From: Eric Dumazet <edumazet@google.com>
To: Andrzej Hajda <andrzej.hajda@intel.com>
Cc: LKML <linux-kernel@vger.kernel.org>,
intel-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org,
netdev <netdev@vger.kernel.org>,
Jani Nikula <jani.nikula@linux.intel.com>,
Daniel Vetter <daniel@ffwll.ch>,
Lucas De Marchi <lucas.demarchi@intel.com>,
Chris Wilson <chris.p.wilson@intel.com>,
Dmitry Vyukov <dvyukov@google.com>,
Jakub Kicinski <kuba@kernel.org>
Subject: Re: [PATCH 2/9] lib/ref_tracker: compact stacktraces before printing
Date: Fri, 18 Feb 2022 05:01:04 -0800 [thread overview]
Message-ID: <CANn89iLS5oqOvafFy9SW0CDiyv9GGJYsE8MpE200K5NaA8h0xw@mail.gmail.com> (raw)
In-Reply-To: <199aebfb-f364-cd9b-5d2b-dbe42b779a41@intel.com>
On Fri, Feb 18, 2022 at 2:55 AM Andrzej Hajda <andrzej.hajda@intel.com> wrote:
>
> OK, could be faster and less invasive.
> Other solution would be keeping the array in dir and update in every
> tracker alloc/free, this way we avoid iteration over potentially big
> list, but it would cost memory and since printing is rather rare I am
> not sure if it is worth.
printing is extremely rare [1]
We want to use ref_tracker in production, we need to keep the fast
path as fast as possible ;)
[1] If you think about providing access to the traces from sysfs, we
might need to make sure we do not hold the dir spinlock
during the expensive generation of the output data.
next prev parent reply other threads:[~2022-02-18 13:01 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-02-17 14:04 [PATCH 0/9] drm/i915: use ref_tracker library for tracking wakerefs Andrzej Hajda
2022-02-17 14:04 ` [PATCH 1/9] lib/ref_tracker: add unlocked leak print helper Andrzej Hajda
2022-02-17 14:04 ` [PATCH 2/9] lib/ref_tracker: compact stacktraces before printing Andrzej Hajda
2022-02-17 15:23 ` Eric Dumazet
2022-02-17 15:25 ` Eric Dumazet
2022-02-18 10:54 ` Andrzej Hajda
2022-02-18 13:01 ` Eric Dumazet [this message]
2022-02-17 14:04 ` [PATCH 3/9] lib/ref_tracker: __ref_tracker_dir_print improve printing Andrzej Hajda
2022-02-17 15:38 ` Eric Dumazet
2022-02-18 10:11 ` Andrzej Hajda
2022-02-17 14:04 ` [PATCH 4/9] lib/ref_tracker: add printing to memory buffer Andrzej Hajda
2022-02-17 14:04 ` [PATCH 5/9] lib/ref_tracker: improve allocation flags Andrzej Hajda
2022-02-17 15:13 ` Eric Dumazet
2022-02-18 10:28 ` Andrzej Hajda
2022-02-18 13:05 ` Eric Dumazet
2022-02-17 14:04 ` [PATCH 6/9] drm/i915: Separate wakeref tracking Andrzej Hajda
2022-02-17 14:48 ` [Intel-gfx] " Ville Syrjälä
2022-02-18 10:32 ` Andrzej Hajda
2022-02-17 14:04 ` [PATCH 7/9] drm/i915: Track leaked gt->wakerefs Andrzej Hajda
2022-02-17 14:04 ` [PATCH 8/9] drm/i915: Correct type of wakeref variable Andrzej Hajda
2022-02-17 14:04 ` [PATCH 9/9] drm/i915: replace Intel internal tracker with kernel core ref_tracker Andrzej Hajda
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