lists.openwall.net | 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 linux-cve-announce PHC | |
Open Source and information security mailing list archives
| ||
|
Date: Wed, 27 Feb 2013 11:05:36 +0530 From: Prashant Batra <prbatra.mail@...il.com> To: Prashant Batra <prbatra.lists@...il.com>, netdev@...r.kernel.org CC: linux-newbie@...r.kernel.org Subject: Re: understanding linux cache and free command Adding netdev for a bigger audience. On Tuesday, February 26, 2013 6:18:48 PM, Prashant Batra wrote: > Hi All, > > I have created few memory cache areas using "kmem_cache_create" and > using it to allocate some memory. > > What I observe after some cache_alloc's and cache_free's is that > /proc/slabinfo entries for my objects are good, meaning the number of > objects go back to 0 after they are freed. > > But linux "free" command shows that some of the objects are cached and > that keeps on increasing. I am not able to understand this behavior. > Is it that kernel keeps the cache objects even after they are freed? > > #cat /proc/slabinfo > my_cache 200 200 4096 1 1 : tunables 24 12 8 > : slabdata 200 200 0 > > It shows 200 allocated objects from "my_cache" > > and > > #free -lm > > total used free shared buffers cached > Mem: 48340 610 47730 0 96 130 > > the cached objects keep on growing. > > After 5 mins in which I am doing some alloc and free- > total used free shared buffers cached > Mem: 48340 616 47723 0 96 137 > > /proc/slabinfo remains the same. > > Any help is appreciated. > > Thanks, > Prashant -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Powered by blists - more mailing lists