Over the past few weeks, some users have reported experimenting with the v3 07 kernel.
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Overview: This version of Linux includes support for 64-bit ARM architecture, support for ARM to insert others into systems using the exact kernel, signed kernel modules, Btrfs hold to disable copy-on-write for almost any file database. . Use of chattr and especially fast fsync(), new “perf trace” tool, attributes after strace, support for TCP Fast Open on the host side, experimental support for the SMBv2 protocol established by NFS 4.1, and help and support for NFS, a new tunneling protocol. which allows Layer 2 Ethernet packets to be transmitted over UDP and supports the Intel Supervisory Mode Access Prevention (SMAP) monitoring feature. Many small features as well as new drivers and fixes remain available as well.
1.1. ARM Support For Multiple Platforms
Most Linux distributions for x86 PCs can boot and run hundreds of different PCs (different processor manufacturers, different GPU models, different motherboards and chipsets, etc.) using a single hardware support facility. This opportunity isLoading various types of hardware is considered new to the PC world. However, it didn’t exist in the ARM world for Linux. ARM ecosystem features have always been domain-specific and embedded where hardware enumeration is in many cases impossible, so each individual ARM kernel image was targeted at a specific embedded hardware target. It could not run in other ARM elements.
This release of Linux adds “cross-platform” ARM implementation guidance, the ability to create a custom ARM kernel image that can boot multiple hardware. This will make things much easier for distributors who can support ARM platforms.
1.2. 64-bit Left Hand Support
The latest ARM processor, ARM v8, brings 64-bit memory addressing capabilities to the ARM world for the first time. New 64-bit processors must run 32-bit code, always 64-bit instruction set is brand new, not just 64-bit extensions to all 32-bit instruction sets, so Linux support is considered final, implemented brand newth architecture.
1.3. Cryptographically Signed Kernel Modules
Additional symbol engine modules are supported in this release. The kernel can also completely disable the loading of programs that have not been signed with the correct key – also for root users. This feature is useful for security reasons, since any attacker with root access is unlikely to be able to install a real rootkit using module loading exercises.
Recommended LWN article: Loading the kernel code for signed parts: (commit 1, 2, 3)
1.4. Btrfs Updates
Speed up fsync(): The fsync() system call writes modified data associated with a file to disk. The performance of fsync() is very important for programs like dpkg/rpm, Firefox, etc. The performance of fsync() Btrf has always been quite poor, but in this case, fsync can be several times faster. Code: (commit 1, 2)
Removed certain restrictions on hard links in a specific directory: Btrfs did not allow more than 20 hard links to be served in a single directory. Added disk change for resworking on a sort of new “inode link” that takes the hat off hardlinks in a directory to help you hit 65kb (commit)
- < p>Hole Punch: Hole Punch is certainly the ability to free up space in the product line data (using the fallocate() system call with the FALLOC_FL_PUNCH_HOLE mode). Btrfs now supports this donation. Code: (commit)
chattr for each file NOCOW Help: Btrfs can disable copy-on-write for computer file data using the “nodatacow” option. This release also added support for disabling copy when writing file data in the root directory of each file using “chattr + C-file” (requires latest and perfect e2fsprogs). Copy-on-write is not suitable for all workloads, and many applications want to disable it for better fragmentation and performance. Note: To avoid someone having to use copy-on-write to use chattr on a specific empty file, this won’t work if it’s a file that already has knowledge in it (in which case you can create Temporary file, turn off COW , print data and rename the most important file). Note 2: Disabling copy-on-write also disables the auxiliary checksum for this operation. Note 3: You can use chattr +C on a large directory, and new files after the command is created will get COW support for devices. Code: (confirm)
1.5. perf trace, an alternative to strace
A new performance monitoring tool has been added to the performance profiling environment. This machine should look like the venerable new “strace”, but the tool uses the new Linux tracing infrastructure instead of generating the ptrace() system call. Its purpose is generally to make tracking easier for a wider audience of Linux users.
pert small shows events related to the target, originally system calls, just other system events like page faults, approach lifecycle events, scheduling events, etc. This tool is still in early release, so this direct mode. Oneessential tool and many details to be improved to complete, but finally it works like other perf tools in addition to perf.data files and allows separate “registration”. “for analysis steps.
1.6. TCP Fast Open (Server Side)
Linux has already added support for Fast TCP Open for version 3.6 users. This release adds Fast Open support for the Edge Server, complementing Fast Open TCP support on Linux.
Fast Open is an optimization of the TCP connection setup process that excludes the return path from some types of TCP conversations. Fast Open has shown a 4% to 41% speed improvement in page browsing time on popular websites.
1.7. Experimental Support For The SMB 2 Protocol Alt=”/!”
Note : Changelog 3 Mentioned old Kernel Deployment 6 SMBv2 support, but one of them was a bug. In fact, SMBv2 support was not available in Linux 3.6, but it was merged to do so before being dropped before the final release. Finally it is available in this version.Speed up your computer today by downloading the software that will fix your PC errors.
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