Messages in this thread | | | Subject | Re: [PATCH] f2fs: fix a deadlock in fsync | From | Jaegeuk Kim <> | Date | Wed, 07 Aug 2013 18:43:16 +0900 |
| |
Hi Jin,
2013-08-07 (수), 12:23 +0800, Jim Xu: > Hi Kim, > > The patch sounds good to me. > > BTW, as in the deadlock situation I noticed, I did not find any thread was doing checkpoint at that moment. The bdi writeback thread and the fsync user thread was not. Neither was the background f2fs_gc thread because there had enough free segments. Meanwhile, another user thread was blocked in the f2fs_sync_file->sync_node_pages, which, I think, is not a factor contributing to the deadlock.
I indicated one possible scenario. As you described, many fsync calls can also consume all the fs_lock too. Thanks,
-- Jaegeuk Kim Samsung
-- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| |