ext4: Fix hueristic which avoids group preallocation for closed files
The hueristic was designed to avoid using locality group preallocation when writing the last segment of a closed file. Fix it by move setting size to the maximum of size and isize until after we check whether size == isize. Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
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@ -4189,7 +4189,6 @@ static void ext4_mb_group_or_file(struct ext4_allocation_context *ac)
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size = ac->ac_o_ex.fe_logical + ac->ac_o_ex.fe_len;
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size = ac->ac_o_ex.fe_logical + ac->ac_o_ex.fe_len;
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isize = (i_size_read(ac->ac_inode) + ac->ac_sb->s_blocksize - 1)
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isize = (i_size_read(ac->ac_inode) + ac->ac_sb->s_blocksize - 1)
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>> bsbits;
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>> bsbits;
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size = max(size, isize);
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if ((size == isize) &&
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if ((size == isize) &&
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!ext4_fs_is_busy(sbi) &&
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!ext4_fs_is_busy(sbi) &&
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@ -4199,6 +4198,7 @@ static void ext4_mb_group_or_file(struct ext4_allocation_context *ac)
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}
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}
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/* don't use group allocation for large files */
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/* don't use group allocation for large files */
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size = max(size, isize);
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if (size >= sbi->s_mb_stream_request) {
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if (size >= sbi->s_mb_stream_request) {
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ac->ac_flags |= EXT4_MB_STREAM_ALLOC;
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ac->ac_flags |= EXT4_MB_STREAM_ALLOC;
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return;
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return;
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