Hello, Browsing the patch submitted for 2.4 inclusion, I noticed that LVM2 modifies the buffer_head struct. Why does LVM2 require the addition of it's own private field in the buffer_head? It seems that it should be able to use the existing b_private field. How does that extra field affect performance relative to the cache? Won't any negative effects be seen by everything that uses buffer_heads? Also, as I understand the slab code and hardware cache alignment, won't the addition of the new field cause the each buffer_head to consume 128 bytes instead of 96? Just curious to know why this field was added, when the buffer_head already had a field for this purpose. -Tom _________________________________________________________________ Chat with friends online, try MSN Messenger: http://messenger.msn.com _______________________________________________ linux-lvm mailing list linux-lvm@sistina.com http://lists.sistina.com/mailman/listinfo/linux-lvm read the LVM HOW-TO at http://www.sistina.com/lvm/Pages/howto.html
