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| author | Vic Yang <victoryang@google.com> | 2019-01-29 20:23:16 -0800 |
|---|---|---|
| committer | Vic Yang <victoryang@google.com> | 2019-01-30 22:13:13 -0800 |
| commit | bb7e1236f3676baffd5953061154e9a3552317d7 (patch) | |
| tree | a1ddb820db657e34a56e66dd81a0b04a46922673 /linker/linker_main.cpp | |
| parent | 58dd1cbd7f2a0b8a779f2f43c45447cdccc09c3e (diff) | |
Purge linker block allocators before leaving linker
This is the second attempt to purge linker block allocators. Unlike the
previously reverted change which purge allocators whenever all objects
are freed, we only purge right before control leaves the linker. This
limits the performance impact to one munmap() call per dlopen(), in
most cases.
Bug: 112073665
Test: Boot and check memory usage with 'showmap'.
Test: Run camear cold start performance test.
Change-Id: I02c7c44935f768e065fbe7ff0389a84bd44713f0
Diffstat (limited to 'linker/linker_main.cpp')
| -rw-r--r-- | linker/linker_main.cpp | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/linker/linker_main.cpp b/linker/linker_main.cpp index b0c27dcd6..7486cd79b 100644 --- a/linker/linker_main.cpp +++ b/linker/linker_main.cpp @@ -503,6 +503,10 @@ static ElfW(Addr) linker_main(KernelArgumentBlock& args, const char* exe_to_load fflush(stdout); #endif + // We are about to hand control over to the executable loaded. We don't want + // to leave dirty pages behind unnecessarily. + purge_unused_memory(); + ElfW(Addr) entry = exe_info.entry_point; TRACE("[ Ready to execute \"%s\" @ %p ]", si->get_realpath(), reinterpret_cast<void*>(entry)); return entry; |