On Jun 23, 2009 17:25 +0900, Akira Fujita wrote: > alloc_flag of ext4_alloc_rule structure is set as "mandatory" or "advisory". > Restricted blocks with "mandatory" are never used by block allocator. > But in "advisory" case, block allocator is allowed to use restricted blocks > when there are no free blocks on FS. Would it make more sense to implement the range protections via the existing preallocation ranges (PA)? An inode can have multiple PAs attached to it to have it prefer allocations from that range. We could also attach PAs to the superblock to prevent other files from allocating out of those ranges. This would work better with the existing allocation code instead of creating a second similar mechanism. Cheers, Andreas -- Andreas Dilger Sr. Staff Engineer, Lustre Group Sun Microsystems of Canada, Inc. -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
