On Mon, Oct 03, 2011 at 05:16:15PM +0530, Amit Sahrawat wrote: > While mounting UDF media, when the primary AVDP is not found at block > 256, UDF code tries to read-in the alternate AVDP. > In the function udf_find_anchor, udf_scan_anchors is called 3 times, > where each call to udf_scan_anchors read 12 blocks. > In case there is no alternate AVDP stored, a total of 36 blocks are > read before mount fails - causing time delay for Mount Failure. > > 1) After first call to udf_scan_anchors and before the second call > there is varconv conversion, for the older drivers, which skips 7 > blocks after every 32 blocks. What are these older drivers? Do we > still require this code? I'm not sure what "drivers" are you talking about, but "UDF_SET_FLAG(sb, UDF_FLAG_VARCONV)" does not convert anything - it just sets superblock flag. > 2) After varconv conversion, why is there a third call to > udf_scan_anchors? In the 1st call and 3rd call to udf_scan_anchors, > exactly same blocks are read, so this 3rd call seems to be redundant. Because UDF_FLAG_VARCONV changes behavior of udf_scan_anchors. Marcin -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
