On Thu, Aug 1, 2013 at 4:36 AM, Rich Felker wrote:
> On Thu, Aug 01, 2013 at 01:29:51AM -0700, Christoph Hellwig wrote:
>> Btw, FreeBSD has an extension to shm_open to create unnamed but fd
>> passable segments. From their man page:
>>
>> As a FreeBSD extension, the constant SHM_ANON may be u
On Thu, Aug 01, 2013 at 04:36:08AM -0400, Rich Felker wrote:
> I'm not sure what the purpose is. shm_open with a long random filename
> and O_EXCL|O_CREAT, followed immediately by shm_unlink, is just as
> good except in the case where you have a malicious user killing the
> process in between these
On Thu, Aug 01, 2013 at 01:29:51AM -0700, Christoph Hellwig wrote:
> Btw, FreeBSD has an extension to shm_open to create unnamed but fd
> passable segments. From their man page:
>
> As a FreeBSD extension, the constant SHM_ANON may be used for the path
> argument to shm_open(). In this c
Btw, FreeBSD has an extension to shm_open to create unnamed but fd
passable segments. From their man page:
As a FreeBSD extension, the constant SHM_ANON may be used for the path
argument to shm_open(). In this case, an anonymous, unnamed shared
memory object is created. Since the ob
Hi Christoph,
On 06/24/2013 07:48 PM, Christoph Hellwig wrote:
On Sat, Jun 22, 2013 at 12:47:29PM -0700, Alex Elsayed wrote:
Couldn't this be done by having a root-only tmpfs, and having a userspace
component that creates per-app directories with restrictive permissions on
startup/app install? T
Hi Colin,
On 06/22/2013 07:42 AM, Colin Cross wrote:
One of the features of ashmem (drivers/staging/android/ashmem.c) that
hasn't gotten much discussion about moving out of staging is named
anonymous memory.
In Android, ashmem is used for three different features, and most
users of it only care
On Mon, Jun 24, 2013 at 10:26 AM, Colin Cross wrote:
> On Mon, Jun 24, 2013 at 4:48 AM, Christoph Hellwig wrote:
>> On Sat, Jun 22, 2013 at 12:47:29PM -0700, Alex Elsayed wrote:
>>> Couldn't this be done by having a root-only tmpfs, and having a userspace
>>> component that creates per-app direct
On Mon, Jun 24, 2013 at 4:48 AM, Christoph Hellwig wrote:
> On Sat, Jun 22, 2013 at 12:47:29PM -0700, Alex Elsayed wrote:
>> Couldn't this be done by having a root-only tmpfs, and having a userspace
>> component that creates per-app directories with restrictive permissions on
>> startup/app instal
On Sat, Jun 22, 2013 at 12:47:29PM -0700, Alex Elsayed wrote:
> Couldn't this be done by having a root-only tmpfs, and having a userspace
> component that creates per-app directories with restrictive permissions on
> startup/app install? Then each app creates files in its own directory, and
> ca
On Sat, Jun 22, 2013 at 3:31 AM, Christoph Hellwig wrote:
> On Fri, Jun 21, 2013 at 04:42:41PM -0700, Colin Cross wrote:
>> ranges, which John Stultz has been implementing. The second is
>> anonymous shareable memory without having a world-writable tmpfs that
>> untrusted apps could fill with fil
On Fri, Jun 21, 2013 at 04:42:41PM -0700, Colin Cross wrote:
> ranges, which John Stultz has been implementing. The second is
> anonymous shareable memory without having a world-writable tmpfs that
> untrusted apps could fill with files.
I still haven't seen any explanation of what ashmem buys ov
On Fri, Jun 21, 2013 at 10:12 PM, Kyungmin Park wrote:
> On Sat, Jun 22, 2013 at 8:42 AM, Colin Cross wrote:
>> One of the features of ashmem (drivers/staging/android/ashmem.c) that
>> hasn't gotten much discussion about moving out of staging is named
>> anonymous memory.
>>
>> In Android, ashmem
On Sat, Jun 22, 2013 at 8:42 AM, Colin Cross wrote:
> One of the features of ashmem (drivers/staging/android/ashmem.c) that
> hasn't gotten much discussion about moving out of staging is named
> anonymous memory.
>
> In Android, ashmem is used for three different features, and most
> users of it o
One of the features of ashmem (drivers/staging/android/ashmem.c) that
hasn't gotten much discussion about moving out of staging is named
anonymous memory.
In Android, ashmem is used for three different features, and most
users of it only care about one feature at a time. One is volatile
ranges, w
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