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| author | Todd Kennedy <toddke@google.com> | 2021-05-26 10:55:50 -0700 |
|---|---|---|
| committer | Todd Kennedy <toddke@google.com> | 2021-05-28 02:59:47 +0000 |
| commit | e41b029d8530d29eb18937662da8c5ea2939dda7 (patch) | |
| tree | 56a61c4a9524264bdb27ec92f4d6f97b3d9cc6eb /core/jni/AndroidRuntime.cpp | |
| parent | ee4d86d0c1f04fdb676ae67d508ca92b167c30b9 (diff) | |
Release cblocks back to the free pool
Modern f2fs implementations starting in S support compression
natively within the file system. The data blocks of specific
installation artifacts [eg. .apk, .so, ...] can be compressed
at the file system level, making them look and act like any
other uncompressed file, but consuming a fraction of the space.
However, the unused space is not free'd automatically. Instead,
we must manually tell the file system to release the extra
blocks [the delta between the compressed and uncompressed block
counts] back to the free pool.
Because of how compression works within the file system, once
the blocks have been released, the file becomes read-only and
cannot be modified until the free'd blocks have again been
reserved from the free pool. For these installation artifacts,
that is not a concern.
Test: atest CtsAppSecurityHostTestCases:SplitTests
Test: atest CtsAppSecurityHostTestCases:IsolatedSplitsTests
Test: atest CtsAppSecurityHostTestCases:PkgInstallSignatureVerificationTest
Test: atest CtsLibnativehelperTestCases
Test: atest PackageManagerTests
Test: Manual. Boot the device and see cblocks for stub APKs are released
Test: Manual. Disable and re-enable stub APK and see cblocks are released
Bug: 188928405
Change-Id: I4b29dab263d02a79d7b1593d35ae28101d33679a
Diffstat (limited to 'core/jni/AndroidRuntime.cpp')
| -rw-r--r-- | core/jni/AndroidRuntime.cpp | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/core/jni/AndroidRuntime.cpp b/core/jni/AndroidRuntime.cpp index 7e8fc7e6ba4f..dca5d969257b 100644 --- a/core/jni/AndroidRuntime.cpp +++ b/core/jni/AndroidRuntime.cpp @@ -190,6 +190,7 @@ extern int register_android_content_res_ObbScanner(JNIEnv* env); extern int register_android_content_res_Configuration(JNIEnv* env); extern int register_android_animation_PropertyValuesHolder(JNIEnv *env); extern int register_android_security_Scrypt(JNIEnv *env); +extern int register_com_android_internal_content_F2fsUtils(JNIEnv* env); extern int register_com_android_internal_content_NativeLibraryHelper(JNIEnv *env); extern int register_com_android_internal_content_om_OverlayConfig(JNIEnv *env); extern int register_com_android_internal_net_NetworkUtilsInternal(JNIEnv* env); @@ -1621,6 +1622,7 @@ static const RegJNIRec gRegJNI[] = { REG_JNI(register_android_animation_PropertyValuesHolder), REG_JNI(register_android_security_Scrypt), + REG_JNI(register_com_android_internal_content_F2fsUtils), REG_JNI(register_com_android_internal_content_NativeLibraryHelper), REG_JNI(register_com_android_internal_os_DmabufInfoReader), REG_JNI(register_com_android_internal_os_FuseAppLoop), |