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From:   Zhang Yi <yi.zhang@huawei.com>
To:     <linux-ext4@vger.kernel.org>
CC:     <linux-fsdevel@vger.kernel.org>, <tytso@mit.edu>,
        <adilger.kernel@dilger.ca>, <jack@suse.cz>, <yi.zhang@huawei.com>,
        <yukuai3@huawei.com>
Subject: [RFC PATCH v2 3/7] jbd2: don't abort the journal when freeing buffers
Date:   Wed, 14 Apr 2021 21:47:33 +0800
Message-ID: <20210414134737.2366971-4-yi.zhang@huawei.com>
In-Reply-To: <20210414134737.2366971-1-yi.zhang@huawei.com>
References: <20210414134737.2366971-1-yi.zhang@huawei.com>
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Now, we can make sure to abort the journal once the original buffer was
failed to write back to disk, we can remove the journal abort logic in
jbd2_journal_try_to_free_buffers() which was introduced in
<c044f3d8360d> ("jbd2: abort journal if free a async write error
metadata buffer"), because it may costs and propably not safe.

Signed-off-by: Zhang Yi <yi.zhang@huawei.com>
---
 fs/jbd2/transaction.c | 17 -----------------
 1 file changed, 17 deletions(-)

diff --git a/fs/jbd2/transaction.c b/fs/jbd2/transaction.c
index 9396666b7314..3e0db4953fe4 100644
--- a/fs/jbd2/transaction.c
+++ b/fs/jbd2/transaction.c
@@ -2118,7 +2118,6 @@ int jbd2_journal_try_to_free_buffers(journal_t *journal, struct page *page)
 {
 	struct buffer_head *head;
 	struct buffer_head *bh;
-	bool has_write_io_error = false;
 	int ret = 0;
 
 	J_ASSERT(PageLocked(page));
@@ -2143,26 +2142,10 @@ int jbd2_journal_try_to_free_buffers(journal_t *journal, struct page *page)
 		jbd2_journal_put_journal_head(jh);
 		if (buffer_jbd(bh))
 			goto busy;
-
-		/*
-		 * If we free a metadata buffer which has been failed to
-		 * write out, the jbd2 checkpoint procedure will not detect
-		 * this failure and may lead to filesystem inconsistency
-		 * after cleanup journal tail.
-		 */
-		if (buffer_write_io_error(bh)) {
-			pr_err("JBD2: Error while async write back metadata bh %llu.",
-			       (unsigned long long)bh->b_blocknr);
-			has_write_io_error = true;
-		}
 	} while ((bh = bh->b_this_page) != head);
 
 	ret = try_to_free_buffers(page);
-
 busy:
-	if (has_write_io_error)
-		jbd2_journal_abort(journal, -EIO);
-
 	return ret;
 }
 
-- 
2.25.4