[<prev] [next>] [thread-next>] [day] [month] [year] [list]
Message-Id: <200709141135.35239.vda.linux@googlemail.com>
Date: Fri, 14 Sep 2007 11:35:34 +0100
From: Denys Vlasenko <vda.linux@...glemail.com>
To: tapio.laxstrom@...ime.fi
Cc: linux-kernel@...r.kernel.org
Subject: drivers/usb/misc/emi*.c have the biggest data objects in the whole tree
Hi Tapio,
You are the author of these files. Are you still maintaining them?
If not, do you know who is the current maintainer?
These two object files hold the biggest data objects in the whole Linux kernel
after lockdep:
text data bss dec hex filename
1258 160516 0 161774 277ee ./drivers/usb/misc/emi26.o
1504 209296 0 210800 33770 ./drivers/usb/misc/emi62.o
Basically, these are big arrays of the following structures:
typedef struct _INTEL_HEX_RECORD
{
__u32 length;
__u32 address;
__u32 type;
__u8 data[MAX_INTEL_HEX_RECORD_LENGTH];
} INTEL_HEX_RECORD;
I suggest the following optimizations:
Change structure to
typedef struct _INTEL_HEX_RECORD
{
__u8 type;
__u8 length;
__u16 address;
__u8 data[MAX_INTEL_HEX_RECORD_LENGTH];
} INTEL_HEX_RECORD __attribute__((__packed__));
Store gzip compressed tables and unpack them at load time.
Declare them const and __initdata.
I can do it if there is no active maintainer.
--
vda
-
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/
Powered by blists - more mailing lists