Andrey V. Elsukov f9cd8b07a4 Almost each time when loader opens a file, this leads to calling ... disk_open(). Very often this is called several times for one file. This leads to reading partition table metadata for each call. To reduce the number of disk I/O we have a simple block cache, but it is very dumb and more than half of I/O operations related to reading metadata, misses this cache. Introduce new cache layer to resolve this problem. It is independent and doesn't need initialization like bcache, and will work by default for all loaders which use the new DISK API. A successful disk_open() call to each new disk or partition produces new entry in the cache. Even more, when disk was already open, now opening of any nested partitions does not require reading top level partition table. So, if without this cache, partition table metadata was read around 20-50 times during boot, now it reads only once. This affects the booting from GPT and MBR from the UFS.		2012-09-29 16:47:56 +00:00
..
ficl
libstand	MFV: Update zlib to 1.2.7.	2012-06-21 21:47:08 +00:00
test	Bump USERBOOT_VERSION.	2012-08-05 17:04:58 +00:00
userboot	Almost each time when loader opens a file, this leads to calling	2012-09-29 16:47:56 +00:00
Makefile
userboot.h	Bump USERBOOT_VERSION.	2012-08-05 17:04:58 +00:00