Theodore Tso wrote: > On Thu, Jun 25, 2009 at 11:26:28PM +0200, Andreas Dilger wrote: >> IIRC there was also a good reason for this in the past, related to >> the buffers being submitted to the block device layer, and if they >> were allocated from the slab cache with CONFIG_DEBUG_SLAB or something >> similar enabled the buffer would be misaligned and cause grief. > > So what does SLAB/SLUB/SLOB do if we create a slab cache which is a > power of two? Can one of the allocators still return misaligned > blocks of memory in some circumstances? > > - Ted ecryptfs used to do kmalloc(PAGE_CACHE_SIZE) & virt_to_page on that, and with SLUB + slub debug, that gave back non-aligned memory, causing eventual corruption ... -Eric -- 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
