In a copy on write system, reading does not increase memory, while writing data brings in new pages. And OS also has zero pages, mmap memory addresses would have 0 provided by zero page, and reading 0 from them does not increase memory until we write. But overwriting 0 on those mmap-ed addresses increases memory. Is it possible to still keep copy-on-write and use zero pages after overwriting 0?
Related Questions in LINUX
- Is there some way to use printf to print a horizontal list of decrementing hex digits in NASM assembly on Linux
- Why does Hugo generate different taxonomy-related HTML on different OS's?
- Writes in io_uring do not advance the file offset
- Why `set -o pipefail` gives different output even though the pipe is not failing
- what really controls the permissions: UID or eUID?
- Compiling eBPF program in Docker fails due to missing '__u64' type
- Docker container unable to make HTTPS requests to external API
- Whow to use callback_query_handler in Python 3.10
- Create kea runtime directory at startup in Yocto image
- Problem on CPU scheduling algorithms in OS
- How to copy files into the singularity sandbox?
- Android kernel error: undefined reference to `get_hw_version_platform'
- Is there a need for BPF Linux namespace?
- Error when trying to execute a binary compiled in a Kali Linux machine on an Ubuntu system
- Issue with launching application after updating ElectronJs to version 28.0.0 on Windows and Linux
Related Questions in LINUX-KERNEL
- Android kernel error: undefined reference to `get_hw_version_platform'
- Is there a need for BPF Linux namespace?
- Facing fatal errors while running "yum update" command on CentOS 7/Cloudlinux 7
- crash utility itself crashes while decoding kdump generated from null pointer dereference in kernel module
- How to compile the Linux kernel with -O0 for more detailed debug?
- Linux support for parallel Pixel data Image sensor
- Can't upgrade to newest version of linux-image-6.5.0-26-generic
- How to protect a page so that it cannot be write in mips arch?
- How to extract the .img file into normal kernel source file in the linux?
- Storage size of struct hash_desc desc; isn't known
- How can I intercept failed file openning calls?
- struct nameidata-Linux Kernel Module
- How to modify a 'struct msghdr' in Linux Kernel Module?
- How to allocate 500MB+ physically contiguous memory in a Linux kernel module and copy data to that memory from a userspace process?
- Hyper Threading: nosmt in grub configuration
Related Questions in MMAP
- How to use mmap iteratively to map data in small chunks from a large file
- how linux do page reclaim of anonymous mmap region?
- Is it possible to map the same physical memory to multiple virtual address spaces within the same process?
- Sprintf() messing up and not doing what I want it to do
- How to get one character at a time
- mmap:Operation not supported
- Python mmap return Invalid argument
- Unfamiliar notation in manpage mmap(2): void addr[.length]
- Fastest approach to split and access mmaped data for each thread
- How to execute process with mmap-ed memory as stdin and another mmap-ed memory as stdout?
- Is it possible to limit mmap memory usage?
- how can you dump [vvar] segment
- A bus error that occurs when mmap memory is used with memcpy
- how to safely write mmap'd region to file
- Could not read operational registers value through 4-port usb3.0 host controller
Related Questions in COPY-ON-WRITE
- COW(copt on write) in Swift, Why does cow only work on the collection type?
- xv6 lab copy-on-write lab: test copyinstr2 failed
- Change column in-place with copy-on-write
- Can a QString be shared between two Qt containers without being deep-copied?
- Why does copy_to_user fail after process forked?
- How can we prove that copy on write is applied to strings of more than 15 characters in Swift?
- File copy-on-write in Java?
- Can I change the encoding of a frozen String without copying it?
- Copy-on-write for large data in Python's ProcessPoolExecutor
- Is a call to free() in the forked process causing a copy-on-write?
- Mutating a Julia dictionary through aliases
- linux process injection, what happen to the shared object file and why the whole memory mapping of the process after the injection changed?
- PHP Copy on Write in Arrays vs Objects
- What is a "container detachement" in the C++11 ranged based loop over QList? Is it a performance only problem?
- Which os support copy-on-write?
Popular Questions
- How do I undo the most recent local commits in Git?
- How can I remove a specific item from an array in JavaScript?
- How do I delete a Git branch locally and remotely?
- Find all files containing a specific text (string) on Linux?
- How do I revert a Git repository to a previous commit?
- How do I create an HTML button that acts like a link?
- How do I check out a remote Git branch?
- How do I force "git pull" to overwrite local files?
- How do I list all files of a directory?
- How to check whether a string contains a substring in JavaScript?
- How do I redirect to another webpage?
- How can I iterate over rows in a Pandas DataFrame?
- How do I convert a String to an int in Java?
- Does Python have a string 'contains' substring method?
- How do I check if a string contains a specific word?
Trending Questions
- UIImageView Frame Doesn't Reflect Constraints
- Is it possible to use adb commands to click on a view by finding its ID?
- How to create a new web character symbol recognizable by html/javascript?
- Why isn't my CSS3 animation smooth in Google Chrome (but very smooth on other browsers)?
- Heap Gives Page Fault
- Connect ffmpeg to Visual Studio 2008
- Both Object- and ValueAnimator jumps when Duration is set above API LvL 24
- How to avoid default initialization of objects in std::vector?
- second argument of the command line arguments in a format other than char** argv or char* argv[]
- How to improve efficiency of algorithm which generates next lexicographic permutation?
- Navigating to the another actvity app getting crash in android
- How to read the particular message format in android and store in sqlite database?
- Resetting inventory status after order is cancelled
- Efficiently compute powers of X in SSE/AVX
- Insert into an external database using ajax and php : POST 500 (Internal Server Error)