lkml.org 
[lkml]   [2008]   [Aug]   [18]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [patch] mm: xip/ext2 fix block allocation race
Nick Piggin wrote:
> XIP can call into get_xip_mem concurrently with the same file,offset with
> create=1. This usually maps down to get_block, which expects the page lock
> to prevent such a situation. This causes ext2 to explode for one reason or
> another.
>
> Serialise those calls for the moment. For common usages today, I suspect
> get_xip_mem rarely is called to create new blocks. In future as XIP
> technologies evolve we might need to look at which operations require
> scalability, and rework the locking to suit.
>
> Signed-off-by: Nick Piggin <npiggin@suse.de>
Acked-by: Carsten Otte <cotte@de.ibm.com>


\
 
 \ /
  Last update: 2008-08-18 12:53    [W:0.040 / U:5.212 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site