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erofs: allow large folios for compressed files

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As commit 2e6506e1c4 ("mm/migrate: fix deadlock in
migrate_pages_batch() on large folios") has landed upstream, large
folios can be safely enabled for compressed inodes since all
prerequisites have already landed in 6.11-rc1.

Stress tests has been running on my fleet for over 20 days without any
regression.  Additionally, users [1] have requested it for months.
Let's allow large folios for EROFS full cases upstream now for wider
testing.

[1] https://lore.kernel.org/r/CAGsJ_4wtE8OcpinuqVwG4jtdx6Qh5f+TON6wz+4HMCq=A2qFcA@mail.gmail.com

Cc: Barry Song <21cnbao@gmail.com>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
[ Gao Xiang: minor commit typo fixes. ]
Signed-off-by: Gao Xiang <hsiangkao@linux.alibaba.com>
Link: https://lore.kernel.org/r/20240819025207.3808649-1-hsiangkao@linux.alibaba.com
This commit is contained in:
Gao Xiang 2024-08-19 10:52:07 +08:00
parent 2c534624ae
commit e080a26725
2 changed files with 10 additions and 12 deletions
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2
Documentation/filesystems/erofs.rst
View File

@ -75,7 +75,7 @@ Here are the main features of EROFS:
- Support merging tail-end data into a special inode as fragments.
- Support large folios for uncompressed files.
- Support large folios to make use of THPs (Transparent Hugepages);
- Support direct I/O on uncompressed files to avoid double caching for loop
devices;

12
fs/erofs/inode.c
View File

@ -257,25 +257,23 @@ static int erofs_fill_inode(struct inode *inode)
goto out_unlock;
}
mapping_set_large_folios(inode->i_mapping);
if (erofs_inode_is_data_compressed(vi->datalayout)) {
#ifdef CONFIG_EROFS_FS_ZIP
DO_ONCE_LITE_IF(inode->i_blkbits != PAGE_SHIFT,
erofs_info, inode->i_sb,
"EXPERIMENTAL EROFS subpage compressed block support in use. Use at your own risk!");
inode->i_mapping->a_ops = &z_erofs_aops;
err = 0;
goto out_unlock;
#endif
#else
err = -EOPNOTSUPP;
goto out_unlock;
}
#endif
} else {
inode->i_mapping->a_ops = &erofs_raw_access_aops;
mapping_set_large_folios(inode->i_mapping);
#ifdef CONFIG_EROFS_FS_ONDEMAND
if (erofs_is_fscache_mode(inode->i_sb))
inode->i_mapping->a_ops = &erofs_fscache_access_aops;
#endif
}
out_unlock:
erofs_put_metabuf(&buf);
return err;