[PATCH] perf/core: Avoid context switch overheads

From: "leilei.lin" A performance issue caused by less strickly check in task sched when these tasks were once attached by per-task perf_event. A task will alloc task->perf_event_ctxp[ctxn] when it was called by perf_event_open, and task->perf_event_ctxp[ctxn] would

[PATCH v3] perf/core: Avoid context switch overheads

From: "leilei.lin" A performance issue caused by less strickly check in task sched when these tasks were once attached by per-task perf_event. A task will alloc task->perf_event_ctxp[ctxn] when it was called by perf_event_open, and task->perf_event_ctxp[ctxn] would

[PATCH v2] perf/core: Avoid context switch overheads

From: "leilei.lin" A performance issue caused by less strickly check in task sched when these tasks were once attached by per-task perf_event. A task will alloc task->perf_event_ctxp[ctxn] when it was called by perf_event_open, and task->perf_event_ctxp[ctxn] would

[PATCH v2] perf/core: Avoid context switch overheads

From: "leilei.lin" A performance issue caused by less strickly check in task sched when these tasks were once attached by per-task perf_event. A task will alloc task->perf_event_ctxp[ctxn] when it was called by perf_event_open, and task->perf_event_ctxp[ctxn] would

[PATCH 1/2] fs/dcache.c: New copy_dname method

From: "leilei.lin" locklessly and integrally copy dentry name. It will be used later for bugfix Signed-off-by: leilei.lin --- fs/dcache.c| 38 ++ include/linux/dcache.h | 2 ++ 2 files

[PATCH 0/2] fsnotify: fix mem overwritten

From: "leilei.lin" Slub alloced mem overwritten ocurrs when fsnotify thread was copying the dentry name and another rename thread change the dentry name at same time. These patches do the following: 1. A new copy_dname method was created which copy file_name to new

[PATCH 2/2] fsnotify: use method copy_dname copying filename

From: "leilei.lin" Kernel got panicked in inotify_handle_event, while running the rename operation against the same file. The root cause is that the race between fsnotify thread and file rename thread. When fsnotify thread was copying the dentry name, another rename

[PATCH] perf/core: Avoid context switch overheads

From: "leilei.lin" A performance issue caused by less strickly check in task sched when these tasks were once attached by per-task perf_event. A task will alloc task->perf_event_ctxp[ctxn] when it was called by perf_event_open, and task->perf_event_ctxp[ctxn] would not ever be freed to NULL.

[PATCH v2] perf/core: Avoid context switch overheads

From: "leilei.lin" A performance issue caused by less strickly check in task sched when these tasks were once attached by per-task perf_event. A task will alloc task->perf_event_ctxp[ctxn] when it was called by perf_event_open, and task->perf_event_ctxp[ctxn] would not ever be freed to NULL.

[PATCH v2] perf/core: Avoid context switch overheads

From: "leilei.lin" A performance issue caused by less strickly check in task sched when these tasks were once attached by per-task perf_event. A task will alloc task->perf_event_ctxp[ctxn] when it was called by perf_event_open, and task->perf_event_ctxp[ctxn] would not ever be freed to NULL.

[PATCH v3] perf/core: Avoid context switch overheads

From: "leilei.lin" A performance issue caused by less strickly check in task sched when these tasks were once attached by per-task perf_event. A task will alloc task->perf_event_ctxp[ctxn] when it was called by perf_event_open, and task->perf_event_ctxp[ctxn] would not ever be freed to NULL.

[PATCH 1/2] fs/dcache.c: New copy_dname method

From: "leilei.lin" locklessly and integrally copy dentry name. It will be used later for bugfix Signed-off-by: leilei.lin --- fs/dcache.c| 38 ++ include/linux/dcache.h | 2 ++ 2 files changed, 40 insertions(+) diff --git a/fs/dcache.c

[PATCH 0/2] fsnotify: fix mem overwritten

From: "leilei.lin" Slub alloced mem overwritten ocurrs when fsnotify thread was copying the dentry name and another rename thread change the dentry name at same time. These patches do the following: 1. A new copy_dname method was created which copy file_name to new alloc mem. The later

[PATCH 2/2] fsnotify: use method copy_dname copying filename

From: "leilei.lin" Kernel got panicked in inotify_handle_event, while running the rename operation against the same file. The root cause is that the race between fsnotify thread and file rename thread. When fsnotify thread was copying the dentry name, another rename thread could change the