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Wed, 01 Dec 2021 05:18:15 +0000 From: Qu Wenruo To: linux-btrfs@vger.kernel.org Date: Wed, 1 Dec 2021 13:17:40 +0800 Message-Id: <20211201051756.53742-2-wqu@suse.com> In-Reply-To: <20211201051756.53742-1-wqu@suse.com> References: <20211201051756.53742-1-wqu@suse.com> MIME-Version: 1.0 X-Mimecast-Impersonation-Protect: Policy=CLT - Impersonation Protection Definition; Similar Internal Domain=false; Similar Monitored External Domain=false; Custom External Domain=false; Mimecast External Domain=false; Newly Observed Domain=false; Internal User Name=false; Custom Display Name List=false; Reply-to Address Mismatch=false; Targeted Threat Dictionary=false; Mimecast Threat Dictionary=false; Custom Threat Dictionary=false X-Scanned-By: MIMEDefang 2.84 on 10.11.54.2 X-MIME-Autoconverted: from quoted-printable to 8bit by lists01.pubmisc.prod.ext.phx2.redhat.com id 1B15IJJu008738 X-loop: dm-devel@redhat.com X-Mailman-Approved-At: Wed, 01 Dec 2021 02:47:50 -0500 Cc: linux-block@vger.kernel.org, dm-devel@redhat.com Subject: [dm-devel] [PATCH 01/17] btrfs: update an stale comment on btrfs_submit_bio_hook() X-BeenThere: dm-devel@redhat.com X-Mailman-Version: 2.1.12 Precedence: junk List-Id: device-mapper development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: dm-devel-bounces@redhat.com Errors-To: dm-devel-bounces@redhat.com X-Scanned-By: MIMEDefang 2.79 on 10.5.11.13 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=dm-devel-bounces@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com This function is renamed to btrfs_submit_data_bio(), update the comment and add extra reason why it doesn't completely follow the same rule in btrfs_submit_data_bio(). Signed-off-by: Qu Wenruo --- fs/btrfs/inode.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c index 504cf090fc88..6079d30f83e8 100644 --- a/fs/btrfs/inode.c +++ b/fs/btrfs/inode.c @@ -8202,7 +8202,13 @@ static inline blk_status_t btrfs_submit_dio_bio(struct bio *bio, bool write = btrfs_op(bio) == BTRFS_MAP_WRITE; blk_status_t ret; - /* Check btrfs_submit_bio_hook() for rules about async submit. */ + /* + * Check btrfs_submit_data_bio() for rules about async submit. + * + * The only exception is for RAID56, when there are more than one bios + * to submit, async submit seems to make it harder to collect csums + * for the full stripe. + */ if (async_submit) async_submit = !atomic_read(&BTRFS_I(inode)->sync_writers);