shared memory

QNX Newsgroups (Archives) comp.os.qnx
1

Hi Everybody,

Do any one has any idea what can cause the call to shmctl(…, SHMCTL_PHYS,
…) to fail?

Any help is greatly appreciated.

Thx inadvance,

Mankan Srinivas

2

Sure your request for physically contiguous memory cannot be filled.
Permissions, availability or hardware limitations all come into play.

-Adam
Mankan <smankan@nospam.ueidaq.com> wrote in message
news:b1oet6$svq$1@inn.qnx.com…

Hi Everybody,

Do any one has any idea what can cause the call to shmctl(…,
SHMCTL_PHYS,
…) to fail?

Any help is greatly appreciated.

Thx inadvance,

Mankan Srinivas

3

Mankan <smankan@nospam.ueidaq.com> wrote:

Hi Everybody,

Do any one has any idea what can cause the call to shmctl(…, SHMCTL_PHYS,
…) to fail?

What did it return?

What was errno set to after it failed?

Were you running as root? (Superuser, uid = 0 )? You need to be root to
deal with physical memory generally.

-David

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