diff options
Diffstat (limited to 'man2/mremap.2')
| -rw-r--r-- | man2/mremap.2 | 38 |
1 files changed, 19 insertions, 19 deletions
diff --git a/man2/mremap.2 b/man2/mremap.2 index e4dd9d0ce..62487f9ae 100644 --- a/man2/mremap.2 +++ b/man2/mremap.2 @@ -44,7 +44,7 @@ below. .P If the value of \fIold_size\fP is zero, and \fIold_address\fP refers to a shareable mapping (see -.BR mmap (2) +.MR mmap 2 .BR MAP_SHARED ), then .BR mremap () @@ -76,7 +76,7 @@ the mapping should be employed). This flag serves a similar purpose to the .B MAP_FIXED flag of -.BR mmap (2). +.MR mmap 2 . If this flag is specified, then .BR mremap () accepts a fifth argument, @@ -110,7 +110,7 @@ flag can be used only with private anonymous mappings and .B MAP_ANONYMOUS in -.BR mmap (2)). +.MR mmap 2 ). .IP After completion, any access to the range specified by @@ -119,10 +119,10 @@ and .I old_size will result in a page fault. The page fault will be handled by a -.BR userfaultfd (2) +.MR userfaultfd 2 handler if the address is in a range previously registered with -.BR userfaultfd (2). +.MR userfaultfd 2 . Otherwise, the kernel allocates a zero-filled page to handle the fault. .IP The @@ -137,7 +137,7 @@ If the memory segment specified by and .I old_size is locked (using -.BR mlock (2) +.MR mlock 2 or similar), then this lock is maintained when the segment is resized and/or relocated. As a consequence, the amount of memory locked by the process may change. @@ -261,7 +261,7 @@ argument. changes the mapping between virtual addresses and memory pages. This can be used to implement a very efficient -.BR realloc (3). +.MR realloc 3 . .P In Linux, memory is divided into pages. A process has (one or) @@ -280,7 +280,7 @@ segments will also cause a segmentation violation. If .BR mremap () is used to move or expand an area locked with -.BR mlock (2) +.MR mlock 2 or equivalent, the .BR mremap () call will make a best effort to populate the new area but will not fail @@ -294,18 +294,18 @@ Possible applications for include: .IP \[bu] 3 Non-cooperative -.BR userfaultfd (2): +.MR userfaultfd 2 : an application can yank out a virtual address range using .B MREMAP_DONTUNMAP and then employ a -.BR userfaultfd (2) +.MR userfaultfd 2 handler to handle the page faults that subsequently occur as other threads in the process touch pages in the yanked range. .IP \[bu] Garbage collection: .B MREMAP_DONTUNMAP can be used in conjunction with -.BR userfaultfd (2) +.MR userfaultfd 2 to implement garbage collection algorithms (e.g., in a Java virtual machine). Such an implementation can be cheaper (and simpler) than conventional garbage collection techniques that involve @@ -336,14 +336,14 @@ fails with the error .B EINVAL in this scenario. .SH SEE ALSO -.BR brk (2), -.BR getpagesize (2), -.BR getrlimit (2), -.BR mlock (2), -.BR mmap (2), -.BR sbrk (2), -.BR malloc (3), -.BR realloc (3) +.MR brk 2 , +.MR getpagesize 2 , +.MR getrlimit 2 , +.MR mlock 2 , +.MR mmap 2 , +.MR sbrk 2 , +.MR malloc 3 , +.MR realloc 3 .P Your favorite text book on operating systems for more information on paged memory |