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ext4: don't run ext4lazyinit for read-only filesystems
On a read-only filesystem, we won't invoke the block allocator, so we
don't need to prefetch the block bitmaps.
This avoids starting and running the ext4lazyinit thread at all on a
system with no read-write ext4 filesystems (for instance, a container VM
with read-only filesystems underneath an overlayfs).
Fixes: 21175ca434
("ext4: make prefetch_block_bitmaps default")
Signed-off-by: Josh Triplett <josh@joshtriplett.org>
Reviewed-by: Lukas Czerner <lczerner@redhat.com>
Link: https://lore.kernel.org/r/48b41da1498fcac3287e2e06b660680646c1c050.1659323972.git.josh@joshtriplett.org
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
This commit is contained in:
parent
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426d15ad11
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@ -3973,9 +3973,9 @@ int ext4_register_li_request(struct super_block *sb,
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goto out;
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}
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if (test_opt(sb, NO_PREFETCH_BLOCK_BITMAPS) &&
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(first_not_zeroed == ngroups || sb_rdonly(sb) ||
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!test_opt(sb, INIT_INODE_TABLE)))
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if (sb_rdonly(sb) ||
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(test_opt(sb, NO_PREFETCH_BLOCK_BITMAPS) &&
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(first_not_zeroed == ngroups || !test_opt(sb, INIT_INODE_TABLE))))
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goto out;
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elr = ext4_li_request_new(sb, first_not_zeroed);
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