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Date: Sat, 14 Mar 2009 17:42:53 +0100 From: Markus <M4rkusXXL@....de> To: lkml <linux-kernel@...r.kernel.org> Subject: REGRESSION: 2.6.28.7 => 2.6.29-rc8: pwc mmap always failes with EAGAIN Hello! I just tried the 2.6.29-rc8 and run into a problem. Running motion (a motion detection software for a webcam: http://www.lavrsen.dk/twiki/bin/view/Motion/WebHome) with the pwc driver will give some error message: [1] Error mapping buffer 0 mmap: Resource temporarily unavailable [1] MAP_FAILED: Resource temporarily unavailable Looking in the sources: It opens the video device (/dev/video1 for me) and then tries to mmap with: mmap(NULL, buf.length, PROT_READ | PROT_WRITE, MAP_SHARED, s->fd, buf.m.offset); It returns MAP_FAILED and errno is EAGAIN. >From the manpages of mmap: "EAGAIN The file has been locked, or too much memory has been locked (see setrlimit(2))." The software is not able to gather a picture from the webcam (its a logitech orbit). Everything works with kernel 2.6.28.7 and before. The config is copied from the 2.6.28.7 (except of some new options: "make oldconfig"). Nothing else is changed! (Only the kernel differs.) I dont know how that can be debugged further as the pwc module wasn changed (except of a small api-adjustment). Thanks! Markus PS: Please CC me! -- 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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