a31c7a448b
Add the DEBUG_SLUB_PANIC_ON option to KCONFIG preventing the existing defconfig option from being overwritten by make config. This will induce a panic if slab debug catches corruptions within the padding of a given object. The intention here is to induce collection of data immediately after the corruption is detected with the goal to catch the possible source of the corruption. Change-Id: Ide0102d0761022c643a761989360ae5c853870a8 Signed-off-by: David Keitel <dkeitel@codeaurora.org> [imaund@codeaurora.org: Resolved trivial merge conflicts.] Signed-off-by: Ian Maund <imaund@codeaurora.org> [lmark@codeaurora.org: ensure change does not create arch/arm64/configs/msm8994_defconfig file] Signed-off-by: Liam Mark <lmark@codeaurora.org>
40 lines
1.6 KiB
Text
40 lines
1.6 KiB
Text
config PAGE_EXTENSION
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bool "Extend memmap on extra space for more information on page"
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---help---
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Extend memmap on extra space for more information on page. This
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could be used for debugging features that need to insert extra
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field for every page. This extension enables us to save memory
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by not allocating this extra memory according to boottime
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configuration.
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config DEBUG_PAGEALLOC
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bool "Debug page memory allocations"
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depends on DEBUG_KERNEL
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depends on !HIBERNATION || ARCH_SUPPORTS_DEBUG_PAGEALLOC && !PPC && !SPARC
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depends on !KMEMCHECK
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select PAGE_EXTENSION
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select PAGE_POISONING if !ARCH_SUPPORTS_DEBUG_PAGEALLOC
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---help---
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Unmap pages from the kernel linear mapping after free_pages().
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This results in a large slowdown, but helps to find certain types
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of memory corruption.
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For architectures which don't enable ARCH_SUPPORTS_DEBUG_PAGEALLOC,
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fill the pages with poison patterns after free_pages() and verify
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the patterns before alloc_pages(). Additionally,
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this option cannot be enabled in combination with hibernation as
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that would result in incorrect warnings of memory corruption after
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a resume because free pages are not saved to the suspend image.
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config PAGE_POISONING
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bool
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config SLUB_DEBUG_PANIC_ON
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bool "Enable to Panic on SLUB corruption detection"
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depends on SLUB_DEBUG
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help
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SLUB has a resiliency feature enabled which restores bytes in
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order for production environments to continue to operate. IN
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debug options this may not be desirable as it prevents from
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investigating the root cause which may be rooted within cache
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or memory.
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