All of lore.kernel.org
 help / color / mirror / Atom feed
From: ludovic.desroches@atmel.com (Ludovic Desroches)
To: linux-arm-kernel@lists.infradead.org
Subject: atmel-mci causes kernel panic when CONFIG_DEBUG_VM is set
Date: Thu, 19 May 2011 09:53:12 +0200	[thread overview]
Message-ID: <4DD4CC68.80408@atmel.com> (raw)

Hello,

There is a bug with the atmel-mci driver when the debug feature 
CONFIG_DEBUG_VM is set.

Into the atmci_read_data_pio function we use flush_dcache_page (do we 
really need it?) which call the page_mapping function where we can find 
VM_BUG_ON(PageSlab(Page)). Then a kernel panic happens.

I don't understand the purpose of the VM_BUG_ON(PageSlab(Page)) (the 
page comes from a scatter list). How could I correct this problem?

Thanks for your help

Regards,

Ludovic

             reply	other threads:[~2011-05-19  7:53 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2011-05-19  7:53 Ludovic Desroches [this message]
2011-05-19  8:04 ` atmel-mci causes kernel panic when CONFIG_DEBUG_VM is set Barry Song
2011-05-19  9:24   ` Ludovic Desroches
2011-05-19 12:17     ` Ludovic Desroches
2011-05-19 15:16       ` Ludovic Desroches
2011-05-19 15:16         ` Ludovic Desroches
2011-05-19 18:25 ` Uwe Kleine-König
2011-05-19 18:25   ` Uwe Kleine-König
2011-05-19 18:25   ` Uwe Kleine-König
2011-05-19 18:25   ` Uwe Kleine-König

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=4DD4CC68.80408@atmel.com \
    --to=ludovic.desroches@atmel.com \
    --cc=linux-arm-kernel@lists.infradead.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.