From: Sasha Levin <sasha.levin@oracle.com>
To: Konstantin Khlebnikov <koct9i@gmail.com>,
linux-mm@kvack.org, Andrew Morton <akpm@linux-foundation.org>
Cc: Hugh Dickins <hughd@google.com>,
linux-kernel@vger.kernel.org,
Dave Hansen <dave.hansen@intel.com>Hugh Dickins
<hughd@google.com>
Subject: Re: [PATCH 3/3] mm: catch memory commitment underflow
Date: Sun, 18 Jan 2015 06:34:10 -0500 [thread overview]
Message-ID: <54BB9A32.7080703@oracle.com> (raw)
In-Reply-To: <20140624201614.18273.39034.stgit@zurg>
On 06/24/2014 04:16 PM, Konstantin Khlebnikov wrote:
> This patch prints warning (if CONFIG_DEBUG_VM=y) when
> memory commitment becomes too negative.
>
> Signed-off-by: Konstantin Khlebnikov <koct9i@gmail.com>
Hi Konstantin,
I seem to be hitting this warning when fuzzing on the latest -next kernel:
[ 683.674323] ------------[ cut here ]------------
[ 683.675552] WARNING: CPU: 12 PID: 25654 at mm/mmap.c:157 __vm_enough_memory+0x1b7/0x1d0()
[ 683.676972] memory commitment underflow
[ 683.678212] Modules linked in:
[ 683.678219] CPU: 12 PID: 25654 Comm: trinity-c373 Not tainted 3.19.0-rc4-next-20150116-sasha-00054-g4ad498c-dirty #1744
[ 683.678227] ffffffff9c6f7e73 ffff8802c0883a58 ffffffff9b439fb2 0000000000000000
[ 683.678231] ffff8802c0883aa8 ffff8802c0883a98 ffffffff98159e1a ffff8802c0883ae8
[ 683.678236] 0000000000000001 0000000000000000 ffffffffffff76f1 ffff8802a9749000
[ 683.678243] Call Trace:
[ 683.678288] dump_stack (lib/dump_stack.c:52)
[ 683.678297] warn_slowpath_common (kernel/panic.c:447)
[ 683.678302] warn_slowpath_fmt (kernel/panic.c:461)
[ 683.678307] __vm_enough_memory (mm/mmap.c:157 (discriminator 3))
[ 683.678317] cap_vm_enough_memory (security/commoncap.c:958)
[ 683.678323] security_vm_enough_memory_mm (security/security.c:212)
[ 683.678331] shmem_getpage_gfp (mm/shmem.c:1161)
[ 683.678337] shmem_write_begin (mm/shmem.c:1495)
[ 683.678343] generic_perform_write (mm/filemap.c:2491)
[ 683.678447] __generic_file_write_iter (mm/filemap.c:2632)
[ 683.678452] generic_file_write_iter (mm/filemap.c:2659)
[ 683.678458] do_iter_readv_writev (fs/read_write.c:680)
[ 683.678461] do_readv_writev (fs/read_write.c:848)
[ 683.678512] vfs_writev (fs/read_write.c:893)
[ 683.678515] SyS_writev (fs/read_write.c:926 fs/read_write.c:917)
[ 683.678520] tracesys_phase2 (arch/x86/kernel/entry_64.S:529)
Thanks,
Sasha
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WARNING: multiple messages have this Message-ID (diff)
From: Sasha Levin <sasha.levin@oracle.com>
To: Konstantin Khlebnikov <koct9i@gmail.com>,
linux-mm@kvack.org, Andrew Morton <akpm@linux-foundation.org>
Cc: Hugh Dickins <hughd@google.com>,
linux-kernel@vger.kernel.org, Dave Hansen <dave.hansen@intel.com>,
Hugh Dickins <hughd@google.com>
Subject: Re: [PATCH 3/3] mm: catch memory commitment underflow
Date: Sun, 18 Jan 2015 06:34:10 -0500 [thread overview]
Message-ID: <54BB9A32.7080703@oracle.com> (raw)
In-Reply-To: <20140624201614.18273.39034.stgit@zurg>
On 06/24/2014 04:16 PM, Konstantin Khlebnikov wrote:
> This patch prints warning (if CONFIG_DEBUG_VM=y) when
> memory commitment becomes too negative.
