The patch titled
Subject: proc: smaller RCU section in ->getattr()
has been added to the -mm tree. Its filename is
proc-smaller-rcu-section-in-getattr.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/proc-smaller-rcu-section-in-getattr.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/proc-smaller-rcu-section-in-getattr.patch
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*** Remember to use Documentation/process/submit-checklist.rst when testing your code ***
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------------------------------------------------------
From: Alexey Dobriyan <adobriyan@xxxxxxxxx>
Subject: proc: smaller RCU section in ->getattr()
struct kstat is thread local.
Link: http://lkml.kernel.org/r/20180423213626.GB9043@avx2
Signed-off-by: Alexey Dobriyan <adobriyan@xxxxxxxxx>
Reviewed-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Cc: Al Viro <viro@xxxxxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
fs/proc/base.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff -puN fs/proc/base.c~proc-smaller-rcu-section-in-getattr fs/proc/base.c
--- a/fs/proc/base.c~proc-smaller-rcu-section-in-getattr
+++ a/fs/proc/base.c
@@ -1757,9 +1757,9 @@ int pid_getattr(const struct path *path,
generic_fillattr(inode, stat);
- rcu_read_lock();
stat->uid = GLOBAL_ROOT_UID;
stat->gid = GLOBAL_ROOT_GID;
+ rcu_read_lock();
task = pid_task(proc_pid(inode), PIDTYPE_PID);
if (task) {
if (!has_pid_permissions(pid, task, HIDEPID_INVISIBLE)) {
_
Patches currently in -mm which might be from adobriyan@xxxxxxxxx are
proc-make-proc-cmdline-go-through-lsm.patch
proc-more-unsigned-int-in-proc-cmdline.patch
proc-somewhat-simpler-code-for-proc-cmdline.patch
proc-simpler-iterations-for-proc-cmdline.patch
proc-deduplicate-proc-cmdline-implementation.patch
proc-smaller-rcu-section-in-getattr.patch
proc-use-unsigned-int-in-proc_fill_cache.patch
proc-skip-branch-in-proc-lookup.patch
proc-use-unsigned-int-for-sigqueue-length.patch
proc-use-unsigned-int-for-proc-stack.patch
coredump-fix-spam-with-zero-vma-process.patch
seq_file-delete-small-value-optimization.patch
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