ext4: Add support for blocksize < pagesize in dioread_nolock

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This patch adds the support for blocksize < pagesize for
dioread_nolock feature.

Since in case of blocksize < pagesize, we can have multiple
small buffers of page as unwritten extents, we need to
maintain a vector of these unwritten extents which needs
the conversion after the IO is complete. Thus, we maintain
a list of tuple <offset, size> pair (io_end_vec) for this &
traverse this list to do the unwritten to written conversion.

Signed-off-by: Ritesh Harjani <riteshh@linux.ibm.com>
Link: https://lore.kernel.org/r/20191016073711.4141-5-riteshh@linux.ibm.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>

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This commit is contained in:

Ritesh Harjani 2019-10-16 13:07:10 +05:30 • committed by Theodore Ts'o

parent 2943fdbc68

commit c8cc88163f

4 changed files with 82 additions and 29 deletions

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11

fs/ext4/ext4.h

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11

fs/ext4/extents.c

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37

fs/ext4/inode.c

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52

fs/ext4/page-io.c

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