Re: [PATCH] [2.5] Non-blocking write can block

Linus Torvalds (torvalds@transmeta.com)
Wed, 4 Jun 2003 12:56:01 -0700 (PDT)


On Wed, 4 Jun 2003, P. Benie wrote:
>
> The problem isn't to do with large writes. It's to do with any sequence of
> writes that fills up the receive buffer, which is only 4K for N_TTY. If
> the receiving program is suspended, the buffer will fill sooner or later.

Well, even then we could just drop the "write_atomic" lock.

The thing is, I don't know what the tty atomicity guarantees are. I know
what they are for pipes (quite reasonable), but tty's?

Linus

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