From: Christian Brauner Date: Mon, 11 Nov 2024 09:00:29 +0000 (+0100) Subject: Merge patch series "proc/kcore: performance optimizations" X-Git-Tag: v6.14-rc1~217^2 X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=4972226d0dc48ddedf071355ca664fbf34b509c8;p=thirdparty%2Fkernel%2Flinux.git Merge patch series "proc/kcore: performance optimizations" Omar Sandoval says: The performance of /proc/kcore reads has been showing up as a bottleneck for drgn. drgn scripts often spend ~25% of their time in the kernel reading from /proc/kcore. A lot of this overhead comes from silly inefficiencies. This patch series fixes the low-hanging fruit. The fixes are all fairly small and straightforward. The result is a 25% improvement in read latency in micro-benchmarks (from ~235 nanoseconds to ~175) and a 15% improvement in execution time for real-world drgn scripts. Since I have a stake in /proc/kcore and have modified it several times, the final patch volunteers me to maintain it. * patches from https://lore.kernel.org/r/cover.1731115587.git.osandov@fb.com: MAINTAINERS: add me as /proc/kcore maintainer proc/kcore: use percpu_rw_semaphore for kclist_lock proc/kcore: don't walk list on every read proc/kcore: mark proc entry as permanent Link: https://lore.kernel.org/r/cover.1731115587.git.osandov@fb.com Signed-off-by: Christian Brauner --- 4972226d0dc48ddedf071355ca664fbf34b509c8