On 11.05.22 20:51, Johannes Weiner wrote: > On Wed, May 11, 2022 at 07:11:06PM +0200, David Hildenbrand wrote: >> On 10.05.22 17:28, Johannes Weiner wrote: >>> Add new entries. Minor corrections and cleanups. >>> >>> Signed-off-by: Johannes Weiner <hannes@xxxxxxxxxxx> >>> --- >>> Documentation/filesystems/proc.rst | 155 ++++++++++++++++++----------- >>> 1 file changed, 99 insertions(+), 56 deletions(-) >>> >>> diff --git a/Documentation/filesystems/proc.rst b/Documentation/filesystems/proc.rst >>> index 061744c436d9..736ed384750c 100644 >>> --- a/Documentation/filesystems/proc.rst >>> +++ b/Documentation/filesystems/proc.rst >>> @@ -942,56 +942,71 @@ can be substantial. In many cases there are other means to find out >>> additional memory using subsystem specific interfaces, for instance >>> /proc/net/sockstat for TCP memory allocations. >>> >>> -The following is from a 16GB PIII, which has highmem enabled. >>> -You may not have all of these fields. >>> +Example output. You may not have all of these fields. >>> >>> :: >>> >>> > cat /proc/meminfo >>> >>> - MemTotal: 16344972 kB >>> - MemFree: 13634064 kB >>> - MemAvailable: 14836172 kB >>> - Buffers: 3656 kB >>> - Cached: 1195708 kB >>> - SwapCached: 0 kB >>> - Active: 891636 kB >>> - Inactive: 1077224 kB >>> - HighTotal: 15597528 kB >>> - HighFree: 13629632 kB >>> - LowTotal: 747444 kB >>> - LowFree: 4432 kB >>> - SwapTotal: 0 kB >>> - SwapFree: 0 kB >>> - Dirty: 968 kB >>> - Writeback: 0 kB >>> - AnonPages: 861800 kB >>> - Mapped: 280372 kB >>> - Shmem: 644 kB >>> - KReclaimable: 168048 kB >>> - Slab: 284364 kB >>> - SReclaimable: 159856 kB >>> - SUnreclaim: 124508 kB >>> - PageTables: 24448 kB >>> - NFS_Unstable: 0 kB >>> - Bounce: 0 kB >>> - WritebackTmp: 0 kB >>> - CommitLimit: 7669796 kB >>> - Committed_AS: 100056 kB >>> - VmallocTotal: 112216 kB >>> - VmallocUsed: 428 kB >>> - VmallocChunk: 111088 kB >>> - Percpu: 62080 kB >>> - HardwareCorrupted: 0 kB >>> - AnonHugePages: 49152 kB >>> - ShmemHugePages: 0 kB >>> - ShmemPmdMapped: 0 kB >>> + MemTotal: 32858820 kB >>> + MemFree: 21001236 kB >>> + MemAvailable: 27214312 kB >>> + Buffers: 581092 kB >>> + Cached: 5587612 kB >>> + SwapCached: 0 kB >>> + Active: 3237152 kB >>> + Inactive: 7586256 kB >>> + Active(anon): 94064 kB >>> + Inactive(anon): 4570616 kB >>> + Active(file): 3143088 kB >>> + Inactive(file): 3015640 kB >>> + Unevictable: 0 kB >>> + Mlocked: 0 kB >>> + SwapTotal: 0 kB >>> + SwapFree: 0 kB >>> + Dirty: 12 kB >>> + Writeback: 0 kB >>> + AnonPages: 4654780 kB >>> + Mapped: 266244 kB >>> + Shmem: 9976 kB >>> + KReclaimable: 517708 kB >>> + Slab: 660044 kB >>> + SReclaimable: 517708 kB >>> + SUnreclaim: 142336 kB >>> + KernelStack: 11168 kB >>> + PageTables: 20540 kB >>> + NFS_Unstable: 0 kB >>> + Bounce: 0 kB >>> + WritebackTmp: 0 kB >>> + CommitLimit: 16429408 kB >>> + Committed_AS: 7715148 kB >>> + VmallocTotal: 34359738367 kB >>> + VmallocUsed: 40444 kB >>> + VmallocChunk: 0 kB >>> + Percpu: 29312 kB >>> + HardwareCorrupted: 0 kB >>> + AnonHugePages: 4149248 kB >>> + ShmemHugePages: 0 kB >>> + ShmemPmdMapped: 0 kB >>> + FileHugePages: 0 kB >>> + FilePmdMapped: 0 kB >>> + CmaTotal: 0 kB >>> + CmaFree: 0 kB >>> + HugePages_Total: 0 >>> + HugePages_Free: 0 >>> + HugePages_Rsvd: 0 >>> + HugePages_Surp: 0 >>> + Hugepagesize: 2048 kB >>> + Hugetlb: 0 kB >>> + DirectMap4k: 401152 kB >>> + DirectMap2M: 10008576 kB >>> + DirectMap1G: 24117248 kB >>> >>> MemTotal >>> Total usable RAM (i.e. physical RAM minus a few reserved >>> bits and the kernel binary code) >>> MemFree >>> - The sum of LowFree+HighFree >>> + Total free RAM. On highmem systems, the sum of LowFree+HighFree >>> MemAvailable >>> An estimate of how much memory is available for starting new >>> applications, without swapping. Calculated from MemFree, >>> @@ -1005,8 +1020,9 @@ Buffers >>> Relatively temporary storage for raw disk blocks >>> shouldn't get tremendously large (20MB or so) >>> Cached >>> - in-memory cache for files read from the disk (the >>> - pagecache). Doesn't include SwapCached >>> + In-memory cache for files read from the disk (the >>> + pagecache) as well as tmpfs & shmem. >>> + Doesn't include SwapCached. >>> SwapCached >>> Memory that once was swapped out, is swapped back in but >>> still also is in the swapfile (if memory is needed it >>> @@ -1018,6 +1034,11 @@ Active >>> Inactive >>> Memory which has been less recently used. It is more >>> eligible to be reclaimed for other purposes >>> +Unevictable >>> + Memory that cannot be reclaimed, such as mlocked pages, >>> + ramfs backing pages, secret memfd pages etc. >> >> >> A little imprecise, because this only includes memory to be mapped into >> user space. For example, all kernel allocations are unevictable but not >> accounted here. > > True. How about the below? Sounds good, thanks! -- Thanks, David / dhildenb
