ext4: teach ext4_meta_trans_blocks() about number of allocated extents

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So far ext4_meta_trans_blocks() expects that each extent counted in
@pextents will be allocated in the transaction we estimate credits for.
This is correct for the use in ext4_chunk_trans_blocks() and
ext4_chunk_trans_extent() however the use in atomic write path
(ext4_convert_unwritten_extents_atomic() and ext4_iomap_alloc() for
IOMAP_ATOMIC) unnecessarily overestimates the number of necessary
credits as neither of them allocates any data. Add argument to
ext4_meta_trans_blocks() for number of extents that are going to be
allocated in the transaction.

Signed-off-by: Jan Kara <jack@suse.cz>
Link: https://patch.msgid.link/20260805153605.166545-4-jack@suse.cz
Signed-off-by: Theodore Ts'o <tytso@mit.edu>

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Jan Kara 2026-08-05 17:35:47 +02:00 • committed by Theodore Ts'o

parent 8f3901fbb4

commit 25b2a7e8d4

3 changed files with 17 additions and 17 deletions

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2

fs/ext4/ext4.h

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2

fs/ext4/extents.c

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30

fs/ext4/inode.c

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