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From: Mikulas Patocka <mpatocka@redhat.com>
To: Michal Hocko <mhocko@kernel.org>
Cc: Matthew Wilcox <willy@infradead.org>,
David Miller <davem@davemloft.net>,
Andrew Morton <akpm@linux-foundation.org>,
linux-mm@kvack.org, eric.dumazet@gmail.com, edumazet@google.com,
bhutchings@solarflare.com, netdev@vger.kernel.org,
linux-kernel@vger.kernel.org, mst@redhat.com,
jasowang@redhat.com, virtualization@lists.linux-foundation.org,
dm-devel@redhat.com, Vlastimil Babka <vbabka@suse.cz>
Subject: Re: [PATCH] kvmalloc: always use vmalloc if CONFIG_DEBUG_VM
Date: Mon, 23 Apr 2018 19:20:11 -0400 (EDT) [thread overview]
Message-ID: <alpine.LRH.2.02.1804231911280.25912@file01.intranet.prod.int.rdu2.redhat.com> (raw)
In-Reply-To: <20180423151015.GT17484@dhcp22.suse.cz>
On Mon, 23 Apr 2018, Michal Hocko wrote:
> On Mon 23-04-18 10:24:02, Mikulas Patocka wrote:
>
> > > Really, we have a fault injection framework and this sounds like
> > > something to hook in there.
> >
> > The testing people won't set it up. They install the "kernel-debug"
> > package and run the tests in it.
> >
> > If you introduce a hidden option that no one knows about, no one will use
> > it.
>
> then make sure people know about it. Fuzzers already do test fault
> injections.
I think that in the long term we can introduce a kernel parameter like
"debug_level=1", "debug_level=2", "debug_level=3" that will turn on
debugging features across all kernel subsystems and we can teach users to
use it to diagnose problems.
But it won't work if every subsystem has different debug parameters. There
are 192 distinct filenames in debugfs, if we add 193rd one, harly anyone
notices it.
Mikulas
next prev parent reply other threads:[~2018-04-23 23:20 UTC|newest]
Thread overview: 110+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-04-18 14:34 [PATCH] net: don't use kvzalloc for DMA memory Mikulas Patocka
2018-04-18 16:05 ` Eric Dumazet
2018-04-18 16:44 ` Mikulas Patocka
2018-04-18 16:51 ` Eric Dumazet
2018-04-18 17:47 ` David Miller
2018-04-18 17:55 ` Mikulas Patocka
2018-04-18 18:00 ` Michael S. Tsirkin
2018-04-18 17:49 ` Mikulas Patocka
2018-04-18 17:46 ` David Miller
2018-04-18 17:53 ` Mikulas Patocka
2018-04-19 16:12 ` [PATCH] kvmalloc: always use vmalloc if CONFIG_DEBUG_VM Mikulas Patocka
2018-04-19 16:25 ` Eric Dumazet
2018-04-19 16:28 ` Mikulas Patocka
2018-04-19 16:43 ` Michael S. Tsirkin
2018-04-19 21:27 ` [PATCH] kvmalloc: always use vmalloc if CONFIG_DEBUG_SG Mikulas Patocka
2018-04-19 18:28 ` [PATCH] kvmalloc: always use vmalloc if CONFIG_DEBUG_VM Vlastimil Babka
2018-04-19 19:47 ` Andrew Morton
2018-04-19 21:19 ` Mikulas Patocka
2018-04-19 23:22 ` Andrew Morton
2018-04-20 12:16 ` Mikulas Patocka
2018-04-20 11:47 ` Matthew Wilcox
2018-04-20 12:20 ` Mikulas Patocka
2018-04-23 15:25 ` Michael S. Tsirkin
2018-04-20 13:08 ` Michal Hocko
2018-04-20 13:41 ` Matthew Wilcox
2018-04-20 13:49 ` Michal Hocko
2018-04-20 20:56 ` Mikulas Patocka
2018-04-20 20:54 ` Mikulas Patocka
2018-04-20 21:02 ` Matthew Wilcox
2018-04-20 21:21 ` Mikulas Patocka
