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Message-ID: <20120217192825.GE2707@elf.ucw.cz> Date: Fri, 17 Feb 2012 20:28:25 +0100 From: Pavel Machek <pavel@....cz> To: Greg KH <gregkh@...uxfoundation.org> Cc: Egmont Koblinger <egmont@...il.com>, linux-kernel@...r.kernel.org Subject: Re: PROBLEM: Data corruption when pasting large data to terminal Hi! > > Sorry, I didn't emphasize the point that makes me suspect it's a kernel issue: > > > > - strace reveals that the terminal emulator writes the correct data > > into /dev/ptmx, and the kernel reports no short writes(!), all the > > write(..., ..., 68) calls actually return 68 (the length of the > > example file's lines incl. newline; I'm naively assuming I can trust > > strace here.) > > - strace reveals that the receiving application (bash) doesn't receive > > all the data from /dev/pts/N. > > - so: the data gets lost after writing to /dev/ptmx, but before > > reading it out from /dev/pts/N. > > Which it will, if the reader doesn't read fast enough, right? Is the > data somewhere guaranteed to never "overrun" the buffer? If so, how do > we handle not just running out of memory? Start blocking the writer? Pavel -- (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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