Hi наб! On Sun, Mar 17, 2024 at 12:01:43PM +0100, наб wrote: [...] > Just s/process/& and its waited-for children/ but re-broken per review. > > Signed-off-by: Ahelenia Ziemiańska <nabijaczleweli@xxxxxxxxxxxxxxxxxx> Patch applied. (And /^Just/d ) Thanks! Have a lovely day! Alex > --- > man5/proc_pid_io.5 | 27 ++++++++++++++++++--------- > 1 file changed, 18 insertions(+), 9 deletions(-) > > diff --git a/man5/proc_pid_io.5 b/man5/proc_pid_io.5 > index d6eaebf5d..dc75a91de 100644 > --- a/man5/proc_pid_io.5 > +++ b/man5/proc_pid_io.5 > @@ -11,7 +11,9 @@ .SH DESCRIPTION > .TP > .IR /proc/ pid /io " (since Linux 2.6.20)" > .\" commit 7c3ab7381e79dfc7db14a67c6f4f3285664e1ec2 > -This file contains I/O statistics for the process, for example: > +This file contains I/O statistics > +for the process and its waited-for children, > +for example: > .IP > .in +4n > .EX > @@ -30,7 +32,9 @@ .SH DESCRIPTION > .RS > .TP > .IR rchar ": characters read" > -The number of bytes which this task has caused to be read from storage. > +The number of bytes > +which this task and its waited-for children > +have caused to be read from storage. > This is simply the sum of bytes which this process passed to > .BR read (2) > and similar system calls. > @@ -40,8 +44,9 @@ .SH DESCRIPTION > pagecache). > .TP > .IR wchar ": characters written" > -The number of bytes which this task has caused, or shall cause to be written > -to disk. > +The number of bytes > +which this task and its waited-for children > +have caused, or shall cause to be written to disk. > Similar caveats apply here as with > .IR rchar . > .TP > @@ -60,20 +65,24 @@ .SH DESCRIPTION > .BR pwrite (2). > .TP > .IR read_bytes ": bytes read" > -Attempt to count the number of bytes which this process really did cause to > -be fetched from the storage layer. > +Attempt to count the number of bytes > +which this process and its waited-for children > +really did cause to be fetched from the storage layer. > This is accurate for block-backed filesystems. > .TP > .IR write_bytes ": bytes written" > -Attempt to count the number of bytes which this process caused to be sent to > -the storage layer. > +Attempt to count the number of bytes > +which this process and its waited-for children > +caused to be sent to the storage layer. > .TP > .IR cancelled_write_bytes : > The big inaccuracy here is truncate. > If a process writes 1 MB to a file and then deletes the file, > it will in fact perform no writeout. > But it will have been accounted as having caused 1 MB of write. > -In other words: this field represents the number of bytes which this process > +In other words: > +this field represents the number of bytes > +which this process and its waited-for children > caused to not happen, by truncating pagecache. > A task can cause "negative" I/O too. > If this task truncates some dirty pagecache, > -- > 2.39.2 > -- <https://www.alejandro-colomar.es/>
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