As a note - from taking a look at some of the linux kernel discussions, it looks like kmalloc can be used for up to 32*pagesize bytes (128k)... any idea why our threshold is set to just 1 page?
-- Nathan ------------------------------------------------------------ Nathan Neulinger EMail: [EMAIL PROTECTED] University of Missouri - Rolla Phone: (573) 341-6679 UMR Information Technology Fax: (573) 341-4216 > -----Original Message----- > From: Neulinger, Nathan > Sent: Monday, April 12, 2004 11:02 AM > Cc: '[EMAIL PROTECTED]' > Subject: RE: [OpenAFS-devel] How can the mem cache possibly > not be able to allocate memory? > > AFS osi_alloc appears to be thresholding at MAX_KMALLOC_SIZE. > If <=, it uses kmalloc, otherwise vmalloc. MAX_KMALLOC_SIZE > is set to PAGE_SIZE. > > -- Nathan > > ------------------------------------------------------------ > Nathan Neulinger EMail: [EMAIL PROTECTED] > University of Missouri - Rolla Phone: (573) 341-6679 > UMR Information Technology Fax: (573) 341-4216 > > > > -----Original Message----- > > From: chas williams (contractor) [mailto:[EMAIL PROTECTED] > > Sent: Wednesday, April 07, 2004 10:01 PM > > To: Neulinger, Nathan > > Cc: [EMAIL PROTECTED] > > Subject: Re: [OpenAFS-devel] How can the mem cache possibly > > not be able to allocate memory? > > > > In message <[EMAIL PROTECTED]>,Nathan Neulinger writes: > > >Apr 7 13:27:51 nic1 kernel: Memory: 4008596k/4194304k > > available (2244k > > >kernel code, 53668k reserved, 1432k data, 168k init, > > 3145152k highmem) > > > > > >That just plain doesn't make any sense... I tried to give it a 75MB > > >memcache... Is there something with how afs is trying to > > allocate kernel > > >memory that would limit what it could use? > > > > well the linux kernel could be placing a limit on memory. i > > would have > > to guess that afs_osi_Alloc(memCacheBlkSize) is going to > > using kmalloc() > > instead of vmalloc(). kmalloc() gets its buffer from various pools > > viewable from /proc/slabinfo (in particular the size-NNNN > pools). it > > seems like you might be hitting a limit on the number of buffers. > > > > perhaps memcache should be implemented to have it own kmem_cache. > > > > _______________________________________________ OpenAFS-devel mailing list [EMAIL PROTECTED] https://lists.openafs.org/mailman/listinfo/openafs-devel
