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hugetlb special casing in filemap.c Content-Language: en-US To: Matthew Wilcox Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, akpm@linux-foundation.org, songmuchun@bytedance.com, mike.kravetz@oracle.com, david@redhat.com, nphamcs@gmail.com, jthoughton@google.com References: <20230609194947.37196-1-sidhartha.kumar@oracle.com> <20230609194947.37196-2-sidhartha.kumar@oracle.com> From: Sidhartha Kumar In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-ClientProxiedBy: BYAPR06CA0034.namprd06.prod.outlook.com (2603:10b6:a03:d4::47) To CH0PR10MB5113.namprd10.prod.outlook.com (2603:10b6:610:c9::8) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: CH0PR10MB5113:EE_|DS0PR10MB6798:EE_ X-MS-Office365-Filtering-Correlation-Id: 39a0336f-ef33-4d9b-729f-08db6926c421 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: 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vendor=baseguard engine=ICAP:2.0.254,Aquarius:18.0.957,Hydra:6.0.573,FMLib:17.11.176.26 definitions=2023-06-09_15,2023-06-09_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 phishscore=0 mlxlogscore=999 malwarescore=0 bulkscore=0 adultscore=0 mlxscore=0 spamscore=0 suspectscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2305260000 definitions=main-2306090171 X-Proofpoint-ORIG-GUID: uj_NsLQV2NQgyhGD3pKTV0p-LdN_PckX X-Proofpoint-GUID: uj_NsLQV2NQgyhGD3pKTV0p-LdN_PckX Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 6/9/23 1:05 PM, Matthew Wilcox wrote: > On Fri, Jun 09, 2023 at 12:49:46PM -0700, Sidhartha Kumar wrote: >> @@ -850,12 +847,9 @@ static inline loff_t folio_file_pos(struct folio *folio) >> >> /* >> * Get the offset in PAGE_SIZE (even for hugetlb folios). >> - * (TODO: hugetlb folios should have ->index in PAGE_SIZE) >> */ >> static inline pgoff_t folio_pgoff(struct folio *folio) >> { >> - if (unlikely(folio_test_hugetlb(folio))) >> - return hugetlb_basepage_index(&folio->page); >> return folio->index; >> } >> > > Unfortunately, you can't split the patches like this. If somebody's > running a git bisect for an entirely different problem and lands on the > boundary between these two patches, they'll have a non-functional kernel > (at least if they're using hugetlbfs). So these two patches have to be > combined. Maybe there's another way to split up the patches, but I > don't immediately see it. Maybe after I read more of them. While this is under review, should I keep it split so the filemap and hugetlb parts are separate and easier to review or should I combine these two patches together for the v2 immediately? Thanks