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From: Andrew Morton <akpm@linux-foundation.org>
To: David Hildenbrand <david@redhat.com>
Cc: Suren Baghdasaryan <surenb@google.com>,
	mhocko@kernel.org, mhocko@suse.com, rientjes@google.com,
	willy@infradead.org, hannes@cmpxchg.org, guro@fb.com,
	riel@surriel.com, minchan@kernel.org, christian@brauner.io,
	hch@infradead.org, oleg@redhat.com, jannh@google.com,
	shakeelb@google.com, luto@kernel.org,
	christian.brauner@ubuntu.com, fweimer@redhat.com,
	jengelh@inai.de, timmurray@google.com, linux-api@vger.kernel.org,
	linux-mm@kvack.org, linux-kernel@vger.kernel.org,
	kernel-team@android.com
Subject: Re: [PATCH v2 1/3] mm, oom: move task_will_free_mem up in the file to be used in process_mrelease
Date: Tue, 20 Jul 2021 16:07:07 -0700	[thread overview]
Message-ID: <20210720160707.2332738708948f7d865d67c1@linux-foundation.org> (raw)
In-Reply-To: <7eb17da6-03a6-5eaf-16e6-97b53ba163d8@redhat.com>

On Tue, 20 Jul 2021 14:43:52 +0200 David Hildenbrand <david@redhat.com> wrote:

> On 18.07.21 23:41, Suren Baghdasaryan wrote:
> > process_mrelease needs to be added in the CONFIG_MMU-dependent block which
> > comes before __task_will_free_mem and task_will_free_mem. Move these
> > functions before this block so that new process_mrelease syscall can use
> > them.
> > 
> > Signed-off-by: Suren Baghdasaryan <surenb@google.com>
> > ---
> > changes in v2:
> > - Fixed build error when CONFIG_MMU=n, reported by kernel test robot. This
> > required moving task_will_free_mem implemented in the first patch
> > - Renamed process_reap to process_mrelease, per majority of votes
> > - Replaced "dying process" with "process which was sent a SIGKILL signal" in
> > the manual page text, per Florian Weimer
> > - Added ERRORS section in the manual page text
> > - Resolved conflicts in syscall numbers caused by the new memfd_secret syscall
> > - Separated boilerplate code wiring-up the new syscall into a separate patch
> > to facilitate the review process
> > 
> >   mm/oom_kill.c | 150 +++++++++++++++++++++++++-------------------------
> >   1 file changed, 75 insertions(+), 75 deletions(-)
> 
> TBH, I really dislike this move as it makes git blame a lot harder with 
> any real benefit.
> 
> Can't you just use prototypes to avoid the move for now in patch #2?
> 
> static bool task_will_free_mem(struct task_struct *task);

This change makes the code better - it's silly to be adding forward
declarations just because the functions are in the wrong place.

If that messes up git-blame then let's come up with better tooling
rather than suffering poorer kernel code because the tools aren't doing
what we want of them.  Surely?

  parent reply	other threads:[~2021-07-20 23:07 UTC|newest]

Thread overview: 17+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-07-18 21:41 Suren Baghdasaryan
2021-07-18 21:41 ` [PATCH v2 2/3] mm: introduce process_mrelease system call Suren Baghdasaryan
2021-07-21  8:02   ` David Hildenbrand
2021-07-21 15:43     ` Suren Baghdasaryan
2021-07-21 22:59       ` Suren Baghdasaryan
2021-07-22  7:45         ` David Hildenbrand
2021-07-18 21:41 ` [PATCH v2 3/3] mm: wire up syscall process_mrelease Suren Baghdasaryan
2021-07-20 12:43 ` [PATCH v2 1/3] mm, oom: move task_will_free_mem up in the file to be used in process_mrelease David Hildenbrand
2021-07-20 16:18   ` Suren Baghdasaryan
2021-07-20 23:07   ` Andrew Morton [this message]
2021-07-21  7:30     ` David Hildenbrand
2021-07-21 15:33       ` Suren Baghdasaryan
2021-07-21 16:12         ` David Hildenbrand
2021-07-21 20:19           ` Suren Baghdasaryan
2021-07-21 20:50             ` Andrew Morton
2021-07-21 20:59               ` Suren Baghdasaryan
2021-07-23  1:15                 ` Suren Baghdasaryan

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