2018-04-21 14:47 ` Matthew Wilcox
2018-04-22 13:03 ` Michal Hocko
2018-04-23 14:24 ` Mikulas Patocka
2018-04-23 15:10 ` Michal Hocko
2018-04-23 23:20 ` Mikulas Patocka [this message]
2018-04-23 14:06 ` Mikulas Patocka
2018-04-23 15:15 ` Michal Hocko
2018-04-24 0:06 ` [PATCH v3] kvmalloc: always use vmalloc if CONFIG_DEBUG_SG Mikulas Patocka
2018-04-24 2:47 ` David Rientjes
2018-04-24 11:04 ` Mikulas Patocka
2018-04-24 3:46 ` Matthew Wilcox
2018-04-24 12:29 ` Mikulas Patocka
2018-04-24 17:16 ` Matthew Wilcox
2018-04-24 18:41 ` Mikulas Patocka
2018-05-15 1:13 ` Joonsoo Kim
2018-04-24 12:51 ` Michal Hocko
2018-04-24 15:50 ` Mikulas Patocka
2018-04-24 16:29 ` Michal Hocko
2018-04-24 17:00 ` Mikulas Patocka
2018-04-24 17:03 ` Michal Hocko
2018-04-24 17:28 ` Mikulas Patocka
2018-04-24 17:38 ` Michal Hocko
2018-04-25 20:02 ` [PATCH] fault-injection: reorder config entries Mikulas Patocka
2018-04-26 3:21 ` Randy Dunlap
2018-04-25 20:02 ` [PATCH v4] fault-injection: introduce kvmalloc fallback options Mikulas Patocka
2018-04-25 20:20 ` Randy Dunlap
2018-04-25 20:57 ` [PATCH v5] " Mikulas Patocka
2018-04-25 21:11 ` Randy Dunlap
2018-04-25 21:18 ` David Rientjes
2018-04-25 21:22 ` Mikulas Patocka
2018-04-25 22:17 ` [dm-devel] " James Bottomley
2018-04-25 22:42 ` Mikulas Patocka
2018-04-25 22:49 ` David Rientjes
2018-04-25 22:56 ` Mikulas Patocka
2018-04-26 12:58 ` Michal Hocko
2018-04-26 14:28 ` Mikulas Patocka
2018-04-26 14:45 ` James Bottomley
2018-04-26 15:05 ` Mikulas Patocka
2018-04-26 15:24 ` James Bottomley
2018-04-26 15:44 ` Mikulas Patocka
2018-04-26 15:59 ` Michael S. Tsirkin
2018-04-26 16:07 ` Mikulas Patocka
2018-04-26 18:49 ` Michael S. Tsirkin
2018-04-26 18:54 ` Mikulas Patocka
2018-04-26 19:14 ` Michael S. Tsirkin
2018-04-26 19:36 ` Mikulas Patocka
2018-04-26 19:45 ` Michael S. Tsirkin
2018-04-26 20:05 ` Mikulas Patocka
2018-04-26 18:58 ` Mikulas Patocka
2018-04-26 19:05 ` Michael S. Tsirkin
2018-04-26 15:55 ` Mikulas Patocka
2018-04-25 23:00 ` Mikulas Patocka
2018-04-25 23:08 ` James Bottomley
2018-04-26 14:55 ` Mikulas Patocka
2018-04-26 15:22 ` Mikulas Patocka
2018-04-26 18:58 ` John Stoffel
2018-04-26 21:50 ` Mikulas Patocka
2018-04-26 22:21 ` Michael S. Tsirkin
2018-04-26 22:52 ` Mikulas Patocka
2018-04-27 8:25 ` Michal Hocko
2018-04-27 10:20 ` Mikulas Patocka
2018-04-27 23:20 ` Mikulas Patocka
2018-04-30 18:27 ` John Stoffel
2018-04-30 21:07 ` Mikulas Patocka
2018-05-02 13:38 ` John Stoffel
2018-05-03 17:40 ` Mikulas Patocka
2018-04-24 0:25 ` [PATCH] kvmalloc: always use vmalloc if CONFIG_DEBUG_VM Mikulas Patocka
2018-04-24 13:31 ` Michal Hocko
2018-04-24 15:30 ` Mikulas Patocka
2018-04-24 16:12 ` Michal Hocko
2018-04-24 16:29 ` Michal Hocko
2018-04-24 16:33 ` Mikulas Patocka
2018-05-02 0:36 ` Andrew Morton
2018-05-02 13:33 ` Mike Snitzer
2018-05-02 13:40 ` [dm-devel] " John Stoffel
2018-05-03 17:32 ` [PATCH] " Mikulas Patocka
2018-04-18 17:45 ` [PATCH] net: don't use kvzalloc for DMA memory David Miller
2018-04-18 17:55 ` Michael S. Tsirkin
2018-04-18 20:38 ` Eric Dumazet
2018-04-19 4:00 ` Michael S. Tsirkin
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