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| author | Arjan van de Ven <arjan@infradead.org> | 2006-01-06 09:46:02 +0100 |
|---|---|---|
| committer | Jens Axboe <axboe@suse.de> | 2006-01-06 09:46:02 +0100 |
| commit | 64100099ed22f71cce656c5c2caecf5c9cf255dc (patch) | |
| tree | f6ebf7c94ee2eeb080d25880ffca839ec39ec47e /block/deadline-iosched.c | |
| parent | 80cfd548eed68cf90c5ae9cfcd6b02230cece756 (diff) | |
| download | linux-3.10-64100099ed22f71cce656c5c2caecf5c9cf255dc.tar.gz linux-3.10-64100099ed22f71cce656c5c2caecf5c9cf255dc.tar.bz2 linux-3.10-64100099ed22f71cce656c5c2caecf5c9cf255dc.zip | |
[BLOCK] mark some block/ variables cons
the patch below marks various read-only variables in block/* as const,
so that gcc can optimize the use of them; eg gcc will replace the use by
the value directly now and will even remove the memory usage of these.
Signed-off-by: Arjan van de Ven <arjan@infradead.org>
Signed-off-by: Jens Axboe <axboe@suse.de>
Diffstat (limited to 'block/deadline-iosched.c')
| -rw-r--r-- | block/deadline-iosched.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/block/deadline-iosched.c b/block/deadline-iosched.c index 9cbec09e841..27e494b1bf9 100644 --- a/block/deadline-iosched.c +++ b/block/deadline-iosched.c @@ -19,10 +19,10 @@ /* * See Documentation/block/deadline-iosched.txt */ -static int read_expire = HZ / 2; /* max time before a read is submitted. */ -static int write_expire = 5 * HZ; /* ditto for writes, these limits are SOFT! */ -static int writes_starved = 2; /* max times reads can starve a write */ -static int fifo_batch = 16; /* # of sequential requests treated as one +static const int read_expire = HZ / 2; /* max time before a read is submitted. */ +static const int write_expire = 5 * HZ; /* ditto for writes, these limits are SOFT! */ +static const int writes_starved = 2; /* max times reads can starve a write */ +static const int fifo_batch = 16; /* # of sequential requests treated as one by the above parameters. For throughput. */ static const int deadline_hash_shift = 5; |