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Mon, 2 Nov 2026 18:27:07 +0000 (GMT) Received: from localhost.localdomain (unknown [9.39.25.71]) by smtpav05.fra02v.mail.ibm.com (Postfix) with ESMTP; Mon, 2 Nov 2026 18:27:06 +0000 (GMT) From: Ojaswin Mujoo Date: Mon, 02 Nov 2026 23:56:21 +0530 Subject: [PATCH 6/8] ext4: make sure zero range WRITE_ZEROES uses NO_CONV_ACC flag X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20261102-ext4-endio-zero-bug-v1-6-266d2bb9e6dc@linux.ibm.com> References: <20261102-ext4-endio-zero-bug-v1-0-266d2bb9e6dc@linux.ibm.com> In-Reply-To: <20261102-ext4-endio-zero-bug-v1-0-266d2bb9e6dc@linux.ibm.com> To: "Theodore Ts'o" , Andreas Dilger , Baokun Li , Jan Kara , "Ritesh Harjani (IBM)" , Zhang Yi Cc: linux-ext4@vger.kernel.org, linux-kernel@vger.kernel.org X-Mailer: b4 0.14.3 X-TM-AS-GCONF: 00 X-Proofpoint-Reinject: loops=2 maxloops=12 X-Proofpoint-GUID: Q4jXjvtoY0OWVgE_iAaOC8Oje8__IItH X-Proofpoint-ORIG-GUID: 73yv250hHCP7479WIaVPh5oSfxbeqxTz X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYxMTAyMDA3MiBTYWx0ZWRfXzK2YcEuiQ+jR BwmMZIzRdH4mQNrHY9NBbd5ADd6xgMy5O0Zl/kSY8z1irXP0cAplsvphCvGQ8+q9SbVUER2bLPC JeoXnmZOejXpHLce91SZrVimb7T2QoOSDBI164sG8xdkQ3lSQZI8mFgzsbwKi+f7hLB+DQrrEVT ExpvsvvqhuXiFYl70wpoAxpZ1lBZLEHDu/Ljg8FI7gzp6+cVSv+Lt3fNG85yzika+aM+jTANwbn fmcS4Pd/bdoJP2VnlpmkiyKt0BzaddZCIH1w74b8IUZ/bxuZQ/LkHFrP2EizcCP/KC2FaID/XMe jbWk5VzkZBK1mEvazWn+13hPMoEY8bjdzRSTk4UqUGXjyuKwy/DRqPLxacNJv/m2H7LrauWbQWk POkfuEDLbXwRYNVM4i0ZxtKanU5vsFZ642u4BI+88YAbIaKPiZ9S4or5plitUesYO382WOLuq44 dY2+xC4rMcP18g/scFA== X-Proofpoint-Spam-Info: AW1haW4tMjYxMTAyMDA3MiBTYWx0ZWRfX/CMRUH2fuihg 0um/GnogSSmcayWZaOEd6oP6ums20bEXHYnbAGRsYAJd0rjysKuXj8LVAFws2I+gk8Kpulrokcr 0LzFZCV1l9TadknX3YIGUSKLJCXukAc= X-Authority-Analysis: v=2.4 cv=FIqOVOos c=1 sm=1 tr=0 ts=6ae8d600 cx=c_pps a=AfN7/Ok6k8XGzOShvHwTGQ==:117 a=AfN7/Ok6k8XGzOShvHwTGQ==:17 a=IkcTkHD0fZMA:10 a=zJRp6_cAMcgA:10 a=VkNPw1HP01LnGYTKEx00:22 a=RnoormkPH1_aCDwRdu11:22 a=uAbxVGIbfxUO_5tXvNgY:22 a=VnNF1IyMAAAA:8 a=xqtzGnP-aES5OxGh3-QA:9 a=QEXdDO2ut3YA:10 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1176,Hydra:6.1.138,FMLib:17.12.100.49 definitions=2026-11-02_05,2026-11-02_03,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 adultscore=0 malwarescore=0 impostorscore=0 spamscore=0 lowpriorityscore=0 bulkscore=0 suspectscore=0 clxscore=1015 priorityscore=1501 phishscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2610300000 definitions=main-2611020072 A zero range WRITE_ZEROES splits and converts an unwrit -> written extent but it doesn't need any protection against the zeroout fallback in ext4_split_extent_zeroout() because it's data is just zeroes anyways. Hence, indicate to the zeroout code that the caller doesn't account for itself in ei->i_conv_pending_ios. Fixes: ea96cb5c4ae3 ("ext4: don't split extent before submitting I/O") Signed-off-by: Ojaswin Mujoo --- fs/ext4/extents.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/fs/ext4/extents.c b/fs/ext4/extents.c index e4e65f3f576d..d546001fedc6 100644 --- a/fs/ext4/extents.c +++ b/fs/ext4/extents.c @@ -4765,7 +4765,7 @@ static int ext4_alloc_file_blocks(struct file *file, loff_t offset, loff_t len, ret = ext4_convert_unwritten_extents(handle, inode, (loff_t)map.m_lblk << blkbits, (loff_t)map.m_len << blkbits, - &converted, 0); + &converted, EXT4_GET_BLOCKS_NO_CONV_ACC); if (ret) map.m_len = converted; -- 2.55.0