From: David Sterba <dsterba@suse.cz>
To: Michal Hocko <mhocko@kernel.org>
Cc: Andrew Morton <akpm@linux-foundation.org>,
Colin Cross <ccross@android.com>,
Hariprasad S <hariprasad@chelsio.com>,
Santosh Raspatur <santosh@chelsio.com>,
Kees Cook <keescook@chromium.org>,
Johannes Weiner <hannes@cmpxchg.org>,
Heiko Carstens <heiko.carstens@de.ibm.com>,
Martin Schwidefsky <schwidefsky@de.ibm.com>,
Anton Vorontsov <anton@enomsg.org>,
Eric Dumazet <eric.dumazet@gmail.com>,
Ilya Dryomov <idryomov@gmail.com>,
Kent Overstreet <kent.overstreet@gmail.com>,
Herbert Xu <herbert@gondor.apana.org.au>,
David Rientjes <rientjes@google.com>,
Andreas Dilger <andreas.dilger@intel.com>,
Dan Williams <dan.j.williams@intel.com>,
Oleg Drokin <oleg.drokin@intel.com>,
Tony Luck <tony.luck@intel.com>,
Alexei Starovoitov <ast@kernel.org>,
linux-mm@kvack.org, Tariq Toukan <tariqt@mellanox.com>,
Yishai Hadas <yishaih@mellanox.com>,
Boris Ostrovsky <boris.ostrovsky@oracl
Subject: Re: [PATCH 5/6] treewide: use kv[mz]alloc* rather than opencoded variants
Date: Thu, 12 Jan 2017 16:57:43 +0100 [thread overview]
Message-ID: <20170112155743.GN12081@suse.cz> (raw)
In-Reply-To: <20170112153717.28943-6-mhocko@kernel.org>
On Thu, Jan 12, 2017 at 04:37:16PM +0100, Michal Hocko wrote:
> From: Michal Hocko <mhocko@suse.com>
>
> There are many code paths opencoding kvmalloc. Let's use the helper
> instead. The main difference to kvmalloc is that those users are usually
> not considering all the aspects of the memory allocator. E.g. allocation
> requests < 64kB are basically never failing and invoke OOM killer to
> satisfy the allocation. This sounds too disruptive for something that
> has a reasonable fallback - the vmalloc. On the other hand those
> requests might fallback to vmalloc even when the memory allocator would
> succeed after several more reclaim/compaction attempts previously. There
> is no guarantee something like that happens though.
>
> This patch converts many of those places to kv[mz]alloc* helpers because
> they are more conservative.
For the btrfs bits,
Acked-by: David Sterba <dsterba@suse.com>
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next prev parent reply other threads:[~2017-01-12 15:57 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20170112153717.28943-1-mhocko@kernel.org>
2017-01-12 15:37 ` [PATCH 5/6] treewide: use kv[mz]alloc* rather than opencoded variants Michal Hocko
2017-01-12 15:57 ` David Sterba [this message]
2017-01-12 16:05 ` Christian Borntraeger
2017-01-12 16:54 ` Ilya Dryomov
2017-01-12 17:18 ` Michal Hocko
2017-01-12 17:00 ` Dan Williams
2017-01-12 17:26 ` Kees Cook
2017-01-12 17:37 ` Michal Hocko
2017-01-20 13:41 ` Vlastimil Babka
2017-01-24 15:00 ` Michal Hocko
2017-01-25 11:15 ` Vlastimil Babka
2017-01-25 13:09 ` Michal Hocko
2017-01-25 13:40 ` Ilya Dryomov
2017-01-12 17:29 ` Michal Hocko
2017-01-12 20:14 ` Boris Ostrovsky
2017-01-13 1:11 ` Dilger, Andreas
2017-01-14 10:56 ` Leon Romanovsky
2017-01-16 7:33 ` Michal Hocko
2017-01-16 8:28 ` Leon Romanovsky
2017-01-16 8:18 ` Tariq Toukan
2017-01-12 15:37 ` [RFC PATCH 6/6] net: use kvmalloc with __GFP_REPEAT rather than open coded variant Michal Hocko
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