On 09/12/13 23:30, Shuah Khan wrote: > Adding ubifs maintainers. > > -- Shuah > > On Mon, Dec 9, 2013 at 1:53 PM, David Mosberger-Tang > <dmosber...@gmail.com> wrote: >> I've had no luck getting any response from the linux-mtd mailing list >> regarding the issue reported below. >> I think it is a very serious issue since it can easily render an >> embedded system unusable. >> >> --david >> >> ---------- Forwarded message ---------- >> From: David Mosberger-Tang <dmosber...@gmail.com> >> Date: Thu, Nov 7, 2013 at 11:44 AM >> Subject: UBIFS recovery taking too long >> To: "linux-...@lists.infradead.org" <linux-...@lists.infradead.org> >> >> >> We recently encountered a strange issue where UBIFS recovery is >> suddenly taking a lot longer than usual (v3.7-based kernel). In our >> case, recovery took about 30 seconds. This caused a serious problem >> because our watchdog timer was set to 15 seconds, effectively >> rendering the devices unbootable. >> >> Does anybody know what triggers this slow recovery mode? Also, how >> can we calculate a worst-case recovery time for a given flash >> chip-size.
Slowness is probably caused by trying to make free space. Was the file system very full? A smaller journal might help. Probably the only way to determine worst-case recovery time is to test it. Worst case conditions are likely to be a full journal and a nearly full file system. Ideally you want to capture a file system image that exhibits the slow behaviour, then you can enable debug messages and see what it is doing. >> >> Thanks, >> >> --david >> -- >> To unsubscribe from this list: send the line "unsubscribe linux-kernel" in >> the body of a message to majord...@vger.kernel.org >> More majordomo info at http://vger.kernel.org/majordomo-info.html >> Please read the FAQ at http://www.tux.org/lkml/ > > -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
