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From: Chenliang Li <[email protected]>
To: [email protected], [email protected]
Cc: [email protected], [email protected],
	[email protected], [email protected],
	[email protected], Chenliang Li <[email protected]>
Subject: [PATCH v3 2/5] io_uring/rsrc: store folio shift and mask into imu
Date: Mon, 13 May 2024 16:22:57 +0800	[thread overview]
Message-ID: <[email protected]> (raw)
In-Reply-To: <[email protected]>

Store the folio shift and folio mask into imu struct and use it in
iov_iter adjust, as we will have non PAGE_SIZE'd chunks if a
multi-hugepage buffer get coalesced.

Signed-off-by: Chenliang Li <[email protected]>
---
 io_uring/rsrc.c | 6 ++++--
 io_uring/rsrc.h | 2 ++
 2 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/io_uring/rsrc.c b/io_uring/rsrc.c
index d08224c0c5b0..578d382ca9bc 100644
--- a/io_uring/rsrc.c
+++ b/io_uring/rsrc.c
@@ -1015,6 +1015,8 @@ static int io_sqe_buffer_register(struct io_ring_ctx *ctx, struct iovec *iov,
 	imu->ubuf = (unsigned long) iov->iov_base;
 	imu->ubuf_end = imu->ubuf + iov->iov_len;
 	imu->nr_bvecs = nr_pages;
+	imu->folio_shift = PAGE_SHIFT;
+	imu->folio_mask = PAGE_MASK;
 	*pimu = imu;
 	ret = 0;
 
@@ -1153,12 +1155,12 @@ int io_import_fixed(int ddir, struct iov_iter *iter,
 
 			/* skip first vec */
 			offset -= bvec->bv_len;
-			seg_skip = 1 + (offset >> PAGE_SHIFT);
+			seg_skip = 1 + (offset >> imu->folio_shift);
 
 			iter->bvec = bvec + seg_skip;
 			iter->nr_segs -= seg_skip;
 			iter->count -= bvec->bv_len + offset;
-			iter->iov_offset = offset & ~PAGE_MASK;
+			iter->iov_offset = offset & ~imu->folio_mask;
 		}
 	}
 
diff --git a/io_uring/rsrc.h b/io_uring/rsrc.h
index b2a9d66b76dd..93da02e652bc 100644
--- a/io_uring/rsrc.h
+++ b/io_uring/rsrc.h
@@ -46,7 +46,9 @@ struct io_mapped_ubuf {
 	u64		ubuf;
 	u64		ubuf_end;
 	unsigned int	nr_bvecs;
+	unsigned int	folio_shift;
 	unsigned long	acct_pages;
+	unsigned long	folio_mask;
 	struct bio_vec	bvec[] __counted_by(nr_bvecs);
 };
 
-- 
2.34.1


  parent reply	other threads:[~2024-05-13  8:29 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <CGME20240513082306epcas5p2fd8ea6fd88b2c4ab1d17b1508fe2af97@epcas5p2.samsung.com>
2024-05-13  8:22 ` [PATCH v3 0/5] io_uring/rsrc: coalescing multi-hugepage registered buffers Chenliang Li
     [not found]   ` <CGME20240513082308epcas5p3c38ce4d44fa1613988bbae84eaec41b9@epcas5p3.samsung.com>
2024-05-13  8:22     ` [PATCH v3 1/5] io_uring/rsrc: add hugepage buffer coalesce helpers Chenliang Li
     [not found]   ` <CGME20240513082310epcas5p27576a80eae3ee09e40102b179ce46fa9@epcas5p2.samsung.com>
2024-05-13  8:22     ` Chenliang Li [this message]
     [not found]   ` <CGME20240513082311epcas5p3556d301a1f1faca0c6b613555324861e@epcas5p3.samsung.com>
2024-05-13  8:22     ` [PATCH v3 3/5] io_uring/rsrc: add init and account functions for coalesced imus Chenliang Li
     [not found]   ` <CGME20240513082313epcas5p2a781d3393e4bf92d13d04ac62bb28fb7@epcas5p2.samsung.com>
2024-05-13  8:22     ` [PATCH v3 4/5] io_uring/rsrc: enable multi-hugepage buffer coalescing Chenliang Li
2024-05-13 12:11       ` Anuj gupta
     [not found]   ` <CGME20240513082314epcas5p309fa70575596792b5c9923ce76a3778f@epcas5p3.samsung.com>
2024-05-13  8:23     ` [PATCH v3 5/5] liburing: add test cases for hugepage registered buffers Chenliang Li
2024-05-13 12:09   ` [PATCH v3 0/5] io_uring/rsrc: coalescing multi-hugepage " Anuj gupta
2024-05-13 13:40     ` Jens Axboe
     [not found]       ` <CGME20240514001813epcas5p455c8a3dd6f2164626a526c05f7fd92c4@epcas5p4.samsung.com>
2024-05-14  0:18         ` Chenliang Li
     [not found]     ` <CGME20240514001443epcas5p362c60c233ed2aecdb5e144099b44d9be@epcas5p3.samsung.com>
2024-05-14  0:14       ` [PATCH v3 4/5] io_uring/rsrc: enable multi-hugepage buffer coalescing Chenliang Li
     [not found]     ` <CGME20240514001620epcas5p10d8c08ffc3dbd746213df21e47df19f7@epcas5p1.samsung.com>
2024-05-14  0:16       ` [PATCH v3 0/5] io_uring/rsrc: coalescing multi-hugepage registered buffers Chenliang Li

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