45 lines
1.6 KiB
Plaintext
45 lines
1.6 KiB
Plaintext
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What: /sys/devices/system/memory/soft_offline_page
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Date: Sep 2009
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KernelVersion: 2.6.33
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Contact: andi@firstfloor.org
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Description:
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Soft-offline the memory page containing the physical address
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written into this file. Input is a hex number specifying the
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physical address of the page. The kernel will then attempt
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to soft-offline it, by moving the contents elsewhere or
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dropping it if possible. The kernel will then be placed
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on the bad page list and never be reused.
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The offlining is done in kernel specific granuality.
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Normally it's the base page size of the kernel, but
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this might change.
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The page must be still accessible, not poisoned. The
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kernel will never kill anything for this, but rather
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fail the offline. Return value is the size of the
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number, or a error when the offlining failed. Reading
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the file is not allowed.
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What: /sys/devices/system/memory/hard_offline_page
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Date: Sep 2009
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KernelVersion: 2.6.33
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Contact: andi@firstfloor.org
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Description:
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Hard-offline the memory page containing the physical
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address written into this file. Input is a hex number
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specifying the physical address of the page. The
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kernel will then attempt to hard-offline the page, by
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trying to drop the page or killing any owner or
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triggering IO errors if needed. Note this may kill
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any processes owning the page. The kernel will avoid
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to access this page assuming it's poisoned by the
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hardware.
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The offlining is done in kernel specific granuality.
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Normally it's the base page size of the kernel, but
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this might change.
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Return value is the size of the number, or a error when
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the offlining failed.
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Reading the file is not allowed.
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