Date: Thu, 15 Sep 2016 23:44:16 +0300 From: Slawa Olhovchenkov <slw@zxy.spb.ru> To: John Baldwin <jhb@freebsd.org> Cc: freebsd-stable@freebsd.org Subject: Re: nginx and FreeBSD11 Message-ID: <20160915204416.GZ2840@zxy.spb.ru> In-Reply-To: <15357564.UUkYdbUZHc@ralph.baldwin.cx> References: <20160907191348.GD22212@zxy.spb.ru> <1823460.vTm8IvUQsF@ralph.baldwin.cx> <20160915174948.GW2840@zxy.spb.ru> <15357564.UUkYdbUZHc@ralph.baldwin.cx>
next in thread | previous in thread | raw e-mail | index | archive | help
On Thu, Sep 15, 2016 at 11:54:12AM -0700, John Baldwin wrote:
> On Thursday, September 15, 2016 08:49:48 PM Slawa Olhovchenkov wrote:
> > On Thu, Sep 15, 2016 at 10:28:11AM -0700, John Baldwin wrote:
> >
> > > On Thursday, September 15, 2016 05:41:03 PM Slawa Olhovchenkov wrote:
> > > > On Wed, Sep 07, 2016 at 10:13:48PM +0300, Slawa Olhovchenkov wrote:
> > > >
> > > > > I am have strange issuse with nginx on FreeBSD11.
> > > > > I am have FreeBSD11 instaled over STABLE-10.
> > > > > nginx build for FreeBSD10 and run w/o recompile work fine.
> > > > > nginx build for FreeBSD11 crushed inside rbtree lookups: next node
> > > > > totaly craped.
> > > > >
> > > > > I am see next potential cause:
> > > > >
> > > > > 1) clang 3.8 code generation issuse
> > > > > 2) system library issuse
> > > > >
> > > > > may be i am miss something?
> > > > >
> > > > > How to find real cause?
> > > >
> > > > I find real cause and this like show-stopper for RELEASE.
> > > > I am use nginx with AIO and AIO from one nginx process corrupt memory
> > > > from other nginx process. Yes, this is cross-process memory
> > > > corruption.
> > > >
> > > > Last case, core dumped proccess with pid 1060 at 15:45:14.
> > > > Corruped memory at 0x860697000.
> > > > I am know about good memory at 0x86067f800.
> > > > Dumping (form core) this region to file and analyze by hexdump I am
> > > > found start of corrupt region -- offset 0000c8c0 from 0x86067f800.
> > > > 0x86067f800+0xc8c0 = 0x86068c0c0
> > > >
> > > > I am preliminary enabled debuggin of AIO started operation to nginx
> > > > error log (memory address, file name, offset and size of transfer).
> > > >
> > > > grep -i 86068c0c0 error.log near 15:45:14 give target file.
> > > > grep ce949665cbcd.hls error.log near 15:45:14 give next result:
> > > >
> > > > 2016/09/15 15:45:13 [notice] 1055#0: *11659936 AIO_RD 000000082065DB60 start 000000086068C0C0 561b0 2646736 ce949665cbcd.hls
> > > > 2016/09/15 15:45:14 [notice] 1060#0: *10998125 AIO_RD 000000081F1FFB60 start 000000086FF2C0C0 6cdf0 140016832 ce949665cbcd.hls
> > > > 2016/09/15 15:45:14 [notice] 1055#0: *11659936 AIO_RD 00000008216B6B60 start 000000086472B7C0 7ff70 2999424 ce949665cbcd.hls
> > >
> > > Does nginx only use AIO for regular files or does it also use it with sockets?
> >
> > Only for regular files.
> >
> > > You can try using this patch as a diagnostic (you will need to
> > > run with INVARIANTS enabled,
> >
> > How much debugs produced?
> > I am have about 5-10K aio's per second.
> >
> > > or at least enabled for vfs_aio.c):
> >
> > How I can do this (enable INVARIANTS for vfs_aio.c)?
>
> Include INVARIANT_SUPPORT in your kernel and add a line with:
>
> #define INVARIANTS
>
> at the top of sys/kern/vfs_aio.c.
# sysctl -a | grep -i inva
kern.timecounter.invariant_tsc: 1
kern.features.invariant_support: 1
options INVARIANT_SUPPORT
but no string `vmspace mismatch` in kernel.
May be I am miss some?
#define INVARIANTS
#include <sys/cdefs.h>
__FBSDID("$FreeBSD: stable/11/sys/kern/vfs_aio.c 304738 2016-08-24
09:18:38Z kib $");
#include "opt_compat.h"
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/malloc.h>
#include <sys/bio.h>
#include <sys/buf.h>
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?20160915204416.GZ2840>