Feature #11263: [PATCH] ext/socket/ancdata.c (bsock_recvmsg_internal): reduce stack use

• Status: Closed
• Assignee: akr (Akira Tanaka)
• Target version: -

[normalperson (Eric Wong)]

Using 8K stack is probably too much. As reference, ALLOCV falls
back to heap allocation at a mere 1K. Since
bsock_recvmsg_internal is a function which will always allocate
and can trigger GC, it is in our best interest to minimize
stack usage to avoid scanning 8K of stack on GC.

[normalperson (Eric Wong)]

I would also like a way to specify a reusable buffer for this like
recv and recv_nonblock, but it is probably less important.

• Status changed from Open to Closed

Applied in changeset r51003.

---

ext/socket/ancdata.c (bsock_recvmsg_internal): reduce stack use

Using 8K stack is probably too much. As reference, ALLOCV falls
back to heap allocation at a mere 1K. Since
bsock_recvmsg_internal is a function which will always allocate
and can trigger GC, it is in our best interest to minimize
stack usage to avoid scanning 8K of stack on GC.

[ruby-core:69595] [Feature #11263]