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The usage pattern implemented in allocator seems to be incompatible with transparent huge pages, as memory released using madvise(MADV_DONTNEED) with regular page size and alignment does not seem to trigger demotion of huge pages back to regular pages, even when significant number of pages is released. Even if demotion is triggered when system memory is low, it still breaks memory accounting.
20 lines
1.0 KiB
Plaintext
20 lines
1.0 KiB
Plaintext
Available configuration variables:
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CONFIG_AUTO_ROUTES Device routes are added automagically by the kernel
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CONFIG_SELF_CONSCIOUS We're able to recognize whether route was installed by us
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CONFIG_MULTIPLE_TABLES The kernel supports multiple routing tables
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CONFIG_SINGLE_ROUTE There is only one route per network
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CONFIG_MC_PROPER_SRC Multicast packets have source address according to socket saddr field
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CONFIG_SKIP_MC_BIND Don't call bind on multicast socket (def for *BSD)
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CONFIG_NO_IFACE_BIND Bind to iface is not available, use workarounds (def for *BSD)
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CONFIG_UNIX_DONTROUTE Use setsockopts DONTROUTE (undef for *BSD)
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CONFIG_DONTROUTE_UNICAST Use MSG_DONTROUTE flag for unicast packets (def for FreeBSD)
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CONFIG_USE_HDRINCL Use IP_HDRINCL instead of control messages for source address on raw IP sockets.
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CONFIG_RESTRICTED_PRIVILEGES Implements restricted privileges using drop_uid()
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CONFIG_MADV_DONTNEED_TO_FREE To free pages, use MADV_DONTNEED instead of MADV_FREE (linux)
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CONFIG_DISABLE_THP Disable transparent huge pages (linux)
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