lkml.org 
[lkml]   [2008]   [Jun]   [5]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH 3/5] pagemap: Make pagemap_read enforce reading in multiples of 8
On Thu, Jun 5, 2008 at 12:03 PM, Matt Mackall <mpm@selenic.com> wrote:
>
> On Thu, 2008-06-05 at 11:06 -0400, Thomas Tuttle wrote:
>> Since kpagecount and kpageflags require reads in multiples of 8, and
>> it simplifies add_to_pagemap significantly, I added the same
>> requirement to /proc/pid/pagemap.
>
> I'm generally fine with this. Another approach that's perhaps more
> friendly is when someone tries to do a 24-byte read, do a 16-byte read,
> leaving the file pointer aligned. Not sure if that's completely kosher
> though.

This doesn't require that they read exactly 8 bytes, just that they
read some multiple of 8 bytes. (They can read 8, 16, 24, etc..., just
not something like 12.)

--ttuttle


\
 
 \ /
  Last update: 2008-06-05 18:09    [W:0.057 / U:0.388 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site