linux-kernel - [PATCH 0/2] vunmap and debug objects

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Date:   Fri, 13 Apr 2018 17:03:52 +0530
From:   Chintan Pandya <cpandya@...eaurora.org>
To:     vbabka@...e.cz, labbott@...hat.com, catalin.marinas@....com,
        hannes@...xchg.org, f.fainelli@...il.com, xieyisheng1@...wei.com,
        ard.biesheuvel@...aro.org, richard.weiyang@...il.com,
        byungchul.park@....com
Cc:     linux-mm@...ck.org, linux-kernel@...r.kernel.org,
        Chintan Pandya <cpandya@...eaurora.org>
Subject: [PATCH 0/2] vunmap and debug objects

I'm not entirely sure, how debug objects are really
useful in vmalloc framework.

I'm assuming they are useful in some ways. So, there
are 2 issues in that. First patch is avoiding possible
race scenario and second patch passes _proper_ args
in debug object APIs. Both these patches can help
debug objects to be in consistent state.

We've observed some list corruptions in debug objects.
However, no claims that these patches will be fixing
them.

If one has an opinion that debug object has no use in
vmalloc framework, I would raise a patch to remove
them from the vunmap leg.

Chintan Pandya (2):
  mm: vmalloc: Avoid racy handling of debugobjects in vunmap
  mm: vmalloc: Pass proper vm_start into debugobjects

 mm/vmalloc.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

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