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Thu, 18 Apr 2019 02:54:02 +0900 (KST) Received: from epsmgms2p1new.samsung.com (unknown [182.195.42.142]) by epcas1p4.samsung.com (KnoxPortal) with ESMTP id 20190417175402epcas1p450f2617234aadf24cb4c8ae184d48c68~WVILRlCsI2081320813epcas1p4L; Wed, 17 Apr 2019 17:54:02 +0000 (GMT) X-AuditID: b6c32a37-f19ff7000000102f-a4-5cb7683a1bc7 Received: from epmmp1.local.host ( [203.254.227.16]) by epsmgms2p1new.samsung.com (Symantec Messaging Gateway) with SMTP id 2E.11.03598.93867BC5; Thu, 18 Apr 2019 02:54:02 +0900 (KST) Received: from test-PowerEdge-R720.sa.corp.samsungelectronics.net ([107.108.221.212]) by mmp1.samsung.com (Oracle Communications Messaging Server 7.0.5.31.0 64bit (built May 5 2014)) with ESMTPA id <0PQ4006MF9PFCC30@mmp1.samsung.com>; Thu, 18 Apr 2019 02:54:01 +0900 (KST) From: Kanchan Joshi To: linux-kernel@vger.kernel.org, linux-block@vger.kernel.org, linux-nvme@lists.infradead.org, linux-fsdevel@vger.kernel.org, linux-ext4@vger.kernel.org Cc: prakash.v@samsung.com, Kanchan Joshi Subject: [PATCH v4 6/7] fs: introduce APIs to enable passing write-hint with buffer-head Date: Wed, 17 Apr 2019 23:20:05 +0530 Message-id: <1555523406-2380-7-git-send-email-joshi.k@samsung.com> X-Mailer: git-send-email 2.7.4 In-reply-to: <1555523406-2380-1-git-send-email-joshi.k@samsung.com> X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFprAIsWRmVeSWpSXmKPExsWy7bCmrq5VxvYYg/NnRC2O/n/LZrH3lrbF zHl32Cz27D3JYnF51xw2i/nLnrJbXJmyiNmB3WPzknqPvi2rGD0+b5ILYI7isklJzcksSy3S t0vgyljcv5q54I1wxfK3S9gaGC8KdDFyckgImEjMP/GQsYuRi0NIYAejxOqds1ghnO+MEnsa 9jLDVE3rboeq2s0o8enAfiYIZzqTxOl57UBVHBxsApoSFyaXgsRFBOYwSizbNw2sm1nATmLG t9esILawQJTEig+tjCA2i4CqxISL89hBbF4BJ4k319qZILbJSdw81wnWyyngLPHoyi02kKES An9ZJVqf72aFKHKROLhiNthiCQFpiUtHbSHCxRK/7hxlhqjvYJS43jCTBSJhL3Fxz18miIP4 JN597WGF6OWV6GgTgijxkOiee5gZ4rFpjBIvO1exT2CUWMDIsIpRLLWgODc9tdiwwFivODG3 uDQvXS85P3cTIzietMx3MG4453OIUYCDUYmHd4Xq9hgh1sSy4srcQ4wSHMxKIryOKVtihHhT EiurUovy44tKc1KLDzFKc7AoifOud3COERJITyxJzU5NLUgtgskycXBKNTCW9u1/u/ql/PpJ LSwxj/PVfmx+/iBr/eaQx18OB+cdjn3aXyXRf6PEribR4ca6rgXCBTP/HOT2lmLYrPXYh+Xw 2lrjyZbzC4qXG/+fnnq3ecaPTydrOI7f+Hcg6+2DXd6eU1T/dTxXncDz9aZkz4Wji2JDzjku N971rYV3yqY680+CXfMZy61nK7EUZyQaajEXFScCAPssPpujAgAA X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFmpgluLIzCtJLcpLzFFi42I5/e+xgK5VxvYYgx3XWC2O/n/LZrH3lrbF zHl32Cz27D3JYnF51xw2i/nLnrJbXJmyiNmB3WPzknqPvi2rGD0+b5ILYI7isklJzcksSy3S t0vgyljcv5q54I1wxfK3S9gaGC8KdDFyckgImEhM625n7GLk4hAS2MkocXDmIihnJpNEw/ct 7F2MHBxsApoSFyaXgsRFBOYwSvTsXs8K0s0sYCcx49trMFtYIEpixYdWRhCbRUBVYsLFeewg Nq+Ak8Sba+1MENvkJG6e62QGsTkFnCUeXbnFBmILAdWcXvWHfQIjzwJGhlWMkqkFxbnpucVG BYZ5qeV6xYm5xaV56XrJ+bmbGIHhsu2wVt8OxvtL4g8xCnAwKvHwrlDdHiPEmlhWXJl7iFGC g1lJhNcxZUuMEG9KYmVValF+fFFpTmrxIUZpDhYlcd7beccihQTSE0tSs1NTC1KLYLJMHJxS DYzi58/f32TSffuOa+nKVyunVKcbn//3/vPG15V/FDynMM30W5B97uzWrzmVEzhteVInBurU 