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Commit 9e72937f authored by David Anderson's avatar David Anderson Committed by Automerger Merge Worker
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Merge "Enhance checkpoint=disable GC threshold fallback mechanism" am: 2ed2f814 

Original change: https://android-review.googlesource.com/c/platform/system/core/+/1761347

Change-Id: I75fb2e99e93aab1b4816e5af52dc0325c39edc1f
parents 26c6fdd1 2ed2f814

fs_mgr/fs_mgr.cpp

+12 −6
Original line number Diff line number Diff line
@@ -790,20 +790,26 @@ static int __mount(const std::string& source, const std::string& target, const F 
    int save_errno = 0;

    int gc_allowance = 0;

    std::string opts;

    std::string checkpoint_opts;

    bool try_f2fs_gc_allowance = is_f2fs(entry.fs_type) && entry.fs_checkpoint_opts.length() > 0;

    bool try_f2fs_fallback = false;

    Timer t;



    do {

        if (save_errno == EINVAL && try_f2fs_gc_allowance) {

            PINFO << "Kernel does not support checkpoint=disable:[n]%, trying without.";

        if (save_errno == EINVAL && (try_f2fs_gc_allowance || try_f2fs_fallback)) {

            PINFO << "Kernel does not support " << checkpoint_opts << ", trying without.";

            try_f2fs_gc_allowance = false;

            // Attempt without gc allowance before dropping.

            try_f2fs_fallback = !try_f2fs_fallback;

        }

        if (try_f2fs_gc_allowance) {

            opts = entry.fs_options + entry.fs_checkpoint_opts + ":" +

                   std::to_string(gc_allowance) + "%";

            checkpoint_opts = entry.fs_checkpoint_opts + ":" + std::to_string(gc_allowance) + "%";

        } else if (try_f2fs_fallback) {

            checkpoint_opts = entry.fs_checkpoint_opts;

        } else {

            opts = entry.fs_options;

            checkpoint_opts = "";

        }

        opts = entry.fs_options + checkpoint_opts;

        if (save_errno == EAGAIN) {

            PINFO << "Retrying mount (source=" << source << ",target=" << target

                  << ",type=" << entry.fs_type << ", gc_allowance=" << gc_allowance << "%)=" << ret
@@ -814,7 +820,7 @@ static int __mount(const std::string& source, const std::string& target, const F 
        save_errno = errno;

        if (try_f2fs_gc_allowance) gc_allowance += 10;

    } while ((ret && save_errno == EAGAIN && gc_allowance <= 100) ||

             (ret && save_errno == EINVAL && try_f2fs_gc_allowance));

             (ret && save_errno == EINVAL && (try_f2fs_gc_allowance || try_f2fs_fallback)));

    const char* target_missing = "";

    const char* source_missing = "";

    if (save_errno == ENOENT) {