[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-ID: <1479680873.8455.386.camel@edumazet-glaptop3.roam.corp.google.com>
Date: Sun, 20 Nov 2016 14:27:53 -0800
From: Eric Dumazet <eric.dumazet@...il.com>
To: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: Linux 4.9-rc6
On Sun, 2016-11-20 at 14:05 -0800, Linus Torvalds wrote:
> That said, nothing particular is bothering me all that much, but we've
> had some of the VMALLOC_STACK fixups continue to trickle in, so I
> worry that we're not quite done there yet. And let's see what
> Thorsten's regression list looks like next week. So no decision yet,
> it could still go either way.
Hosts with ~100,000 threads have an issue with /prov/vmallocinfo
It can take about 800 usec to skip over ~100,000 struct vmap_area
in s_start(), while holding vmap_area_lock spinlock, and therefore
blocking fork()/pthread_create().
I presume we can not switch to the rbtree (vmap_area_root)
for /proc/vmallocinfo, because this file is seek-able, right ?
Powered by blists - more mailing lists