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Suren Baghdasaryan 05c82ee363 alloc_tag: skip pgalloc_tag_swap if profiling is disabled 
When memory allocation profiling is disabled, there is no need to swap
allocation tags during migration.  Skip it to avoid unnecessary overhead.

Once I added these checks, the overhead of the mode when memory profiling
is enabled but turned off went down by about 50%.

Link: https://lkml.kernel.org/r/20241226211639.1357704-2-surenb@google.com
Fixes: e0a955bf7f ("mm/codetag: add pgalloc_tag_copy()")
Signed-off-by: Suren Baghdasaryan <surenb@google.com>
Cc: David Wang <00107082@163.com>
Cc: Kent Overstreet <kent.overstreet@linux.dev>
Cc: Yu Zhao <yuzhao@google.com>
Cc: Zhenhua Huang <quic_zhenhuah@quicinc.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2025-01-15 21:15:43 -08:00
arch x86/execmem: fix ROX cache usage in Xen PV guests 2025-01-12 19:03:35 -08:00
block
certs
crypto
Documentation 25 hotfixes. 16 are cc:stable. 18 are MM and 7 are non-MM. 2025-01-05 10:37:45 -08:00
drivers zram: fix potential UAF of zram table 2025-01-12 19:03:37 -08:00
fs fs/proc: fix softlockup in __read_vmcore (part 2) 2025-01-12 19:03:38 -08:00
include mm: clear uffd-wp PTE/PMD state on mremap() 2025-01-12 19:03:37 -08:00
init
io_uring
ipc
kernel 25 hotfixes. 16 are cc:stable. 18 are MM and 7 are non-MM. 2025-01-05 10:37:45 -08:00
lib alloc_tag: skip pgalloc_tag_swap if profiling is disabled 2025-01-15 21:15:43 -08:00
LICENSES
mm mm: page_alloc: fix missed updates of lowmem_reserve in adjust_managed_page_count 2025-01-15 21:15:42 -08:00
net
rust
samples
scripts scripts/decode_stacktrace.sh: fix decoding of lines with an additional info 2025-01-12 19:03:34 -08:00
security
sound
tools selftests/mm: set allocated memory to non-zero content in cow test 2025-01-12 19:03:37 -08:00
usr
virt
.clang-format
.clippy.toml
.cocciconfig
.editorconfig
.get_maintainer.ignore
.gitattributes
.gitignore
.mailmap
.rustfmt.toml
COPYING
CREDITS
Kbuild
Kconfig
MAINTAINERS 25 hotfixes. 16 are cc:stable. 18 are MM and 7 are non-MM. 2025-01-05 10:37:45 -08:00
Makefile Linux 6.13-rc6 2025-01-05 14:13:40 -08:00
README

README 

Linux kernel
============

There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.  The formatted documentation can also be read online at:

    https://www.kernel.org/doc/html/latest/

There are various text files in the Documentation/ subdirectory,
several of them using the reStructuredText markup notation.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.