Code increase by 64 KB with addition of LOG_WRN

[smfelsher]

I noticed this code (FLASH/drom) increase after I started implementing a "reboot" manager. I added a function to stop the HTTP server and put an error check after the http_server_stop(). Inside the check, I added a LOG_WRN(). My code increased by 65,560 bytes. Here is the before-and-after, where I am simply commenting/uncommenting the LOG_WRN() call.

Before

Memory region         Used Size  Region Size  %age Used
     mcuboot_hdr:          32 B         32 B    100.00%
        metadata:          80 B         96 B     83.33%
           FLASH:      671172 B    4194176 B     16.00%
     iram0_0_seg:       58652 B       329 KB     17.41%
     dram0_0_seg:      201976 B       313 KB     63.02%
     irom0_0_seg:      458734 B        32 MB      1.37%
     drom0_0_seg:      540228 B        32 MB      1.61%
    ext_dram_seg:     1669200 B         2 MB     79.59%
    ext_iram_seg:          0 GB         2 MB      0.00%
    rtc_iram_seg:          0 GB         8 KB      0.00%
    rtc_slow_seg:          0 GB         8 KB      0.00%
        IDT_LIST:          0 GB         8 KB      0.00%

After

Memory region         Used Size  Region Size  %age Used
     mcuboot_hdr:          32 B         32 B    100.00%
        metadata:          80 B         96 B     83.33%
           FLASH:      736732 B    4194176 B     17.57%
     iram0_0_seg:       58652 B       329 KB     17.41%
     dram0_0_seg:      201976 B       313 KB     63.02%
     irom0_0_seg:      458786 B        32 MB      1.37%
     drom0_0_seg:      605788 B        32 MB      1.81%
    ext_dram_seg:     1734736 B         2 MB     82.72%
    ext_iram_seg:          0 GB         2 MB      0.00%
    rtc_iram_seg:          0 GB         8 KB      0.00%
    rtc_slow_seg:          0 GB         8 KB      0.00%
        IDT_LIST:          0 GB         8 KB      0.00%

My hardware is an ESP32-S3. Specifically, I'm developing on a ThingPulse ESP32-S3 Pendrive. The weact_esp32s3_mini_procpu is the most compatible definition supported by Zephyr, so I have some minor tweaks in an overlay to accommodate the 128 MB SD NAND on the Pendrive.

I would greatly appreciate some guidance on troubleshooting why this is happening. Please let me know what additional information I could provide.

[smfelsher]

After analyzing with AI, it appears I may have been close to an alignment boundary, and the extra code crossed it.

Key finding
The +64KB jump is not from a large new symbol. It’s from alignment padding caused by .flash.rodata crossing a 64KB boundary.

However, additional comments are still welcome!