From: Cyril Hrubis <chrubis@suse.cz>
To: kernel test robot <oliver.sang@intel.com>
Cc: Edward AD <eadavis@sina.com>,
syzbot+b591856e0f0139f83023@syzkaller.appspotmail.com,
lkp@intel.com, syzkaller-bugs@googlegroups.com,
linux-kernel@vger.kernel.org, linux-mm@kvack.org,
oe-lkp@lists.linux.dev, akpm@linux-foundation.org,
ltp@lists.linux.it
Subject: Re: [LTP] [PATCH] mm: as the same logic with queue_pages_range
Date: Wed, 13 Sep 2023 11:10:10 +0200 [thread overview]
Message-ID: <ZQF8cn4k1qqdYj8x@yuki> (raw)
In-Reply-To: <202309121302.8864096c-oliver.sang@intel.com>
Hi!
> Running tests.......
> <<<test_start>>>
> tag=vma02 stime=1694438526
> cmdline="vma02"
> contacts=""
> analysis=exit
> <<<test_output>>>
> vma02 0 TINFO : pid = 3639 addr = 0x7f5202dd6000
> vma02 0 TINFO : start = 0x7f5202dd6000, end = 0x7f5202dd7000
> vma02 0 TINFO : start = 0x7f5202dd7000, end = 0x7f5202dd8000
> vma02 0 TINFO : start = 0x7f5202dd8000, end = 0x7f5202dd9000
> vma02 1 TFAIL : vma02.c:144: >1 unmerged VMAs.
> incrementing stop
So the test is reproducer for:
commit 9d8cebd4bcd7c3878462fdfda34bbcdeb4df7ef4
Author: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Date: Fri Mar 5 13:41:57 2010 -0800
mm: fix mbind vma merge problem
Strangely, current mbind() doesn't merge vma with neighbor vma although it's possible.
Unfortunately, many vma can reduce performance...
And what the test does is:
- map 3 continous pages
- popluate
- mbind() first page
- mbind() all three pages
- checks that there is only single VMA for the pages after second
mbind()
--
Cyril Hrubis
chrubis@suse.cz
next prev parent reply other threads:[~2023-09-13 9:09 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-09-06 1:03 [syzbot] [mm?] kernel BUG in vma_replace_policy syzbot
2023-09-06 6:19 ` [PATCH] mm: as the same logic with queue_pages_range Edward AD
2023-09-06 12:06 ` Matthew Wilcox
2023-09-12 5:20 ` kernel test robot
2023-09-13 9:10 ` Cyril Hrubis [this message]
2023-09-14 5:53 ` [PATCH] mm: extpand queue_pages_range() to find and lock the vma range Edward AD
2023-09-12 5:30 ` [syzbot] [mm?] kernel BUG in vma_replace_policy Matthew Wilcox
2023-09-12 6:09 ` syzbot
2023-09-12 14:55 ` Matthew Wilcox
2023-09-12 15:03 ` Suren Baghdasaryan
2023-09-12 16:00 ` Suren Baghdasaryan
2023-09-13 16:05 ` Suren Baghdasaryan
2023-09-13 16:46 ` Suren Baghdasaryan
2023-09-14 18:20 ` Suren Baghdasaryan
2023-09-14 19:09 ` Matthew Wilcox
2023-09-14 20:00 ` Suren Baghdasaryan
2023-09-14 20:53 ` Suren Baghdasaryan
2023-09-14 21:24 ` Matthew Wilcox
2023-09-14 22:21 ` Suren Baghdasaryan
2023-09-15 4:26 ` Hugh Dickins
2023-09-15 16:09 ` Suren Baghdasaryan
2023-09-15 18:05 ` Suren Baghdasaryan
2023-09-16 2:43 ` Hugh Dickins
2023-09-18 21:20 ` Suren Baghdasaryan
2023-09-15 18:26 ` Matthew Wilcox
2023-09-16 2:54 ` Hugh Dickins
2023-09-16 1:35 ` Yang Shi
2023-09-16 3:57 ` Hugh Dickins
2023-09-18 22:34 ` Yang Shi
2023-09-19 0:34 ` Hugh Dickins
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