81bca6ddae
1. Clustered I/O is switched by the MNT_NOCLUSTERR and MNT_NOCLUSTERW bits of the mnt_flag. The sysctl variables, vfs.foo.doclusterread and vfs.foo.doclusterwrite are deleted. Only mount option can control clustered I/O from userland. 2. When foofs_mount mounts block device, foofs_mount checks D_CLUSTERR and D_CLUSTERW bits of the d_flags member in the block device switch table. If D_NOCLUSTERR / D_NOCLUSTERW are set, MNT_NOCLUSTERR / MNT_NOCLUSTERW bits will be set. In this case, MNT_NOCLUSTERR and MNT_NOCLUSTERW cannot be cleared from userland. 3. Vnode driver disables both clustered read and write. 4. Union filesystem disables clutered write. Reviewed by: bde |
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COPYRIGHT.INFO | ||
ext2_alloc.c | ||
ext2_balloc.c | ||
ext2_bmap.c | ||
ext2_extern.h | ||
ext2_fs_i.h | ||
ext2_fs_sb.h | ||
ext2_fs.h | ||
ext2_ihash.c | ||
ext2_inode_cnv.c | ||
ext2_inode.c | ||
ext2_linux_balloc.c | ||
ext2_linux_ialloc.c | ||
ext2_lookup.c | ||
ext2_mount.h | ||
ext2_readwrite.c | ||
ext2_subr.c | ||
ext2_vfsops.c | ||
ext2_vnops.c | ||
fs.h | ||
i386-bitops.h | ||
inode.h |