Ah, that's it. Increased the limit on the mount and it works fine now.
Thanks!
- Alex.
On 01/06/18 14:05, Michal Hocko wrote:
On Fri 01-06-18 13:26:59, Alex Richman wrote:
I am using a shm MAP_SHARED, along these lines:
shm_fd = shm_open(handle, (O_RDWR | O_CREAT), (S_IRWXU | S_IRWXG |
S_IRWXO));
ftruncate(shm_fd, channel->sled_size)
channel->sled = mmap(NULL, channel->sled_size, (PROT_READ | PROT_WRITE),
(MAP_SHARED | MAP_NORESERVE), shm_fd, 0);
mlock(channel->sled, channel->sled_size) /* Fails with ENOMEM. */
But shmmax is unlimited on my box:
# sysctl -a | grep shm
kernel.shm_next_id = -1
kernel.shm_rmid_forced = 0
kernel.shmall = 18446744073692774399
kernel.shmmax = 18446744073692774399
kernel.shmmni = 4096
Any ideas?
shm_open uses tmpfs/shmem under the cover and that has the internal
limit as explained above.
--
Alex Richman
[email protected]
Engineering
GB Labs
2 Orpheus House,
Calleva park,
Reading
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Tel:+44 (0)118 455 5000
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