/* * linux/mm/msync.c * * Copyright (C) 1994-1999 Linus Torvalds */ /* * The msync() system call. */ #include #include #include #include #include #include /* * MS_SYNC syncs the entire file - including mappings. * * MS_ASYNC does not start I/O (it used to, up to 2.5.67). * Nor does it marks the relevant pages dirty (it used to up to 2.6.17). * Now it doesn't do anything, since dirty pages are properly tracked. * * The application may now run fsync() to * write out the dirty pages and wait on the writeout and check the result. * Or the application may run fadvise(FADV_DONTNEED) against the fd to start * async writeout immediately. * So by _not_ starting I/O in MS_ASYNC we provide complete flexibility to * applications. */ SYSCALL_DEFINE3(msync, unsigned long, start, size_t, len, int, flags) { unsigned long end; struct mm_struct *mm = current->mm; struct vm_area_struct *vma; int unmapped_error = 0; int error = -EINVAL; if (flags & ~(MS_ASYNC | MS_INVALIDATE | MS_SYNC)) goto out; if (offset_in_page(start)) goto out; if ((flags & MS_ASYNC) && (flags & MS_SYNC)) goto out; error = -ENOMEM; len = (len + ~PAGE_MASK) & PAGE_MASK; end = start + len; if (end < start) goto out; error = 0; if (end == start) goto out; /* * If the interval [start,end) covers some unmapped address ranges, * just ignore them, but return -ENOMEM at the end. */ down_read(&mm->mmap_sem); vma = find_vma(mm, start); for (;;) { struct file *file; loff_t fstart, fend; /* Still start < end. */ error = -ENOMEM; if (!vma) goto out_unlock; /* Here start < vma->vm_end. */ if (start < vma->vm_start) { start = vma->vm_start; if (start >= end) goto out_unlock; unmapped_error = -ENOMEM; } /* Here vma->vm_start <= start < vma->vm_end. */ if ((flags & MS_INVALIDATE) && (vma->vm_flags & VM_LOCKED)) { error = -EBUSY; goto out_unlock; } file = vma->vm_file; fstart = (start - vma->vm_start) + ((loff_t)vma->vm_pgoff << PAGE_SHIFT); fend = fstart + (min(end, vma->vm_end) - start) - 1; start = vma->vm_end; if ((flags & MS_SYNC) && file && (vma->vm_flags & VM_SHARED)) { get_file(file); up_read(&mm->mmap_sem); error = vfs_fsync_range(file, fstart, fend, 1); fput(file); if (error || start >= end) goto out; down_read(&mm->mmap_sem); vma = find_vma(mm, start); } else { if (start >= end) { error = 0; goto out_unlock; } vma = vma->vm_next; } } out_unlock: up_read(&mm->mmap_sem); out: return error ? : unmapped_error; } value='range'>range

path: root/tools/perf/util

Mode	Name	Size
-rw-r--r--	Build	5870	log plain
-rwxr-xr-x	PERF-VERSION-GEN	1010	log plain
-rw-r--r--	alias.c	1471	log plain
-rw-r--r--	annotate.c	44411	log plain
-rw-r--r--	annotate.h	5583	log plain
-rw-r--r--	auxtrace.c	47774	log plain
-rw-r--r--	auxtrace.h	22142	log plain
-rw-r--r--	block-range.c	6948	log plain
-rw-r--r--	block-range.h	1607	log plain
-rw-r--r--	bpf-loader.c	40787	log plain
-rw-r--r--	bpf-loader.h	6215	log plain
-rw-r--r--	bpf-prologue.c	11226	log plain
-rw-r--r--	bpf-prologue.h	847	log plain
-rw-r--r--	build-id.c	19054	log plain
-rw-r--r--	build-id.h	1859	log plain
d---------	c++	184	log plain
-rw-r--r--	cache.h	733	log plain
-rw-r--r--	call-path.c	2893	log plain
-rw-r--r--	call-path.h	2203	log plain
-rw-r--r--	callchain.c	29332	log plain
-rw-r--r--	callchain.h	7881	log plain
-rw-r--r--	cgroup.c	3195	log plain
-rw-r--r--	cgroup.h	359	log plain
-rw-r--r--	cloexec.c	1950	log plain
-rw-r--r--	cloexec.h	251	log plain
-rw-r--r--	color.c	4787	log plain
-rw-r--r--	color.h	1647	log plain
-rw-r--r--	comm.c	2239	log plain
-rw-r--r--	comm.h	561	log plain
-rw-r--r--	config.c	16262	log plain
-rw-r--r--	config.h	2113	log plain
-rw-r--r--	counts.c	1026	log plain
-rw-r--r--	counts.h	790	log plain
-rw-r--r--	cpumap.c	12627	log plain
-rw-r--r--	cpumap.h	1954	log plain
-rw-r--r--	cs-etm.h	2061	log plain
-rw-r--r--	ctype.c	2018	log plain
-rw-r--r--	data-convert-bt.c	36671	log plain
-rw-r--r--	data-convert-bt.h	302	log plain
-rw-r--r--	data-convert.h	141	log plain
-rw-r--r--	data.c	3459	log plain
-rw-r--r--	data.h	1369	log plain
-rw-r--r--	db-export.c	11434	log plain
-rw-r--r--	db-export.h	3816	log plain
-rw-r--r--	debug.c	4417	log plain
-rw-r--r--	debug.h	2023	log plain
-rw-r--r--	demangle-java.c	4219	log plain
-rw-r--r--	demangle-java.h	249	log plain
-rw-r--r--	demangle-rust.c	6602	log plain
-rw-r--r--	demangle-rust.h	170	log plain
-rw-r--r--	drv_configs.c	1834	log plain
-rw-r--r--	drv_configs.h	844	log plain
-rw-r--r--	dso.c	31994	log plain
-rw-r--r--	dso.h	10399	log plain
-rw-r--r--	dwarf-aux.c	33828	log plain
-rw-r--r--	dwarf-aux.h	5101	log plain
-rw-r--r--	dwarf-regs.c	1816	log plain
-rw-r--r--	env.c	1884	log plain
-rw-r--r--	env.h	1268	log plain
-rw-r--r--	event.c	36670	log plain
-rw-r--r--	event.h	15997	log plain
-rw-r--r--	evlist.c	47104	log plain
-rw-r--r--	evlist.h	12584	log plain
-rw-r--r--	evsel.c	63917	log plain
-rw-r--r--	evsel.h	13041	log plain
-rw-r--r--	evsel_fprintf.c	5831	log plain
-rw-r--r--	find-vdso-map.c	581	log plain
-rw-r--r--	genelf.c	11653	log plain
-rw-r--r--	genelf.h	1814	log plain
-rw-r--r--	genelf_debug.c	14374	log plain
-rwxr-xr-x	generate-cmdlist.sh	1141	log plain
-rw-r--r--	group.h	122	log plain
-rw-r--r--	header.c	73410	log plain
-rw-r--r--	header.h	4365	log plain
-rw-r--r--	help-unknown-cmd.c	3221	log plain