lkml.org 
[lkml]   [2001]   [Feb]   [14]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH] swapin flush cache bug

On Wed, 14 Feb 2001, NIIBE Yutaka wrote:

> Alan Cox wrote:
> > Ok we need to handle that case a bit more intelligently so those flushes dont
> > get into other ports code paths.
>
> Possibly at fs/buffer.c:end_buffer_io_async?
>
> We need to flush the cache when I/O was READ or READA.

Yet another thing (1) on end_buffer_io_async() to handle a case which is
only true for a specific user of it. Since the other special case handling
is for swap IO too, I think a separate IO end operation for swap would be
interesting.

(1) The current one is SetPageDecrAfter handling.

> Is there any way for end_buffer_io_async to distinguish which I/O (READ or WRITE)
> has been done?

Yes. If the buffer_head is uptodated (BH_Uptodate) then its a WRITE,
otherwise its a READ (this is only true before mark_buffer_uptodate() call
inside end_buffer_io_async(), of course).

-
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: 2005-03-22 13:14    [W:0.103 / U:1.040 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site