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vold: remove overprovision area from free segments

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overprovision space and reserved area should be subtracted when we
calculate free segments count in GC for data blocks.

Test: check Vold setGCUrgentPace log
Bug: 202283480
Bug: 181079477
Signed-off-by: Daeho Jeong <daehojeong@google.com>
Change-Id: I7b749588ff794ff0429e17a787d83bcc19af0ec1
This commit is contained in:
Daeho Jeong 2022-03-25 10:02:57 -07:00
parent 0b5f397e2b
commit 3ccdeb3fbb
1 changed files with 15 additions and 1 deletions
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16
IdleMaint.cpp
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@ -547,7 +547,9 @@ void SetGCUrgentPace(int32_t neededSegments, int32_t minSegmentThreshold, float
std::string dirtySegmentsPath = f2fsSysfsPath + "/dirty_segments";
std::string gcSleepTimePath = f2fsSysfsPath + "/gc_urgent_sleep_time";
std::string gcUrgentModePath = f2fsSysfsPath + "/gc_urgent";
std::string freeSegmentsStr, dirtySegmentsStr;
std::string ovpSegmentsPath = f2fsSysfsPath + "/ovp_segments";
std::string reservedBlocksPath = f2fsSysfsPath + "/reserved_blocks";
std::string freeSegmentsStr, dirtySegmentsStr, ovpSegmentsStr, reservedBlocksStr;
if (!ReadFileToString(freeSegmentsPath, &freeSegmentsStr)) {
PLOG(WARNING) << "Reading failed in " << freeSegmentsPath;
@ -559,9 +561,21 @@ void SetGCUrgentPace(int32_t neededSegments, int32_t minSegmentThreshold, float
return;
}
if (!ReadFileToString(ovpSegmentsPath, &ovpSegmentsStr)) {
PLOG(WARNING) << "Reading failed in " << ovpSegmentsPath;
return;
}
if (!ReadFileToString(reservedBlocksPath, &reservedBlocksStr)) {
PLOG(WARNING) << "Reading failed in " << reservedBlocksPath;
return;
}
int32_t freeSegments = std::stoi(freeSegmentsStr);
int32_t dirtySegments = std::stoi(dirtySegmentsStr);
int32_t reservedBlocks = std::stoi(ovpSegmentsStr) + std::stoi(reservedBlocksStr);
freeSegments = freeSegments > reservedBlocks ? freeSegments - reservedBlocks : 0;
neededSegments *= reclaimWeight;
if (freeSegments >= neededSegments) {
LOG(INFO) << "Enough free segments: " << freeSegments