsKYGTd1+/U12@MiWiFi-R3L-srv> (raw)
In-Reply-To: <YxXPannyTqBZInAt@kernel.org>

On 09/05/22 at 01:28pm, Mike Rapoport wrote:
> On Thu, Sep 01, 2022 at 08:25:54PM +0800, Baoquan He wrote:
> > On 09/01/22 at 10:24am, Mike Rapoport wrote:
> > 
> > max_zone_phys() only handles cases when CONFIG_ZONE_DMA/DMA32 enabled,
> > the disabledCONFIG_ZONE_DMA/DMA32 case is not included. I can change
> > it like:
> > 
> > static phys_addr_t __init crash_addr_low_max(void)
> > {
> >         phys_addr_t low_mem_mask = U32_MAX;
> >         phys_addr_t phys_start = memblock_start_of_DRAM();
> > 
> >         if ((!IS_ENABLED(CONFIG_ZONE_DMA) && !IS_ENABLED(CONFIG_ZONE_DMA32)) ||
> >              (phys_start > U32_MAX))
> >                 low_mem_mask = PHYS_ADDR_MAX;
> > 
> >         return low_mem_mast + 1;
> > }
> > 
> > or add the disabled CONFIG_ZONE_DMA/DMA32 case into crash_addr_low_max()
> > as you suggested. Which one do you like better?
> > 
> > static phys_addr_t __init crash_addr_low_max(void)
> > {
> >         if (!IS_ENABLED(CONFIG_ZONE_DMA) && !IS_ENABLED(CONFIG_ZONE_DMA32))
> > 		return PHYS_ADDR_MAX + 1;
> > 
> >         return max_zone_phys(32);
> > }
>  
> I like the second variant better.

Sure, will change to use the 2nd one . Thanks.


_______________________________________________
kexec mailing list
kexec@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/kexec

WARNING: multiple messages have this Message-ID (diff)
From: Baoquan He <bhe@redhat.com>
To: Mike Rapoport <rppt@kernel.org>
Cc: linux-kernel@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org, catalin.marinas@arm.com,
	ardb@kernel.org, guanghuifeng@linux.alibaba.com,
	mark.rutland@arm.com, will@kernel.org, linux-mm@kvack.org,
	thunder.leizhen@huawei.com, wangkefeng.wang@huawei.com,
	kexec@lists.infradead.org
Subject: Re: [PATCH 1/2] arm64, kdump: enforce to take 4G as the crashkernel low memory end
Date: Mon, 5 Sep 2022 20:08:16 +0800	[thread overview]
Message-ID: <YxXmsKYGTd1+/U12@MiWiFi-R3L-srv> (raw)
In-Reply-To: <YxXPannyTqBZInAt@kernel.org>

On 09/05/22 at 01:28pm, Mike Rapoport wrote:
> On Thu, Sep 01, 2022 at 08:25:54PM +0800, Baoquan He wrote:
> > On 09/01/22 at 10:24am, Mike Rapoport wrote:
> > 
> > max_zone_phys() only handles cases when CONFIG_ZONE_DMA/DMA32 enabled,
> > the disabledCONFIG_ZONE_DMA/DMA32 case is not included. I can change
> > it like:
> > 
> > static phys_addr_t __init crash_addr_low_max(void)
> > {
> >         phys_addr_t low_mem_mask = U32_MAX;
> >         phys_addr_t phys_start = memblock_start_of_DRAM();
> > 
> >         if ((!IS_ENABLED(CONFIG_ZONE_DMA) && !IS_ENABLED(CONFIG_ZONE_DMA32)) ||
> >              (phys_start > U32_MAX))
> >                 low_mem_mask = PHYS_ADDR_MAX;
> > 
> >         return low_mem_mast + 1;
> > }
> > 
> > or add the disabled CONFIG_ZONE_DMA/DMA32 case into crash_addr_low_max()
> > as you suggested. Which one do you like better?
> > 
> > static phys_addr_t __init crash_addr_low_max(void)
> > {
> >         if (!IS_ENABLED(CONFIG_ZONE_DMA) && !IS_ENABLED(CONFIG_ZONE_DMA32))
> > 		return PHYS_ADDR_MAX + 1;
> > 
> >         return max_zone_phys(32);
> > }
>  
> I like the second variant better.

Sure, will change to use the 2nd one . Thanks.


_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

WARNING: multiple messages have this Message-ID (diff)
From: Baoquan He <bhe@redhat.com>
To: Mike Rapoport <rppt@kernel.org>
Cc: linux-kernel@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org, catalin.marinas@arm.com,
	ardb@kernel.org, guanghuifeng@linux.alibaba.com,
	mark.rutland@arm.com, will@kernel.org, linux-mm@kvack.org,
	thunder.leizhen@huawei.com, wangkefeng.wang@huawei.com,
	kexec@lists.infradead.org
Subject: Re: [PATCH 1/2] arm64, kdump: enforce to take 4G as the crashkernel low memory end
Date: Mon, 5 Sep 2022 20:08:16 +0800	[thread overview]
Message-ID: <YxXmsKYGTd1+/U12@MiWiFi-R3L-srv> (raw)
In-Reply-To: <YxXPannyTqBZInAt@kernel.org>

