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Groups > linux.kernel > #1460343 > unrolled thread
| Started by | Xishi Qiu <qiuxishi@huawei.com> |
|---|---|
| First post | 2016-08-11 11:50 +0200 |
| Last post | 2016-08-11 12:10 +0200 |
| Articles | 2 — 2 participants |
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arm64: why set SECTION_SIZE_BITS to 1G size? Xishi Qiu <qiuxishi@huawei.com> - 2016-08-11 11:50 +0200
Re: arm64: why set SECTION_SIZE_BITS to 1G size? Catalin Marinas <catalin.marinas@arm.com> - 2016-08-11 12:10 +0200
| From | Xishi Qiu <qiuxishi@huawei.com> |
|---|---|
| Date | 2016-08-11 11:50 +0200 |
| Subject | arm64: why set SECTION_SIZE_BITS to 1G size? |
| Message-ID | <s4UMG-24i-25@gated-at.bofh.it> |
Hi everyone: arm64: SECTION_SIZE_BITS 30 -----1G The memory hotplug(add_memory -->check_hotplug_memory_range) must be aligned with section.So I can not add mem with 64M ... Can I modify the SECTION_SIZE_BITS to 26? Thanks, Xishi Qiu
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| From | Catalin Marinas <catalin.marinas@arm.com> |
|---|---|
| Date | 2016-08-11 12:10 +0200 |
| Message-ID | <s4V63-2qB-59@gated-at.bofh.it> |
| In reply to | #1460343 |
On Thu, Aug 11, 2016 at 05:44:46PM +0800, Xishi Qiu wrote: > arm64: > SECTION_SIZE_BITS 30 -----1G > > The memory hotplug(add_memory -->check_hotplug_memory_range) > must be aligned with section.So I can not add mem with 64M ... > Can I modify the SECTION_SIZE_BITS to 26? There was a patch to reduce this to 27: http://lkml.kernel.org/g/1465821119-3384-1-git-send-email-jszhang@marvell.com Also some discussions in this thread on a different patch: http://lkml.iu.edu/hypermail/linux/kernel/1604.1/03036.html Does your system really have such small alignment memory blocks? -- Catalin
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