tree 7824ca84bfe71c3fe2c09a1fedc31106fec4f500
parent 662795deb854b31501e0ffb42b7f0cce802c134a
author Eric W. Biederman <ebiederm@xmission.com> 1151306748 -0700
committer Linus Torvalds <torvalds@g5.osdl.org> 1151341104 -0700

[PATCH] proc: Rewrite the proc dentry flush on exit optimization

To keep the dcache from filling up with dead /proc entries we flush them on
process exit.  However over the years that code has gotten hairy with a
dentry_pointer and a lock in task_struct and misdocumented as a correctness
feature.

I have rewritten this code to look and see if we have a corresponding entry in
the dcache and if so flush it on process exit.  This removes the extra fields
in the task_struct and allows me to trivially handle the case of a
/proc/<tgid>/task/<pid> entry as well as the current /proc/<pid> entries.

Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>