On 09/05/22 at 01:28pm, Mike Rapoport wrote:
> On Thu, Sep 01, 2022 at 08:25:54PM +0800, Baoquan He wrote:
> > On 09/01/22 at 10:24am, Mike Rapoport wrote:
> > 
> > max_zone_phys() only handles cases when CONFIG_ZONE_DMA/DMA32 enabled,
> > the disabledCONFIG_ZONE_DMA/DMA32 case is not included. I can change
> > it like:
> > 
> > static phys_addr_t __init crash_addr_low_max(void)
> > {
> >         phys_addr_t low_mem_mask = U32_MAX;
> >         phys_addr_t phys_start = memblock_start_of_DRAM();
> > 
> >         if ((!IS_ENABLED(CONFIG_ZONE_DMA) && !IS_ENABLED(CONFIG_ZONE_DMA32)) ||
> >              (phys_start > U32_MAX))
> >                 low_mem_mask = PHYS_ADDR_MAX;
> > 
> >         return low_mem_mast + 1;
> > }
> > 
> > or add the disabled CONFIG_ZONE_DMA/DMA32 case into crash_addr_low_max()
> > as you suggested. Which one do you like better?
> > 
> > static phys_addr_t __init crash_addr_low_max(void)
> > {
> >         if (!IS_ENABLED(CONFIG_ZONE_DMA) && !IS_ENABLED(CONFIG_ZONE_DMA32))
> > 		return PHYS_ADDR_MAX + 1;
> > 
> >         return max_zone_phys(32);
> > }
>  
> I like the second variant better.

Sure, will change to use the 2nd one . Thanks.



  reply	other threads:[~2022-09-05 15:27 UTC|newest]

Thread overview: 54+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-08-28  0:55 [PATCH 0/2] arm64, kdump: enforce to take 4G as the crashkernel low memory end Baoquan He
2022-08-28  0:55 ` Baoquan He
2022-08-28  0:55 ` Baoquan He
2022-08-28  0:55 ` [PATCH 1/2] " Baoquan He
2022-08-28  0:55   ` Baoquan He
2022-08-28  0:55   ` Baoquan He
2022-08-31  1:50   ` Leizhen (ThunderTown)
2022-08-31  1:50     ` Leizhen (ThunderTown)
2022-08-31  1:50     ` Leizhen (ThunderTown)
2022-08-31  7:37   ` Mike Rapoport
2022-08-31  7:37     ` Mike Rapoport
2022-08-31  7:37     ` Mike Rapoport
2022-08-31 14:29     ` Baoquan He
2022-08-31 14:29       ` Baoquan He
2022-08-31 14:29       ` Baoquan He
2022-09-01  7:24       ` Mike Rapoport
2022-09-01  7:24         ` Mike Rapoport
2022-09-01  7:24         ` Mike Rapoport
2022-09-01 12:25         ` Baoquan He
2022-09-01 12:25           ` Baoquan He
2022-09-01 12:25           ` Baoquan He
2022-09-05 10:28           ` Mike Rapoport
2022-09-05 10:28             ` Mike Rapoport
2022-09-05 10:28             ` Mike Rapoport
2022-09-05 12:08             ` Baoquan He [this message]
2022-09-05 12:08               ` Baoquan He
2022-09-05 12:08               ` Baoquan He
2022-09-06 13:05               ` Ard Biesheuvel
2022-09-06 13:05                 ` Ard Biesheuvel
2022-09-06 13:05                 ` Ard Biesheuvel
2022-09-08 13:33                 ` Baoquan He
2022-09-08 13:33                   ` Baoquan He
2022-09-08 13:33                   ` Baoquan He
2022-09-08 22:55                   ` Baoquan He
2022-09-08 22:55                     ` Baoquan He
2022-09-08 22:55                     ` Baoquan He
2022-09-21  7:45                 ` Mike Rapoport
2022-09-21  7:45                   ` Mike Rapoport
2022-09-21  7:45                   ` Mike Rapoport
2022-09-30  7:04                   ` Baoquan He
2022-09-30  7:04                     ` Baoquan He
2022-09-30  7:04                     ` Baoquan He
2022-09-30  9:24                     ` Baoquan He
2022-09-30  9:24                       ` Baoquan He
2022-09-30  9:24                       ` Baoquan He
2022-08-28  0:55 ` [PATCH 2/2] arm64: remove unneed defer_reserve_crashkernel() and crash_mem_map Baoquan He
2022-08-28  0:55   ` Baoquan He
2022-08-28  0:55   ` Baoquan He
2022-08-31  1:51   ` Leizhen (ThunderTown)
2022-08-31  1:51     ` Leizhen (ThunderTown)
2022-08-31  1:51     ` Leizhen (ThunderTown)
2022-08-28  1:57 ` [PATCH 0/2] arm64, kdump: enforce to take 4G as the crashkernel low memory end Baoquan He
2022-08-28  1:57   ` Baoquan He
2022-08-28  1:57   ` Baoquan He

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