7rybU/HuGVN96blME/k99ZP0Tq2Km3r/y/deqy/+PyxthQ4mzdlrn1EVtWoFf7u/7wZ2Tv6p eyrq2Vw8zfQ0Xdx4vmbmXT24LOmghO/8B6I7b4spsRRnJBpqMRcVJwIA1KGVZRMCAAA= X-CMS-MailID: 20190417175402epcas1p450f2617234aadf24cb4c8ae184d48c68 CMS-TYPE: 101P X-CMS-RootMailID: 20190417175402epcas1p450f2617234aadf24cb4c8ae184d48c68 References: <1555523406-2380-1-git-send-email-joshi.k@samsung.com> Sender: linux-fsdevel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org submit_bh and write_dirty_buffer do not take write-hint as parameter. This introduces variants which do, and pass write-hint to lower layer. Signed-off-by: Kanchan Joshi --- fs/buffer.c | 18 ++++++++++++++++-- include/linux/buffer_head.h | 3 +++ 2 files changed, 19 insertions(+), 2 deletions(-) diff --git a/fs/buffer.c b/fs/buffer.c index ce35760..dc1ea59 100644 --- a/fs/buffer.c +++ b/fs/buffer.c @@ -3105,6 +3105,13 @@ int submit_bh(int op, int op_flags, struct buffer_head *bh) } EXPORT_SYMBOL(submit_bh); +int submit_bh_write_hint(int op, int op_flags, struct buffer_head *bh, + enum rw_hint hint) +{ + return submit_bh_wbc(op, op_flags, bh, hint, NULL); +} +EXPORT_SYMBOL(submit_bh_write_hint); + /** * ll_rw_block: low-level access to block devices (DEPRECATED) * @op: whether to %READ or %WRITE @@ -3162,6 +3169,13 @@ EXPORT_SYMBOL(ll_rw_block); void write_dirty_buffer(struct buffer_head *bh, int op_flags) { + write_dirty_buffer_with_hint(bh, op_flags, 0); +} +EXPORT_SYMBOL(write_dirty_buffer); + +void write_dirty_buffer_with_hint(struct buffer_head *bh, int op_flags, + enum rw_hint hint) +{ lock_buffer(bh); if (!test_clear_buffer_dirty(bh)) { unlock_buffer(bh); @@ -3169,9 +3183,9 @@ void write_dirty_buffer(struct buffer_head *bh, int op_flags) } bh->b_end_io = end_buffer_write_sync; get_bh(bh); - submit_bh(REQ_OP_WRITE, op_flags, bh); + submit_bh_wbc(REQ_OP_WRITE, op_flags, bh, hint, NULL); } -EXPORT_SYMBOL(write_dirty_buffer); +EXPORT_SYMBOL(write_dirty_buffer_with_hint); /* * For a data-integrity writeout, we need to wait upon any in-progress I/O diff --git a/include/linux/buffer_head.h b/include/linux/buffer_head.h index 7b73ef7..3d682ac 100644 --- a/include/linux/buffer_head.h +++ b/include/linux/buffer_head.h @@ -200,7 +200,10 @@ void ll_rw_block(int, int, int, struct buffer_head * bh[]); int sync_dirty_buffer(struct buffer_head *bh); int __sync_dirty_buffer(struct buffer_head *bh, int op_flags); void write_dirty_buffer(struct buffer_head *bh, int op_flags); +void write_dirty_buffer_with_hint(struct buffer_head *bh, int op_flags, + enum rw_hint hint); int submit_bh(int, int, struct buffer_head *); +int submit_bh_write_hint(int, int, struct buffer_head *, enum rw_hint hint); void write_boundary_block(struct block_device *bdev, sector_t bblock, unsigned blocksize); int bh_uptodate_or_lock(struct buffer_head *bh); -- 2.7.4