On Thu, 2 Jul, 2026, 18:24 Gao Xiang, <[email protected]> wrote:
> > > On 2026/7/2 16:10, Nithurshen wrote: > > This patch introduces a multi-threaded pipeline for fsck.erofs, > > combining parallel directory traversal with background pcluster > > decompression to significantly reduce extraction time. > > > > Key architectural changes include: > > > > - Thread-Safe State: Removes the global dirstack array and > > fsckcfg.extract_path. These are replaced with per-task localized > > paths and thread-local linked lists to eliminate data races. > > - Concurrent Traversal: Refactors erofsfsck_dirent_iter to allocate > > task structures and dispatch inode processing to a background > > workqueue (z_erofs_mt_wq). > > - Asynchronous Decompression: Introduces z_erofs_mt_read_ctx to > > batch pcluster reads and decouple decompression from main I/O. > > Limits batch size dynamically (32 for LZ4, 8 for compute-heavy > > algorithms) to balance CPU cache hits and memory overhead. > > - Memory & Deadlock Safety: Implements inline backpressure during > > directory iteration. If pending inodes exceed workqueue capacity, > > execution falls back to synchronous processing to prevent > > recursive thread-pool starvation and unbounded memory growth. > > - Synchronization Primitives: Adds portable condition variable > > wrappers (erofs_cond_t) to ensure the main thread safely waits > > for all pending background inodes before exiting. > > > > Signed-off-by: Nithurshen <[email protected]> > > What's the relationship with the previous two patches? > I made then into one atomic patch, since you wanted them merged at once. Thanks, Nithurshen Thanks, > Gao Xiang >
