Change Details

Various disk controllers require their buffers to be aligned to 64 bytes. For buffers allocated in structures, ensure that they are 64-byte aligned. When using malloc to allocate memory, ensure that the returned memory is 64-byte aligned. If it is not 64-byte aligned, allocate an extra 64 bytes of memory so that the allocated structure can be 64-byte aligned within the allocation. This can be removed if/when the kernel is fixed. Because this problem has existed on one I/O subsystem or another since the 1990's, we are probably stuck with dealing with it forever. While we are here, we replace the dynamically allocated inode buffer with a buffer allocated in the uufsd structure just as the superblock and cylinder group buffers do.

Various disk controllers require their buffers to be aligned to a cache-line size (128 bytes). For buffers allocated in structures, ensure that they are 128-byte aligned. Use aligned_malloc to allocate memory to ensure that the returned memory is 128-byte aligned. This can be removed if/when the kernel is fixed. Because this problem has existed on one I/O subsystem or another since the 1990's, we are probably stuck with dealing with it forever. While we are here, we replace the dynamically allocated inode buffer with a buffer allocated in the uufsd structure just as the superblock and cylinder group buffers do.

Various disk controllers require their buffers to be aligned to 64a cache-line size (128 bytes). For buffers allocated in structures, ensure that they are 64-byte aligned. When using malloc to allocate memory, ensure that the returned memory is 64-byte aligned. If it is not 64ensure that they are 128-byte aligned,. allocate an extra 64 bytes ofUse aligned_malloc to allocate memory soto ensure that the allocated structure can be 64returned memory is 128-byte aligned within the allocation. This can be removed if/when the kernel is fixed. Because this problem has existed on one I/O subsystem or another since the 1990's, we are probably stuck with dealing with it forever. While we are here, we replace the dynamically allocated inode buffer with a buffer allocated in the uufsd structure just as the superblock and cylinder group buffers do.