linux-kernel - Re: [f2fs-dev] [PATCH v3] f2fs: fix race of pending

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Message-ID: <CACOAw_zwbmYHbUVUmzGMci9SaSVSrP8NXXavHBSSLxbAEOrMcw@mail.gmail.com>
Date:   Mon, 7 Dec 2020 16:28:28 +0900
From:   Daeho Jeong <daeho43@...il.com>
To:     Chao Yu <yuchao0@...wei.com>
Cc:     linux-kernel@...r.kernel.org,
        linux-f2fs-devel@...ts.sourceforge.net, kernel-team@...roid.com,
        Jaegeuk Kim <jaegeuk@...nel.org>,
        Daeho Jeong <daehojeong@...gle.com>
Subject: Re: [f2fs-dev] [PATCH v3] f2fs: fix race of pending_pages in decompression

> It looks like it will be better to move this into merge condition?
>
>                 if (bio && (!page_is_mergeable(sbi, bio,
>                                         *last_block_in_bio, blkaddr) ||
>                     !f2fs_crypt_mergeable_bio(bio, inode, page->index, NULL) ||
>                         f2fs_verify_mergeable_bio())) {
>

I tried this for the first time, but it requires unnecessary checks
within the compression cluster.
I wanted to just check one time in the beginning of the cluster.
What do you think?