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| author | Zhang Yi <yi.zhang@huawei.com> | 2025-07-07 22:08:14 +0800 |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2025-07-14 23:48:15 -0400 |
| commit | b12f423d598fd874df9ecfb2436789d582fda8e6 (patch) | |
| tree | bec5abed31fbf42398700ecc878d2fafd6896e4d /rust/helpers/err.c | |
| parent | 5137d6c8906b55b3c7b5d1aa5a549753ec8520f5 (diff) | |
ext4: limit the maximum folio order
In environments with a page size of 64KB, the maximum size of a folio
can reach up to 128MB. Consequently, during the write-back of folios,
the 'rsv_blocks' will be overestimated to 1,577, which can make
pressure on the journal space where the journal is small. This can
easily exceed the limit of a single transaction. Besides, an excessively
large folio is meaningless and will instead increase the overhead of
traversing the bhs within the folio. Therefore, limit the maximum order
of a folio to 2048 filesystem blocks.
Reported-by: Naresh Kamboju <naresh.kamboju@linaro.org>
Reported-by: Joseph Qi <jiangqi903@gmail.com>
Closes: https://lore.kernel.org/linux-ext4/CA+G9fYsyYQ3ZL4xaSg1-Tt5Evto7Zd+hgNWZEa9cQLbahA1+xg@mail.gmail.com/
Signed-off-by: Zhang Yi <yi.zhang@huawei.com>
Tested-by: Joseph Qi <joseph.qi@linux.alibaba.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Link: https://patch.msgid.link/20250707140814.542883-12-yi.zhang@huaweicloud.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Diffstat (limited to 'rust/helpers/err.c')
0 files changed, 0 insertions, 0 deletions