lkml.org 
[lkml]   [2010]   [Jun]   [30]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH 1/2] block: fix leaks associated with discard request payload
On 06/30/2010 11:42 AM, Christoph Hellwig wrote:
> On Wed, Jun 30, 2010 at 11:32:43AM +0300, Boaz Harrosh wrote:
>> May I ask a silly question? Why the dynamic allocation?
>>
>> Why not have a const-static single global page at the block-layer somewhere
>> that will be used for all discard-type operations and be done with it once and
>> for all. A single page can be used for any size bio , any number of concurrent
>> discards, any ZERO needed operation. It can also be used by other operations
>> like padding and others. In fact isn't there one for the libsata padding?
>
> for UNMAP we need to write into the payload. And for ATA TRIM we need
> to write into the WRITE SAME payload.

OK, Thanks, I see. Is it one of these operations, (like we have in OSD) where
the CDB information spills into the payload? like the scatter-gather and extent
lists and such. Do we actually use a WRITE_SAME which is not zero? for what use?

> That's another layering violation
> for those looking for them, btw..
>

Agreed


\
 
 \ /
  Last update: 2010-06-30 12:27    [W:0.306 / U:0.540 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site