diff options
| author | Milan Broz <mbroz@redhat.com> | 2008-07-02 09:34:28 +0100 |
|---|---|---|
| committer | Alasdair G Kergon <agk@redhat.com> | 2008-07-02 09:34:28 +0100 |
| commit | c7f1b2044191a82e7f0a1a674751ed582289e2e0 (patch) | |
| tree | c200c19aca2faf22ad5c8636a3a783f8e26ef289 /drivers/md/dm-crypt.c | |
| parent | e1441b9a41c33aa9236008a7cfe49a8e723fb397 (diff) | |
| download | lwn-c7f1b2044191a82e7f0a1a674751ed582289e2e0.tar.gz lwn-c7f1b2044191a82e7f0a1a674751ed582289e2e0.zip | |
dm crypt: use cond_resched
Add cond_resched() to prevent monopolising CPU when processing large bios.
dm-crypt processes encryption of bios in sector units. If the bio request
is big it can spend a long time in the encryption call.
Signed-off-by: Milan Broz <mbroz@redhat.com>
Tested-by: Yan Li <elliot.li.tech@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
Diffstat (limited to 'drivers/md/dm-crypt.c')
| -rw-r--r-- | drivers/md/dm-crypt.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/md/dm-crypt.c b/drivers/md/dm-crypt.c index 835def11419d..ab6a61db63ce 100644 --- a/drivers/md/dm-crypt.c +++ b/drivers/md/dm-crypt.c @@ -432,6 +432,7 @@ static int crypt_convert(struct crypt_config *cc, case 0: atomic_dec(&ctx->pending); ctx->sector++; + cond_resched(); continue; /* error */ |