Cloud Kernel Release 14

Today we announce a new release of Cloud Kernel, ck-release-14, is out. The major feature in this release is the support of psi (pressure stall information).

Highlights

• Bump to kernel 4.19.48;
• Backport PSI.

Enhancement

• sched: disable auto group by default (Shanpei Chen)

Bug fixes

• SUNRPC: Clean up initialisation of the struct rpc_rqst (Trond Myklebust)
• xfs: serialize unaligned dio writes against all other dio writes (Brian Foster)

Cloud Kernel Release 13.2

Cloud Kernel Release 13.2 is a maintenance release, which fixes the well-known TCP SACK PANIC bugs.

Cloud Kernel Release 13

After three weeks' developing and testing work, we finally announce the release of Cloud Kernel Release 13 today. As usual, this release is built based on another upstream LTS release, v4.19.43.

Highlights

• Bump to kernel v4.19.43, with x86/speculation/mds fixes included;
• Support tunable tcp timeout value in TIME-WAIT state (/proc/sys/net/ipv4/tcp_tw_timeout);

Bug Fixes

• splice: don't read more than available pipe space (Darrick J. Wong)
• xfs: don't overflow xattr listent buffer (Darrick J. Wong)
• ovl: relax WARN_ON() for overlapping layers use case (Amir Goldstein)
• block: Fix a NULL pointer dereference in generic_make_request() (Guilherme G. Piccoli)
• ext4: fix data corruption caused by overlapping unaligned and aligned IO (Lukas Czerner)
• PCI: Fix "try" semantics of bus and slot reset (Alex Williamson)
• net/hookers: fix link error with ipv6 disabled (Caspar Zhang)
• NFSv4.1 fix incorrect return value in copy_file_range (Olga Kornievskaia)
• NFSv4.2 fix unnecessary retry in nfs4_copy_file_range (Olga Kornievskaia)
• writeback: memcg_blkcg_tree_lock can be static (kbuild test robot)
• net: fix array_size.cocci warnings (kbuild test robot)
• net/hookers: only enable on x86 platform (Caspar Zhang)
• ext4: zero out the unused memory region in the extent tree block (Sriram Rajagopalan)
• fs/writeback: wrap cgroup writeback v1 logic (Joseph Qi)
• NFSv4: remove unused variable flags in nfs4_retry_setlk() (Joseph Qi)

Cloud Kernel Release 12

Cloud Kernel Release 12 is out! This release is built based on upstream LTS v4.19.36. New functions, enhancements and bug fixes in current release are as follows:

Functions

• Implemented cgroup writeback v1 interface, please refer to wiki for user documentation (Jiufei Xue）

Bug Fixes

• NFSv4.1: Fix bug only first CB_NOTIFY_LOCK is handled (Yihao Wu)
• NFSv4.1: Again fix a race where CB_NOTIFY_LOCK fails to wake a waiter (Yihao Wu)
• ovl: check the capability before cred overridden (Jiufei Xue)
• vfio/type1: Limit DMA mappings per container (Alex Williamson)
• fbdev: fix WARNING in __alloc_pages_nodemask bug (Jiufei Xue)