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-rw-r--r--fs/btrfs/inode.c6
1 files changed, 5 insertions, 1 deletions
diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index d535ed39c391..03771f09a9a2 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -7578,8 +7578,12 @@ static int btrfs_dio_iomap_begin(struct inode *inode, loff_t start,
const u64 data_alloc_len = length;
bool unlock_extents = false;
+ /*
+ * Cap the size of reads to that usually seen in buffered I/O as we need
+ * to allocate a contiguous array for the checksums.
+ */
if (!write)
- len = min_t(u64, len, fs_info->sectorsize);
+ len = min_t(u64, len, fs_info->sectorsize * BTRFS_MAX_BIO_SECTORS);
lockstart = start;
lockend = start + len - 1;