Linux Kernel Architecture

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semaphores, System V

semaphores, System V

data structures, 369–375

IPC permissions, 376

overview of, 367–369

system calls, 375

Sending Packets

network access layer, 768

network layer, 775

transport layer, 796–797

sending signals, 387–388

sequential file interface

connecting with VFS, 684

overview of, 680

writing sequential file handlers, 681–684

serial interfaces, 394

session layer, in OSI model, 736

sessions, process groups combined in, 54

setitimersystem call, 945

shared libraries, 83

shared mappings, 301

shared memory, System V, 380–381

shared mounts, 558

shared subtrees, VFS, 558–562

shrinkers, cache

data structures, 1092

registering/removing, 1092

shrinking caches with, 1093–1095

sibling processes, tree structures for

resource management, 443

signals

data structures for signal handling,

383–386

default actions for standard, 385

implementing signal handlers, 382–383

overview of, 381–389

processing signal queue, 388–389

sending, 387–388

system calls for implementing signal

handling, 386–387

system calls for managing signal handling,

827

simple file system, 680–689

simplification, C optimization techniques,

1185–1187

single indirect blocks, 590

slab allocator, 256–285

allocating objects, 276–279

alternative allocators to, 258–259

chicken-and-egg problem, 270

creating caches, 271–276

data structures for implementing, 266–270

destroying caches, 283

fineness of cache structure and, 261–262

fineness of slab structure and, 262–265

freeing objects, 280–282

general caches, 283–285

growing the cache, 279–280

implementing, 265

initializing, 270–271

memory management in kernel and,

259–261

overview of, 256–258

principle of, 261

slab cache

allocation of physical memory, 15

buffer head and, 976

creating, 271–276

destroying, 283

fineness of cache structure, 261–262

general caches, 283–285

growing, 279–280

processor cache and TLB control,

285–287

shrinking, 1092

slave mounts, 558

sleeping state, processes, 38–39

slob allocator

alternatives to slab allocator, 258

shrinking slob cache, 1092

slow path, TCP connections, 795

slub allocator

allocation of physical memory, 150

alternatives to slab allocator, 258

shrinking slub cache, 1092