From: Mike Frysinger <vapier.adi@gmail.com>
To: David Howells <dhowells@redhat.com>
Cc: lethal@linux-sh.org, jie.zhang@analog.com, stefani@seibold.net,
gerg@snapgear.com, uclinux-dev@uclinux.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH 2/7] NOMMU: Provide per-task stack usage through /proc for NOMMU
Date: Mon, 14 Dec 2009 18:33:04 -0500 [thread overview]
Message-ID: <8bd0f97a0912141533wc59a685r77078d60fec77f9b@mail.gmail.com> (raw)
In-Reply-To: <20091210135801.6325.15166.stgit@warthog.procyon.org.uk>
On Thu, Dec 10, 2009 at 08:58, David Howells wrote:
> Make it possible to get the per-task stack usage through /proc on a NOMMU
> system. The MMU-mode routine can't be used because walk_page_range() doesn't
> work on NOMMU.
>
> It can be tested to show the stack usages of non-kernel-thread processes:
>
> # grep "Stack usage:" /proc/*/status | grep -v "0 kB"
> /proc/1/status:Stack usage: 2 kB
> /proc/57/status:Stack usage: 3 kB
> /proc/58/status:Stack usage: 1 kB
> /proc/59/status:Stack usage: 3 kB
> /proc/60/status:Stack usage: 5 kB
> /proc/self/status:Stack usage: 1 kB
>
> I've only tested it with ELF-FDPIC, though it should work with FLAT too.
both seem to work for me. a simple FLAT shows 1kB while one with a
2kB buffer shows 3kB.
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
-mike
next prev parent reply other threads:[~2009-12-14 23:33 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-12-10 13:57 [PATCH 1/7] security: do not check mmap_min_addr on nommu systems David Howells
2009-12-10 13:58 ` [PATCH 2/7] NOMMU: Provide per-task stack usage through /proc for NOMMU David Howells
2009-12-14 23:33 ` Mike Frysinger [this message]
2009-12-10 13:58 ` [PATCH 3/7] NOMMU: fix malloc performance by adding uninitialized flag David Howells
2009-12-10 13:58 ` [PATCH 4/7] FDPIC: Respect PT_GNU_STACK exec protection markings when creating NOMMU stack David Howells
2009-12-10 13:58 ` [PATCH 5/7] NOMMU: Avoiding duplicate icache flushes of shared maps David Howells
2009-12-14 23:55 ` Mike Frysinger
2009-12-15 0:41 ` [uClinux-dev] " Jamie Lokier
2009-12-15 4:52 ` Mike Frysinger
2009-12-15 10:52 ` David Howells
2009-12-10 13:58 ` [PATCH 6/7] NOMMU: Use copy_*_user_page() in access_process_vm() David Howells
2009-12-14 23:51 ` Mike Frysinger
2009-12-10 13:58 ` [PATCH 7/7] NOMMU: ramfs: Drop unused local var David Howells
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