lkml.org 
[lkml]   [2005]   [Oct]   [19]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: Is ext3 flush data to disk when files are closed?
Badari Pulavarty <pbadari@gmail.com> wrote:
>
> On Wed, 2005-10-19 at 11:31 -0400, Xin Zhao wrote:
> > As far as I know, if an application modifies a file on an ext3 file
> > ssytem, it actually change the page cache, and the dirty pages will be
> > flushed to disk by kupdate periodically.
> >
> > My question is: if a file is to be closed, but some of its data pages
> > are marked as dirty, will system block on close() and wait for dirty
> > pages being flushed to disk? If so, it seems to decrease performance
> > significantly if a lot of updates on many small files are involved.
> >
> > Can someone point me to the right place to check how it works? Thanks!
>
> On the last close() of the file, it should be flushed through ..
>
> iput_final() -> generic_drop_inode() -> write_inode_now()
> -> __writeback_single_inode() -> __sync_single_inode()
> -> do_writepages()

The dcache's reference to the inode will prevent this from happening at
close() time.

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2005-10-19 22:03    [from the cache]
©2003-2011 Jasper Spaans