lists  /  announce  owl-users  owl-dev  john-users  john-dev  passwdqc-users  yescrypt  popa3d-users  /  oss-security  kernel-hardening  musl  sabotage  tlsify  passwords  /  crypt-dev  xvendor  /  Bugtraq  Full-Disclosure  linux-kernel  linux-netdev  linux-ext4  linux-hardening  PHC 
Open Source and information security mailing list archives
Hash Suite for Android: free password hash cracker in your pocket
[<prev] [next>] [day] [month] [year] [list]
Date:	Mon, 26 Oct 2009 22:49:30 +0530
From:	"Leonidas ." <>
To:	linux-kernel <>
Subject: Difference between atomic operations and memory barriers

Trying to understand difference between atomic ops and memory barriers.

I was thinking all atomic operations must be using barrier internally,
but I read
somewhere that only some of them use barriers. Sorry for being vague here.

Operations before call to smp_mb() will not be re-ordered and all cpus will see
consistent value after the variable is updated.

void * ptr = (void *) str;

Will this not atomically update ptr? Ptr will be seen by all cpu's in
same state
after it has been assigned str, right?

To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to
More majordomo info at
Please read the FAQ at

Powered by blists - more mailing lists