lkml.org 
[lkml]   [2008]   [Oct]   [7]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH, RFC, v2] shmat: introduce flag SHM_MAP_HINT
On Tue, Oct 07, 2008 at 09:57:50AM +0300, Kirill A. Shutemov wrote:
> It allows interpret attach address as a hint, not as exact address.

Please expand the description a bit. Rationale. etc.

> @@ -55,6 +55,7 @@ struct shmid_ds {
> #define SHM_RND 020000 /* round attach address to SHMLBA boundary */
> #define SHM_REMAP 040000 /* take-over region on attach */
> #define SHM_EXEC 0100000 /* execution access */
> +#define SHM_MAP_HINT 0200000 /* interpret attach address as a hint */

search hint

> @@ -892,7 +892,7 @@ long do_shmat(int shmid, char __user *shmaddr, int shmflg, ulong *raddr)
> sfd->vm_ops = NULL;
>
> down_write(&current->mm->mmap_sem);
> - if (addr && !(shmflg & SHM_REMAP)) {
> + if (addr && !(shmflg & (SHM_REMAP|SHM_MAP_HINT))) {

I think you were right earlier that it can be just deleted, so why don't
you just do that?

-Andi

--
ak@linux.intel.com


\
 
 \ /
  Last update: 2008-10-07 10:17    [W:0.098 / U:0.076 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site