memory - Linux not freeing the file buffer when we execute rm or > (redirection) operator -


i have router embedded-linux, kernel version 2.4.22. know old version have deal it. following free command output on box,

[8300002902-3] debug> free

             total         used         free       shared      buffers   mem:       128104       123928         4176            0         2164  swap:            0            0            0 total:       128104       123928         4176

now problem whenever execute commands , redirects output file using > operator buffer size increased 4kb , if remove same file using rm -rf buffer again increase 4kb. due when buffer size reaches @ near 5.3mb of size oom problem occurs can see have 128mb ram available. think kernel not reclaiming buffer space. please tell me can done rid of problem. have researched setting drop_caches value in /proc/sys/vm command not available @ kernel version.

here proc/meminfo dump may can help.

[8300002902-3] debug> cat /proc/meminfo

         total:    used:    free:  shared: buffers:  cached: mem:  131178496 126545920  4632576        0  2211840 54927360 swap:        0        0        0 memtotal:       128104 kb memfree:          4524 kb memshared:           0 kb buffers:          2160 kb cached:          53640 kb swapcached:          0 kb active:          66628 kb inactive:        36692 kb hightotal:           0 kb highfree:            0 kb lowtotal:       128104 kb lowfree:          4524 kb swaptotal:           0 kb swapfree:            0 kb


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