>
> Signed-off-by: Konstantin Khlebnikov <koct9i@gmail.com>
Hi Konstantin,
I seem to be hitting this warning when fuzzing on the latest -next kernel:
[ 683.674323] ------------[ cut here ]------------
[ 683.675552] WARNING: CPU: 12 PID: 25654 at mm/mmap.c:157 __vm_enough_memory+0x1b7/0x1d0()
[ 683.676972] memory commitment underflow
[ 683.678212] Modules linked in:
[ 683.678219] CPU: 12 PID: 25654 Comm: trinity-c373 Not tainted 3.19.0-rc4-next-20150116-sasha-00054-g4ad498c-dirty #1744
[ 683.678227] ffffffff9c6f7e73 ffff8802c0883a58 ffffffff9b439fb2 0000000000000000
[ 683.678231] ffff8802c0883aa8 ffff8802c0883a98 ffffffff98159e1a ffff8802c0883ae8
[ 683.678236] 0000000000000001 0000000000000000 ffffffffffff76f1 ffff8802a9749000
[ 683.678243] Call Trace:
[ 683.678288] dump_stack (lib/dump_stack.c:52)
[ 683.678297] warn_slowpath_common (kernel/panic.c:447)
[ 683.678302] warn_slowpath_fmt (kernel/panic.c:461)
[ 683.678307] __vm_enough_memory (mm/mmap.c:157 (discriminator 3))
[ 683.678317] cap_vm_enough_memory (security/commoncap.c:958)
[ 683.678323] security_vm_enough_memory_mm (security/security.c:212)
[ 683.678331] shmem_getpage_gfp (mm/shmem.c:1161)
[ 683.678337] shmem_write_begin (mm/shmem.c:1495)
[ 683.678343] generic_perform_write (mm/filemap.c:2491)
[ 683.678447] __generic_file_write_iter (mm/filemap.c:2632)
[ 683.678452] generic_file_write_iter (mm/filemap.c:2659)
[ 683.678458] do_iter_readv_writev (fs/read_write.c:680)
[ 683.678461] do_readv_writev (fs/read_write.c:848)
[ 683.678512] vfs_writev (fs/read_write.c:893)
[ 683.678515] SyS_writev (fs/read_write.c:926 fs/read_write.c:917)
[ 683.678520] tracesys_phase2 (arch/x86/kernel/entry_64.S:529)
Thanks,
Sasha
next prev parent reply other threads:[~2015-01-18 11:34 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-06-24 20:16 [PATCH 1/3] shmem: fix double uncharge in __shmem_file_setup() Konstantin Khlebnikov
2014-06-24 20:16 ` Konstantin Khlebnikov
2014-06-24 20:16 ` [PATCH 2/3] shmem: update memory reservation on truncate Konstantin Khlebnikov
2014-06-24 20:16 ` Konstantin Khlebnikov
2014-06-26 3:53 ` Hugh Dickins
2014-06-26 3:53 ` Hugh Dickins
2014-06-26 11:27 ` Konstantin Khlebnikov
2014-06-26 11:27 ` Konstantin Khlebnikov
2014-06-24 20:16 ` [PATCH 3/3] mm: catch memory commitment underflow Konstantin Khlebnikov
2014-06-24 20:16 ` Konstantin Khlebnikov
2014-06-25 22:03 ` Andrew Morton
2014-06-25 22:03 ` Andrew Morton
2014-06-26 4:08 ` Konstantin Khlebnikov
2014-06-26 4:08 ` Konstantin Khlebnikov
2014-06-25 22:23 ` Dave Hansen
2014-06-25 22:23 ` Dave Hansen
2015-01-18 11:34 ` Sasha Levin [this message]
2015-01-18 11:34 ` Sasha Levin
2015-01-18 18:36 ` Konstantin Khlebnikov
2015-01-18 18:36 ` Konstantin Khlebnikov
2015-04-25 2:15 ` Sasha Levin
2015-04-25 2:15 ` Sasha Levin
2015-06-07 14:29 ` Sasha Levin
2015-06-07 14:29 ` Sasha Levin
2014-06-26 3:44 ` [PATCH 1/3] shmem: fix double uncharge in __shmem_file_setup() Hugh Dickins
2014-06-26 3:44 ` Hugh Dickins
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