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staging: zcache: fix account foregin counters against zero-filled pages

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zero-filled pages won't be compressed and sent to remote system. Monitor
the number ephemeral and persistent pages that Ramster has sent make no
sense. This patch skip account foregin counters against zero-filled pages.

Signed-off-by: Wanpeng Li <liwanp@linux.vnet.ibm.com>
Acked-by: Dan Magenheimer <dan.magenheimer@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Wanpeng Li 2013-04-10 08:25:51 +08:00 • committed by Greg Kroah-Hartman
parent bc38967837
commit 55345fb9ff
1 changed files with 4 additions and 4 deletions
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8
drivers/staging/zcache/zcache-main.c
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@ -415,7 +415,7 @@ static void *zcache_pampd_eph_create(char *data, size_t size, bool raw,
got_pampd:
inc_zcache_eph_zbytes(clen);
inc_zcache_eph_zpages();
if (ramster_enabled && raw)
if (ramster_enabled && raw && !zero_filled)
ramster_count_foreign_pages(true, 1);
if (zero_filled)
pampd = (void *)ZERO_FILLED;
@ -500,7 +500,7 @@ static void *zcache_pampd_pers_create(char *data, size_t size, bool raw,
got_pampd:
inc_zcache_pers_zpages();
inc_zcache_pers_zbytes(clen);
if (ramster_enabled && raw)
if (ramster_enabled && raw && !zero_filled)
ramster_count_foreign_pages(false, 1);
if (zero_filled)
pampd = (void *)ZERO_FILLED;
@ -681,7 +681,7 @@ static int zcache_pampd_get_data_and_free(char *data, size_t *sizep, bool raw,
dec_zcache_pers_zpages(zpages);
dec_zcache_pers_zbytes(zsize);
}
if (!is_local_client(pool->client))
if (!is_local_client(pool->client) && !zero_filled)
ramster_count_foreign_pages(eph, -1);
if (page && !zero_filled)
zcache_free_page(page);
@ -732,7 +732,7 @@ static void zcache_pampd_free(void *pampd, struct tmem_pool *pool,
dec_zcache_pers_zpages(zpages);
dec_zcache_pers_zbytes(zsize);
}
if (!is_local_client(pool->client))
if (!is_local_client(pool->client) && !zero_filled)
ramster_count_foreign_pages(is_ephemeral(pool), -1);
if (page && !zero_filled)
zcache_free_page(page);