From: Dave Hansen <dave.hansen@linux.intel.com>
To: Ruchi Kandoi <kandoiruchi@google.com>,
gregkh@linuxfoundation.org, arve@android.com,
riandrews@android.com, sumit.semwal@linaro.org, arnd@arndb.de,
labbott@redhat.com, viro@zeniv.linux.org.uk,
jlayton@poochiereds.net, bfields@fieldses.org, mingo@redhat.com,
peterz@infradead.org, akpm@linux-foundation.org,
keescook@chromium.org, mhocko@suse.com, oleg@redhat.com,
john.stultz@linaro.org, mguzik@redhat.com, jdanis@google.com,
adobriyan@gmail.com, ghackmann@google.com,
kirill.shutemov@linux.intel.com, vbabka@suse.cz,
dan.j.williams@intel.com, hannes@cmpxchg.org,
iamjoonsoo.kim@lge.com, luto@kernel.org, tj@kernel.org,
vdavydov.dev@gmail.com, ebiederm@xmission.com,
linux-kernel@vger.kernel.org, devel@driverdev.osuosl.org,
linux-media@vger.kernel.org, dri-devel@lists.freedesktop.org,
linaro-mm-sig@lists.linaro.org, linux-fsdevel@vger.kernel.org,
linux-mm@kvack.org
Subject: Re: [RFC 0/6] Module for tracking/accounting shared memory buffers
Date: Wed, 12 Oct 2016 10:15:50 -0700 [thread overview]
Message-ID: <57FE6FC6.70205@linux.intel.com> (raw)
In-Reply-To: <1476229810-26570-1-git-send-email-kandoiruchi@google.com>
On 10/11/2016 04:50 PM, Ruchi Kandoi wrote:
> Any process holding a reference to these buffers will keep the kernel from
> reclaiming its backing pages. mm counters don't provide a complete picture of
> these allocations, since they only account for pages that are mapped into a
> process's address space. This problem is especially bad for systems like
> Android that use dma-buf fds to share graphics and multimedia buffers between
> processes: these allocations are often large, have complex sharing patterns,
> and are rarely mapped into every process that holds a reference to them.
What do you end up _doing_ with all this new information that you have
here? You know which processes have "pinned" these shared buffers, and
exported that information in /proc. But, then what?
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prev parent reply other threads:[~2016-10-12 17:15 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-10-11 23:50 Ruchi Kandoi
2016-10-11 23:50 ` [RFC 1/6] fs: add installed and uninstalled file_operations Ruchi Kandoi
2016-10-11 23:50 ` [RFC 2/6] drivers: misc: add memtrack Ruchi Kandoi
2016-10-11 23:50 ` [RFC 3/6] dma-buf: add memtrack support Ruchi Kandoi
2016-10-11 23:50 ` [RFC 4/6] memtrack: Adds the accounting to keep track of all mmaped/unmapped pages Ruchi Kandoi
2016-10-11 23:50 ` [RFC 5/6] memtrack: Add memtrack accounting for forked processes Ruchi Kandoi
2016-10-11 23:50 ` [RFC 6/6] drivers: staging: ion: add ION_IOC_TAG ioctl Ruchi Kandoi
2016-10-12 3:29 ` Hillf Danton
2016-10-12 0:26 ` [RFC 0/6] Module for tracking/accounting shared memory buffers Al Viro
2016-10-12 1:14 ` Rob Clark
2016-10-12 9:09 ` Christian König
2016-10-12 17:15 ` Dave Hansen [this message]
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